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WO2018181688A1 - Corps assemblé au rouleau - Google Patents

Corps assemblé au rouleau Download PDF

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Publication number
WO2018181688A1
WO2018181688A1 PCT/JP2018/013182 JP2018013182W WO2018181688A1 WO 2018181688 A1 WO2018181688 A1 WO 2018181688A1 JP 2018013182 W JP2018013182 W JP 2018013182W WO 2018181688 A1 WO2018181688 A1 WO 2018181688A1
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WO
WIPO (PCT)
Prior art keywords
stainless steel
joined body
thickness
rolled joined
aluminum alloy
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Application number
PCT/JP2018/013182
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English (en)
Japanese (ja)
Inventor
功太 貞木
哲平 黒川
橋本　裕介
貴文 畠田
貴史 神代
Original Assignee
東洋鋼鈑株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from JP2017246862A external-priority patent/JP6382435B1/ja
Application filed by 東洋鋼鈑株式会社 filed Critical 東洋鋼鈑株式会社
Publication of WO2018181688A1 publication Critical patent/WO2018181688A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/04—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a rolling mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic

Definitions

  • the present invention relates to a rolled joined body.
  • Metal materials are used in various fields. For example, they are used as parts for electronic devices such as mobile electronic devices (mobile terminals), but the characteristics required for metal materials differ depending on specific applications. For example, a casing for an electronic device is required to have excellent bending rigidity (distortion and bending suppression due to load) in addition to heat dissipation, lightness, and strength.
  • the metal materials used for the housing there is an aluminum alloy excellent in heat dissipation and light weight, and as a processing method there is cutting out of the aluminum alloy.
  • metal materials used for housings are required to be further reduced in weight, thickness, and size.
  • a 6000 series or 7000 series aluminum alloy which is not easily deformed is used as the aluminum alloy.
  • such a hard-to-deform aluminum alloy has extremely poor press workability, and the processing method for the housing is limited to machining, which is superior in terms of cost, productivity, etc. compared to machining. It is difficult to process by processing.
  • a rolled joined body (metal laminate material, clad material) in which two or more kinds of metal plates or metal foils are laminated is also known.
  • a rolled joined body is a highly functional metal material having composite characteristics that cannot be obtained by a single material. For example, a rolled joined body in which stainless steel and aluminum are laminated is being studied.
  • Patent Document 1 discloses a rolled bonded body in which stainless steel and aluminum are laminated with improved tensile strength. Specifically, a two-layer structure of stainless steel layer / aluminum layer or first stainless steel layer / A metal laminate having a three-layer structure of an aluminum layer / second stainless steel layer, the tensile strength TS (MPa) is 200 ⁇ TS ⁇ 550, the elongation EL is 15% or more, and the surface hardness of the stainless steel layer A metal laminate having an HV of 300 or less is described.
  • Patent Document 1 discloses improvement in tensile strength and the like, but does not disclose bending rigidity.
  • the direction in which the force is applied differs between the tensile strength and the bending rigidity.
  • the bending rigidity must be difficult to deform by applying a force from the direction perpendicular to the interface. The point is different.
  • the bending rigidity is also affected by the final tempering and thickness of each layer of the rolled joined body. Therefore, a method for obtaining a rolled joined body having high rigidity in a rolled joined body of stainless steel and aluminum has not been known so far.
  • an object of this invention is to provide the rolling joined body which is excellent in bending rigidity.
  • the present inventors have found that, in a rolled joined body of stainless steel and aluminum, control of the Vickers hardness (HV) of the stainless steel layer and the thickness ratio of the stainless steel layer improves bending rigidity.
  • HV Vickers hardness
  • the gist of the present invention is as follows. (1) A rolled joined body composed of a stainless steel layer and an aluminum alloy layer, wherein a stainless steel layer Vickers hardness A (HV) and a ratio B (%) of the thickness of the stainless steel layer to the thickness of the rolled joined body are expressed by the following formula ( The rolled joined body satisfying I).
  • a rolled joined body having excellent bending rigidity.
  • This rolled joined body can be suitably used as an electronic device component such as a mobile housing using high bending rigidity.
  • FIG. 1 shows the relationship between the thickness ratio of the stainless steel layer and the maximum bending stress in the rolled joined bodies of Examples 1 to 6 and Comparative Examples 1 to 3.
  • FIG. 2 shows the relationship between the hardness of the stainless steel layer and the maximum bending stress in the rolled joined bodies of Examples 1 to 6 and Comparative Examples 1 to 3.
  • FIG. 3 shows the relationship between the hardness and thickness ratio of the stainless steel layer in the rolled joined bodies of Examples 1 to 6 and Comparative Examples 1 to 3.
  • FIG. 4 is a graph of bending load and bending displacement measured from the SUS surface of the rolled joined body of Example 3.
  • FIG. 5 is a perspective view showing the first embodiment of the electronic device casing according to the present invention.
  • FIG. 6 is a cross-sectional perspective view in the X-X ′ direction of the first embodiment of the electronic device casing according to the present invention.
  • the rolled bonded body of the present invention comprises a stainless steel (SUS) layer and an aluminum alloy (Al alloy) layer. Accordingly, the rolled joined body of the present invention comprises two or more layers, preferably 2 to 4 layers, more preferably 2 or 3 layers, and particularly preferably 2 layers.
  • the rolled bonded body is a rolled bonded body composed of two layers of SUS / Al alloy, or a rolled bonded body composed of three layers of SUS / Al alloy / SUS or Al alloy / SUS / Al alloy.
  • the configuration of the rolled joined body can be selected in accordance with the use of the rolled joined body and intended characteristics.
  • a plate material containing at least one additive metal element can be used as a metal element other than aluminum.
  • the additive metal element is preferably Mg, Mn, Si and Cu.
  • the total content of additive metal elements in the aluminum alloy is preferably more than 0.5% by mass, more preferably more than 1% by mass.
  • the aluminum alloy preferably contains at least one additive metal element selected from Mg, Mn, Si and Cu in a total content of more than 1% by mass.
  • the aluminum alloy examples include an Al—Cu alloy (2000 series), an Al—Mn alloy (3000 series), an Al—Si alloy (4000 series), and an Al—Mg alloy (5000 series) as defined in JIS.
  • Al-Mg-Si alloys (6000 series) and Al-Zn-Mg alloys (7000 series) can be used. From the viewpoint of press workability, strength, corrosion resistance and bending rigidity, 3000 series, 5000 series, 6000 series can be used. And 7000 series aluminum alloys are preferred, and 5000 series aluminum alloys are more preferred from the viewpoints of balance and cost.
  • the aluminum alloy preferably contains 0.3% by mass or more of Mg.
  • Stainless steel is not particularly limited, and plate materials such as SUS304, SUS201, SUS316, SUS316L, and SUS430 can be used.
  • As the stainless steel an annealed material (O material) or a 1 / 2H material is preferable from the viewpoint of ensuring adhesion strength at the time of clad bonding.
  • the rolled joined body is characterized in that the Vickers hardness of the stainless steel layer and the ratio of the thickness of the stainless steel layer to the thickness of the rolled joined body satisfy a specific relational expression.
  • the bending load, L is the distance between fulcrums, b is the width of the test piece, and h is the thickness of the test piece)), and the hardness and thickness ratio of the stainless steel layer can be controlled as parameters of the maximum bending stress. I found it the most important.
  • the maximum bending stress ⁇ fM of the rolled joined body is as follows when the Vickers hardness of the stainless steel layer is A (HV) and the ratio of the thickness of the stainless steel layer to the thickness of the rolled joined body is B (%): It can be obtained by the formula (II). ⁇ fM ⁇ (0.028 ⁇ A ⁇ 2.2) ⁇ B + 0.66 ⁇ A + 174 (II)
  • the present inventors have obtained from the formula (II) that, in the rolled joined body composed of a stainless steel layer and an aluminum alloy layer, the Vickers hardness A (HV) of the stainless steel layer and the ratio B ( %) Is represented by the following formula (I) (226 ⁇ 0.66 ⁇ A) / (0.028 ⁇ A ⁇ 2.2) ⁇ B ⁇ 100 (I) It has been found that a rolled joined body satisfying the requirements has a maximum bending stress as high as 400 MPa or more, a high bending rigidity, and is suitable for use in a casing.
  • the Vickers hardness A (HV) of the stainless steel layer and the thickness ratio B (%) of the stainless steel layer are expressed by the following formula (III)
  • a rolled joint satisfying (276 ⁇ 0.66 ⁇ A) / (0.028 ⁇ A ⁇ 2.2) ⁇ B ⁇ 100 (III) has a higher maximum bending stress of 450 MPa or more, and a higher bending rigidity. High and particularly suitable for housing applications.
  • This relational expression is for an aluminum alloy, and this expression cannot always be applied when the aluminum material is pure aluminum.
  • the present invention by controlling the hardness and thickness ratio of the stainless steel layer so as to satisfy the formula (I), it is possible to obtain a rolled joined body having high bending rigidity while maintaining sufficient joining strength.
  • the rolled joined body of the present invention has the same maximum bending stress as that of the H34 material while maintaining the same elongation as the O material of the conventional 0.6 mm 5000 series aluminum alloy plate.
  • the present inventors consider as follows that the hardness and thickness ratio of the stainless steel layer are important parameters for the bending rigidity in the rolled joined body of stainless steel and aluminum alloy.
  • heat treatment at a predetermined temperature is performed to improve the joining strength as described later for the manufacturing method.
  • the heat treatment temperature is a temperature range in which stainless steel is in an unrecrystallized temperature range and is not softened, and aluminum alloy is softened by removing processing strain.
  • the aluminum alloy is annealed from before the joining and from the reduced state at the time of joining, and as a result, the contribution to the bending rigidity of the aluminum alloy is low.
  • stainless steel is not annealed at this heat treatment temperature. Therefore, it is considered that control is necessary because the hardening of stainless steel due to the state immediately before joining and the strain that occurs during joining is directly linked to the hardening of the joined body.
  • the ratio of the thickness of the stainless steel layer to the thickness of the rolled bonded body is not particularly limited as long as it satisfies the formula (I), but is preferably 7 to 70%, more preferably 10 to 70%.
  • the thickness ratio of the stainless steel layer is within this range, the bending rigidity of the rolled joined body becomes sufficiently high, which is suitable for the use of the casing.
  • the thickness ratio of a stainless steel layer means the ratio of the sum total of the thickness of the stainless steel layer with respect to the thickness of a rolling joining body, when two or more stainless steel layers exist.
  • the thickness of the rolled joined body is not particularly limited, and the upper limit is usually 3.0 mm or less, preferably 2.2 mm or less, and more preferably 1.5 mm or less.
  • the lower limit is 0.2 mm or more, preferably 0.3 mm or more, more preferably 0.4 mm or more.
  • the thickness of the rolled joined body is preferably 0.2 mm to 3.0 mm, more preferably 0.3 mm to 2.2 mm, and more preferably 0.4 mm to 1.5 mm.
  • the thickness of the rolled joined body refers to the total thickness of the stainless steel layer and the aluminum alloy layer.
  • the thickness of the rolled bonded body refers to the average value of the measured values obtained by measuring the thickness at any 30 points on the rolled bonded body with a micrometer or the like.
  • the thickness of the stainless steel layer is usually 0.01 mm or more, and the lower limit is preferably 0.045 mm or more, more preferably 0.1 mm or more, from the viewpoints of formability and strength.
  • the upper limit is not particularly limited, but if it is too thick with respect to the aluminum alloy layer, the elongation and formability may be lowered. Therefore, it is preferably 0.6 mm or less, more preferably 0.5 mm or less, and further from the viewpoint of weight reduction. In addition, 0.4 mm or less is particularly preferable.
  • the thickness of the stainless steel layer is preferably 0.01 mm to 0.6 mm, more preferably 0.045 mm to 0.5 mm, and further preferably 0.1 mm to 0.4 mm.
  • the thickness of the stainless steel layer of the rolled joined body refers to the thickness of each stainless steel layer when the rolled joined body has two or more stainless steel layers. The thickness of the stainless steel layer of the rolled joined body can be determined in the same manner as the aluminum alloy layer.
  • the Vickers hardness (HV) of the stainless steel layer is preferably 180 or more, and more preferably 200 or more.
  • the Vickers hardness (HV) of the stainless steel layer is preferably 350 or less, more preferably 330 or less.
  • the Vickers hardness (HV) of the stainless steel layer is preferably 180 to 350, more preferably 200 to 330.
  • the Vickers hardness of the stainless steel layer can be measured according to JIS Z 2244 (Vickers hardness test-test method) using, for example, a micro Vickers hardness meter (load 200 gf).
  • JIS Z 2244 Vans hardness test-test method
  • a micro Vickers hardness meter load 200 gf
  • the rolled joined body of the present invention has two or more stainless steel layers, it is preferable that all of them have the Vickers hardness.
  • the thickness of the aluminum alloy layer is usually applicable if it is 0.05 mm or more, and is preferably 0.1 mm or more, more preferably 0.2 mm or more from the viewpoint of mechanical strength and workability of the rolled joined body. .
  • the upper limit is preferably 2.5 mm or less, more preferably 1.7 mm or less, and even more preferably 1.1 mm or less from the viewpoint of weight reduction and cost.
  • the thickness of the aluminum alloy layer is preferably 0.05 mm to 2.5 mm, more preferably 0.1 mm to 1.7 mm, and more preferably 0.2 mm to 1.1 mm.
  • the thickness of the aluminum alloy layer of the rolled joined body refers to the thickness of each aluminum alloy layer when the rolled joined body has two or more aluminum alloy layers.
  • the thickness of the aluminum alloy layer of the rolled joined body is obtained by obtaining an optical micrograph of the cross section of the rolled joined body, measuring the thickness of the aluminum alloy layer at any 10 points in the optical micrograph, and the average value of the obtained values. Say.
  • the Vickers hardness (HV) of the aluminum alloy layer is not particularly limited, but is preferably 40 to 60. In the present invention, the Vickers hardness of the aluminum alloy layer can be measured in the same manner as in the case of the stainless steel layer. When the rolled joined body of the present invention has two or more aluminum alloy layers, all of them have the above-mentioned Vickers hardness.
  • the maximum bending stress is used as an index of bending rigidity.
  • the maximum bending stress of a rolled joined body is the bending load (maximum value) (maximum bending) measured in accordance with JIS K 7171 (Plastics-Determination of bending characteristics) and JIS Z 2248 (Metal material bending test method). Load).
  • the maximum bending stress ⁇ fM is determined using terms and definitions of JIS K 7171, and for the three-point bending test, refer to FIG. 5 of JIS Z 2248, the radius of the support is 5 mm, and the distance between the fulcrums is 40 mm. Then, after obtaining a bending load and bending displacement graph as shown in FIG. 4, ⁇ fM is calculated.
  • the maximum bending stress is an average value of the maximum bending stress values for both surfaces of the rolled joined body.
  • the bending load can be measured in accordance with JIS K 7171 (Plastic-Determination of bending characteristics) by preparing a test piece having a width of 20 mm from a rolled joined body. In the bending test, the distance between fulcrums was 40 mm.
  • the rolled joined body preferably has a maximum bending stress of 400 MPa or more, more preferably 450 MPa or more.
  • the Vickers hardness and thickness ratio of the stainless steel layer are set so as to satisfy the formula (I), thereby having a high maximum bending stress of 400 MPa or more.
  • Is set so as to satisfy the above it is possible to obtain a rolled joined body having a high maximum bending stress of 450 MPa or more and thus having a high bending rigidity and suitable for a housing application.
  • the rolling joined body which has the target maximum bending stress can be obtained by setting the Vickers hardness or thickness ratio of a stainless steel layer according to Formula (II).
  • the maximum bending stress measured from the stainless steel layer side is preferably 400 MPa or more, and more preferably 450 MPa or more.
  • the maximum bending stress measured from the aluminum alloy layer side is preferably 360 MPa or more, and more preferably 450 MPa or more.
  • the bending joint (maximum value) of the rolled joined body is preferably 50 N / 20 mm or more, and more preferably 90 N / 20 mm or more.
  • the bending load of the rolled joined body refers to an average value of values obtained by measuring the both sides of the rolled joined body.
  • the bending load measured from the aluminum layer side is preferably 50 N / 20 mm or more, more preferably 90 N / 20 mm or more.
  • the bending load measured from the stainless steel layer side is preferably 50 N / 20 mm or more, more preferably 90 N / 20 mm or more.
  • the rolled joined body has a peel strength (also referred to as 180 ° peel strength or 180 ° peel strength) of preferably 40 N / 20 mm or more, and more preferably 60 N from the viewpoint that the rolled joined body has excellent press workability. / 20 mm or more. Peel strength can be used as an index of adhesion strength. In addition, in the rolling joined body which consists of 3 layers or more, it is preferable that a peel strength is 60 N / 20mm or more in each joining interface. In addition, when peel strength becomes remarkably high, since it does not peel and it will be material fracture
  • the peel strength of the rolled joined body is obtained by preparing a test piece having a width of 20 mm from the rolled joined body, partially peeling the stainless steel layer and the aluminum alloy layer, fixing the thick film layer side or the hard layer side, When the layer was pulled 180 ° opposite to the fixed side, the force required for peeling was measured, and N / 20 mm was used as the unit. In the same test, the peel strength does not change if the width of the test piece is between 10 and 30 mm.
  • the rolled joined body preferably has an elongation by a tensile test with a test piece width of 15 mm of 35% or more, and more preferably 40% or more from the viewpoint of good press workability.
  • the elongation by the tensile test can be measured by using, for example, a test piece of a tensile strength test described later, according to the measurement of elongation at break described in JIS Z 2241 or JIS Z 2201.
  • a rolled joined body having an elongation by tensile test of 35% or more is preferable because it can be easily formed into a casing.
  • a casing using the rolled joined body for example, when the casing includes a rolled joined body on the back surface, the casing is used. In the case of the back surface, it is not necessary to satisfy the elongation by the tensile test which is preferable for the rolled joined body.
  • a rolled bonded body can be obtained by the following rolling bonding method by preparing a stainless steel plate and an aluminum alloy plate.
  • the surface can be manufactured by performing brush polishing or the like on the joining surface of the stainless steel plate and the aluminum alloy plate, then superimposing the two and joining them while cold rolling, and further subjecting them to an annealing treatment.
  • the cold rolling process may be performed in multiple stages, and temper rolling may be added after the annealing treatment.
  • the final reduction ratio (the reduction ratio calculated from the thickness of the pre-bonding original sheet and the rolled bonded body) is 20% to 90% rolled and joined.
  • the thickness of the original plate is 0.0125 to 6 mm for the stainless steel plate, preferably 0.056 to 5 mm, more preferably 0.063 to 4 mm, and the aluminum alloy plate is The thickness is 0.063 to 25 mm, preferably 0.13 to 17 mm, and more preferably 0.25 to 11 mm.
  • the warm joining method it can be manufactured by brushing the joining surfaces as in the cold joining method and then heating both or one of them to 200 to 500 ° C. it can.
  • the final rolling reduction is about 15 to 40%.
  • the thickness of the original plate is 0.012 to 1 mm for the stainless steel plate, preferably 0.053 to 0.83 mm, more preferably 0.059 to 0.067 mm
  • the aluminum alloy plate has a thickness of 0.059 to 4.2 mm, preferably 0.19 to 2.8 mm, more preferably 0.24 to 1.8 mm.
  • the reduction ratio of the stainless steel layer between the step of sputter etching the bonding surfaces of the stainless steel plate and the aluminum alloy plate and the sputter etched surfaces is 0. It can be manufactured by a method including a step of joining by pressure welding so as to achieve a light rolling of 25% to 25% and a step of performing batch heat treatment at 200 ° C. to 370 ° C. or continuous heat treatment at 300 ° C. to 800 ° C. In this manufacturing method, the number of layers of the obtained rolled joined body can be changed according to the number of times the sputter etching treatment step and the joining step are performed.
  • a rolled joined body composed of two layers has a sputter etching treatment step. And a combination of bonding steps once, and then heat treatment can be performed, and the three-layer rolled joined body is subjected to heat treatment after repeating the combination of the sputter etching treatment step and the bonding step twice. It can be manufactured by doing.
  • the joining method for obtaining the joined body is not limited. However, if the hardness of the stainless steel becomes too high, the stainless steel tends to be damaged due to a decrease in toughness, and in the joined body of an aluminum alloy and stainless steel. Since it is difficult to soften and anneal stainless steel during annealing after joining, a final rolling reduction of 40% or less is preferable in any joining method. More preferably, it is 30% or less, More preferably, it is 25% or less. In particular, if the rolling reduction ratio of the stainless steel layer becomes too high, remarkable work hardening occurs and the toughness decreases, so there is a risk of cracking in the stainless steel layer during rolling joining, handling, or use as a housing. The rolling reduction is preferably 35% or less.
  • a method for manufacturing surface activated bonding that is easy to bond even when the rolling reduction is low will be described.
  • the stainless steel plate that can be used is the above-mentioned stainless steel plate material for the rolled joined body.
  • the thickness of the stainless steel plate before joining is usually applicable if it is 0.01 mm or more, and the lower limit is preferred for maximum bending stress when there is a handling property or a certain thickness of stainless steel as a rolled joined body. From the viewpoint, and from the viewpoint of securing a polishing allowance for decoration and mirror finishing after making the housing, it is preferably 0.045 mm or more, more preferably 0.1 mm or more.
  • the upper limit is not particularly limited because the maximum bending stress is higher when the stainless steel ratio is higher, but it is heavier when the stainless steel thickness becomes too thick. More preferably, it is 0.5 mm or less, More preferably, it is 0.4 mm or less.
  • the thickness of the stainless steel plate before joining can be measured with a micrometer or the like, and means an average value of thicknesses measured at 10 points randomly selected from the surface of the stainless steel plate.
  • the Vickers hardness (HV) of the stainless steel plate before joining is preferably 180 or more, more preferably 200 or more.
  • the hardness of the stainless steel layer in the rolled joined body affects the bending rigidity, but as described above, it is considered that the influence of the hardening of the stainless steel due to the state immediately before joining and the strain entering at the time of joining is large. It is preferable to control the hardness of the plate to some extent. Therefore, the Vickers hardness (HV) of the stainless steel layer is preferably 350 or less, more preferably 330 or less.
  • the Vickers hardness (HV) of the stainless steel layer is preferably 180 to 350, more preferably 200 to 330. When the hardness of the stainless steel layer is within this range, it is possible to achieve both bending rigidity and formability in the rolled joined body.
  • the aluminum alloy plate that can be used is the above-described aluminum alloy plate material for a rolled joined body.
  • the thickness of the aluminum alloy plate before joining is usually applicable if it is 0.05 mm or more, and the lower limit is preferably 0.1 mm or more, more preferably 0.2 mm or more.
  • the upper limit is usually 3.3 mm or less, preferably 2.2 mm or less, more preferably 1.5 mm or less from the viewpoint of weight reduction and cost.
  • the thickness of the aluminum alloy plate before joining can be determined in the same manner as the stainless steel plate.
  • the joining surface of the stainless steel plate and the joining surface of the aluminum alloy plate are each sputter etched.
  • the sputter etching process is performed by preparing a stainless steel plate and an aluminum alloy plate as a long coil having a width of 100 mm to 600 mm, and using the stainless steel plate and the aluminum alloy plate each having a joint surface as one electrode grounded, An alternating current of 1 MHz to 50 MHz is applied to another electrode supported by insulation to generate a glow discharge, and the area of the electrode exposed in the plasma generated by the glow discharge is set to the area of the other electrode. 1/3 or less.
  • the grounded electrode is in the form of a cooling roll to prevent the temperature of each conveying material from rising.
  • the surface where the stainless steel plate and aluminum alloy plate are joined is sputtered with an inert gas in a vacuum to completely remove the adsorbed material on the surface and remove part or all of the oxide film on the surface.
  • the oxide film does not necessarily need to be completely removed, and a sufficient bonding force can be obtained even if it remains partially. By leaving a part of the oxide film, it is possible to significantly reduce the sputter etching processing time as compared with the case where the oxide film is completely removed, and to improve the productivity of the metal laminate material.
  • the adsorbed material on the surface is about the etching amount of any of stainless steel plate and aluminum alloy plate to which argon, neon, xenon, krypton, etc. or a mixed gas containing at least one of them can be applied. It can be completely removed by about 1 nm (in terms of SiO 2 ).
  • the sputter etching process for a stainless steel plate can be performed under vacuum, for example, with a plasma output of 100 W to 1 KW for 1 to 50 minutes, and for a long material such as a line material, for example. Under vacuum, for example, it can be performed at a plasma output of 100 W to 10 KW and a line speed of 1 m / min to 30 m / min.
  • the degree of vacuum at this time is preferably higher in order to prevent re-adsorbed substances on the surface, but may be, for example, 1 ⁇ 10 ⁇ 5 Pa to 10 Pa.
  • the temperature of the stainless steel plate is preferably maintained at room temperature to 150 ° C. from the viewpoint of preventing the aluminum alloy plate from being softened.
  • the stainless steel plate with a part of the oxide film remaining on the surface can be obtained by setting the etching amount of the stainless steel plate to 1 nm to 10 nm, for example. If necessary, the etching amount may exceed 10 nm.
  • the sputter etching process for an aluminum alloy plate can be performed under a vacuum, for example, with a plasma output of 100 W to 1 KW for 1 to 50 minutes, or for a long material such as a line material. In this case, it can be performed at a plasma output of 100 W to 10 KW and a line speed of 1 m / min to 30 m / min.
  • the degree of vacuum at this time is preferably higher in order to prevent re-adsorbed substances on the surface, but may be 1 ⁇ 10 ⁇ 5 Pa to 10 Pa.
  • the aluminum alloy plate in which a part of the oxide film on the surface remains can be obtained by setting the etching amount of the aluminum alloy plate to 1 nm to 10 nm, for example. If necessary, the etching amount may exceed 10 nm.
  • the joining surface of the stainless steel plate and aluminum alloy plate sputter-etched as described above is subjected to, for example, roll pressing so that the rolling reduction of the stainless steel layer is 0% to 25%, preferably 0% to 15%.
  • the stainless plate and the aluminum alloy plate are joined by pressure welding.
  • the reduction ratio of the stainless steel layer is obtained from the thickness of the stainless steel plate before joining and the thickness of the stainless steel layer of the final rolled joined body. That is, the rolling reduction ratio of the stainless steel layer is obtained by the following formula: (thickness of stainless steel plate before joining-thickness of stainless steel layer of final rolled joined body) / thickness of stainless steel plate of material before joining. .
  • the aluminum alloy layer is often more easily deformed, and the reduction rate of the stainless steel layer is lower than the reduction rate of the aluminum alloy layer.
  • the stainless steel layer tends to cause work hardening when the rolling reduction is high, it is preferably 15% or less, more preferably 10% or less, and further preferably 8% or less.
  • the lower limit of the rolling reduction is 0%.
  • the hardness of the stainless steel plate is low, it is possible to improve the bending rigidity by deliberate work hardening. It is. In this case, it is preferably 0.5% or more, more preferably 2% or more, and further preferably 3% or more.
  • the reduction ratio of the stainless steel layer is preferably 0% to 15% from the viewpoint of achieving both high bending rigidity and suppression of work hardening. Further, in the surface activated bonding method, it can be made 10% or less in particular, and it becomes possible to further suppress the hardening of the stainless steel.
  • the reduction ratio of the aluminum alloy layer is not particularly limited, but is preferably 5% or more, more preferably 8% or more, and more preferably 10% in order to ensure the bonding strength before the diffusion heat treatment. That's it.
  • the rolling reduction of the aluminum alloy layer is 5% or more, the peel strength after the heat treatment is improved.
  • the rolling reduction of the aluminum alloy layer is determined from the thickness of the aluminum alloy plate before joining and the thickness of the aluminum alloy layer of the final rolled joined body. That is, the reduction ratio of the aluminum alloy layer is expressed by the following formula: (the thickness of the aluminum alloy plate of the material before joining ⁇ the thickness of the aluminum alloy layer of the final rolled joined body) / the thickness of the aluminum alloy plate of the material before joining. , Is required.
  • the upper limit of the reduction ratio of the aluminum alloy layer is not particularly limited, and is not limited to, for example, the surface activated bonding method, but is 70% or less, preferably 50% or less, and more preferably 40% or less.
  • the upper limit of the rolling reduction of the aluminum alloy layer is within this range, it is easy to ensure the bonding force while maintaining the thickness accuracy.
  • the surface activated bonding method it can be particularly 18% or less, and the flatness of the aluminum alloy layer can be further maintained.
  • the rolling reduction of the rolled joined body is preferably 40% or less, more preferably 15% or less, and still more preferably 14% or less in the case of the surface activated joining method.
  • the lower limit is not particularly limited, but is preferably 4% or more, more preferably 5% or more, still more preferably 6% or more, and particularly preferably 7.5% or more from the viewpoint of bonding strength.
  • the upper limit can be made 15% or less and the lower limit can be made 4% or more, and it is easy to obtain characteristics more stably.
  • the rolling reduction of the rolled joined body is determined from the total thickness of the stainless steel plate and aluminum alloy plate of the material before joining and the final thickness of the rolled joined body.
  • the rolling reduction ratio of the rolled joined body is expressed by the following formula: (total thickness of stainless steel plate and aluminum alloy plate before material-final thickness of rolled joined body) / stainless steel plate and aluminum alloy material before joining It is calculated
  • the rolling line load of the roll pressure welding is not particularly limited, and is set so as to achieve a predetermined rolling reduction of the aluminum alloy layer and the rolled joined body.
  • 1.6 tf / cm to 10 It can be set in the range of 0.0 tf / cm.
  • the rolling line load of the roll pressure welding is preferably 1.9 tf / cm to 4.0 tf / cm, more preferably 2.3 tf / cm to 3.0 tf / cm. cm.
  • the rolling line load may be increased to secure the pressure in order to achieve a predetermined reduction ratio. It may be necessary and is not limited to this numerical range.
  • the temperature at the time of bonding is not particularly limited, and is, for example, from room temperature to 150 ° C. in the case of surface activated bonding.
  • bonding is performed in a non-oxidizing atmosphere, for example, an inert gas such as Ar, in order to prevent the bonding strength between the stainless steel plate and the aluminum alloy plate from being reduced due to re-adsorption of oxygen. It is preferable to carry out in an atmosphere.
  • a non-oxidizing atmosphere for example, an inert gas such as Ar, in order to prevent the bonding strength between the stainless steel plate and the aluminum alloy plate from being reduced due to re-adsorption of oxygen. It is preferable to carry out in an atmosphere.
  • the rolled joined body obtained by joining the stainless steel plate and the aluminum alloy plate as described above is subjected to heat treatment.
  • heat treatment By heat treatment, the adhesion between the layers can be increased and sufficient bonding strength can be obtained.
  • This heat treatment can also serve as annealing of the rolled joined body, particularly the aluminum alloy layer.
  • the heat treatment temperature is, for example, 200 ° C. to 370 ° C. in the case of batch heat treatment, preferably 250 ° C. to 345 ° C., for example, in the case of continuous heat treatment, it is 300 to 800 ° C., preferably 350 ° C. to 550 ° C. It is.
  • stainless steel is in an unrecrystallized temperature range and is not softened substantially
  • aluminum alloy is a temperature range in which processing strain is removed and softened.
  • the heat treatment temperature refers to the temperature of the rolled joined body that undergoes the heat treatment.
  • At least a metal element (for example, Fe, Cr, Ni) contained in the stainless steel is thermally diffused into the aluminum alloy layer.
  • the metal element contained in the stainless steel and aluminum may be thermally diffused with each other.
  • the heat treatment time can be appropriately set according to the heat treatment method (batch heat treatment or continuous heat treatment), the heat treatment temperature and the size of the rolled joined body to be heat treated.
  • the rolling joined body is kept soaked for 0.5 to 10 hours, preferably 2 to 8 hours after the temperature of the rolled joined body reaches a predetermined temperature. If no intermetallic compound is formed, there is no problem even if batch heat treatment is performed for 10 hours or more.
  • the rolled joined body is kept soaked for 20 seconds to 5 minutes after the temperature of the rolled joined body reaches a predetermined temperature.
  • the heat treatment time refers to the time after the rolled joined body to be heat treated reaches a predetermined temperature, and does not include the temperature rise time of the rolled joined body.
  • heat treatment time for example, for materials as small as A4 size (paper size), about 1 to 2 hours is sufficient for batch heat treatment, but long materials such as coil materials with a width of 100 mm or more and a length of 10 m or more are large. As for materials, batch heat treatment requires about 2 to 8 hours.
  • a rolled joined body having a thick aluminum alloy layer with respect to a target thickness is once produced, and then the aluminum alloy layer of the rolled joined body is produced. May be ground to reduce the thickness to a target thickness.
  • the outermost surface of the aluminum alloy layer can be cured.
  • the shape of the rolled joined body obtained by joining and heat treatment may be corrected by a tension leveler so that the elongation percentage is about 1 to 2%. By this shape modification, the thickness can be reduced by about 1 to 2%, the aluminum alloy layer can be hardened, and the Vickers hardness can be improved. These means may be appropriately combined. For example, after the shape correction by the tension leveler is performed, the aluminum alloy layer can be ground.
  • a raw material having a higher Vickers hardness in order of increasing hardness, a refining symbol H> 3 / 4H> 1 / 2H> BA
  • H> 3 / 4H> 1 / 2H> BA a refining symbol
  • BA refining symbol
  • processing becomes difficult if the Vickers hardness of the stainless steel layer is too high.
  • the Vickers hardness of the stainless steel layer increases from about 200 (Hv) to about 270 (Hv) by joining so that the rolling reduction of the stainless steel layer is 0.5 to 10%.
  • the rolled joined body produced as described above forms an outline by deep drawing by pressing, and the outer side including the back surface is subjected to surface treatment such as polishing, chemical conversion treatment, and coating. Further, the inner surface side may be cut and ground as necessary mainly for the incorporation of internal parts to form irregularities. Moreover, it is also possible to insert-mold with resin as needed, and to form the composite part of a metal and resin on the inner and outer surfaces. Although it can process into a housing
  • the rolled bonded body of the present invention can be used as an electronic device component and has high bending rigidity and toughness. Therefore, the rolled bonded body of the present invention is used as a housing of an electronic device, particularly a mobile electronic device (mobile terminal). It can be used as a body.
  • the rolled joined body of the present invention has high shape retention.
  • the process for the purpose of discoloration suppression or decoration may be performed. Even after the aluminum alloy material and the stainless steel material are subjected to processing such as polishing and grinding in the step after the housing molding, there is no problem as long as it is within the thickness ratio range of the present application.
  • the electronic device casing preferably includes the rolled joined body of the present invention on the back surface and / or the side surface.
  • FIG. 5 and FIG. 6 show a first embodiment of an electronic device casing using the rolled joined body of the present invention.
  • FIG. 5 is a perspective view showing a first embodiment of an electronic equipment casing using the rolled joined body of the present invention
  • FIG. 6 is a first perspective view of an electronic equipment casing using the rolled joined body of the present invention. It is a cross-sectional perspective view in the XX ′ direction of the embodiment.
  • the electronic device housing 5 can include the rolled joined body of the present invention, which includes the back surface 50 and the side surface 51, and the back surface 50 and the side surface 51 or a part thereof includes a stainless steel layer and an aluminum alloy layer.
  • the back surface refers to a surface on the opposite side to a side where a display unit (display, not shown) is provided in a housing constituting an electronic device (mobile terminal) such as a smartphone.
  • a metal material or a plastic material other than the rolled joined body may be laminated inside the electronic device casing 5.
  • the electronic device housing 5 includes the rolled joined body on the back surface 50, the whole or a part of the back surface 50 (for example, 2 cm ⁇ 2 cm or more, for example, 25 mm ⁇ 25 mm as shown by the plane portion A in FIG. 5) It is sufficient that the flat portion) satisfies the above-described characteristics described for the rolled joined body.
  • casing 5 is a structure containing the rolling joining body in the back surface 50, it is not limited to this structure depending on the structure of an electronic device,
  • the structure which the back surface 50 and the side surface 51 consist of a rolling joining body.
  • the side surface 51 may include a rolled joined body.
  • an electronic device casing which is a center frame, shows an electronic device structure sandwiched between a display unit such as glass or resin and a back surface, and the electronic device casing is connected to the side surface and the side surface.
  • an internal reinforcing frame (which constitutes the back surface of the electronic device casing).
  • the electronic device casing can include the rolled joined body of the present invention in which the side surface and the internal reinforcing frame or a part thereof includes a stainless steel layer and an aluminum alloy layer.
  • the internal reinforcement frame means a support plate that is located inside an electronic device such as a smartphone and serves as a support for improving rigidity of the entire electronic device and mounting components such as a battery and a printed board. .
  • the internal reinforcement frame usually has holes for connection and assembly. The hole can be opened by, for example, a press.
  • the side surface and the internal reinforcing frame can be integrally formed, but the present invention is not limited to this, and the side surface and the internal reinforcing frame may not be integrated. Moreover, you may apply a rolling joined body only to a side surface.
  • the electronic device casing of the present embodiment can be modified as appropriate according to the structure of the electronic device, and is limited to the structure described above, similarly to the electronic device casing 5 described above. is not.
  • Example 1 A rolled joined body was prepared by a surface activated joining method.
  • SUS304 1 / 2H was used as the stainless steel plate, and aluminum alloy A5052 was used as the aluminum plate.
  • Sputter etching was performed on SUS304 and A5052. Sputter etching for SUS304 was performed under conditions of 0.1 Pa, plasma output 700 W, 13 minutes, and sputter etching for A5052 was performed under conditions of 0.1 Pa, plasma output 700 W, 13 minutes. did.
  • the SUS304 and A5052 after the sputter etching treatment are rolled at a rolling roll diameter of 100 mm to 250 mm and a rolling line load of 1.9 tf / cm to 4.0 tf / cm at room temperature to reduce the rolling reduction of the stainless steel layer to 0% to 5%. Then, they were joined by roll pressure welding to obtain a rolled joined body of SUS304 and A5052. This rolled joined body was subjected to batch heat treatment at 300 ° C. for 2 hours.
  • Example 2 to Example 2 are the same as Example 1 except that the tempering and thickness of the original stainless steel plate and / or the thickness of the aluminum plate of the original plate are changed, and the pressing force during bonding is changed to a predetermined value.
  • the rolled joined bodies of 3, 5 and Comparative Examples 1 to 3 were obtained.
  • BA materials were used in Examples 4, 5, and 6 and Comparative Examples 1 and 3, and 1 ⁇ 2H materials were used in the same manner as in Example 1.
  • SUS316L was used as the stainless steel plate.
  • Example 4 SUS304 BA was used as the stainless steel plate, and aluminum alloy A5052 was used as the aluminum plate. Sputter etching was performed on SUS304 and A5052. Sputter etching for SUS304 was performed under conditions of 0.1 Pa, plasma output 4800 W, and line speed 4 m / min, and sputter etching for A5052 was performed under 0.1 Pa, plasma output 6400 W, line speed 4 m / min. It carried out on the conditions of a minute. SUS304 and A5052 after the sputter etching treatment were joined by roll pressure welding at room temperature at a rolling line load of 3.0 tf / cm to 6.0 tf / cm to obtain a rolled joined body of SUS304 and A5052. This rolled joined body was subjected to batch annealing at 300 ° C. for 8 hours.
  • Example 6 A rolled joined body (thickness: 1.00 mm) of a stainless steel plate (SUS304 BA) and an aluminum alloy plate (A5052) was prepared by a cold joining method. The surface of the stainless steel plate and the aluminum alloy plate were subjected to brush polishing or the like, and then both were overlapped and joined together while cold rolling, and further subjected to an annealing treatment.
  • the thickness, Vickers hardness and bending load were measured, and the maximum bending stress was calculated from the value of the bending load.
  • the thickness, Vickers hardness and bending load were measured as follows.
  • a test piece having a width of 20 mm was prepared from the rolled joined body, and using a Tensilon universal material testing machine RTC-1350A (manufactured by Orientec Co., Ltd.), JIS K 7171 (Plastic-Determination of bending characteristics) and JIS Z 2248 (Metal)
  • the bending load (maximum value) was measured according to the material bending test method. Specifically, referring to FIG. 5 of JIS Z 2248, a three-point bending test was performed with the radius of the press fitting being 5 mm, the radius of the support being 5 mm, and the distance between the fulcrums being 40 mm.
  • FIG. 4 is a graph of bending load and bending displacement measured from the SUS surface for the rolled joined body of Example 3. The bending load was measured from each surface of the stainless steel layer and aluminum alloy layer of the rolled joined body.
  • the maximum bending stress was calculated for each of the stainless steel layer and the aluminum alloy layer. The average value of the maximum bending stress of the obtained stainless steel layer and aluminum alloy layer was calculated.
  • Table 1 shows the structures and evaluation results of the rolled joined bodies of Examples 1 to 6 and Comparative Examples 1 to 3.
  • FIG. 1 shows the relationship between the thickness ratio (SUS ratio) of the stainless steel layer and the maximum bending stress in the rolled joined bodies of Examples 1 to 6 and Comparative Examples 1 to 3, and FIG. The relationship between the hardness of the stainless steel layer (SUS hardness) and the maximum bending stress in the rolled joined bodies of Comparative Examples 1 to 3 is shown.
  • the value of the maximum bending stress in FIGS. 1 and 2 is an average value of the maximum bending stress in Table 1.
  • the maximum bending stress of the O material of the 0.3 mm-thick aluminum alloy A5052 was measured by the same measurement method and found to be 242.34. Moreover, when 0.3 mm and 0.8 mm of H34 material of aluminum alloy A5052 were measured, they were 442.67 and 462.66, respectively.
  • FIG. 1 and FIG. 2 show that the maximum bending stress of the rolled joint of stainless steel and aluminum alloy is greatly influenced by the characteristics of stainless steel, and in particular, the contribution of the thickness ratio and hardness of the stainless steel layer is large. .
  • Table 1 and FIG. 1 when the hardness of the stainless steel layer is the same, the maximum bending stress increased as the thickness ratio of the stainless steel layer increased (comparison of Examples 1, 2, 4 and Examples 5 and Comparative Examples 1 and 3).
  • Table 1 and FIG. 2 suggest that the maximum bending stress increases as the hardness of the stainless steel layer increases when the thickness ratio of the stainless steel layer is the same (comparison of Examples 3 and 4 and Comparative Example 3). ).
  • the maximum bending stress of the rolled joined body is particularly greatly contributed by the thickness ratio and hardness of the stainless steel layer to the maximum bending stress of the rolled joined body.
  • the relational expression between the thickness ratio and the hardness of the stainless steel layer was derived. Specifically, first, when the hardness of the stainless steel layer is substantially constant, a relational expression between the maximum bending stress ⁇ fM and the thickness ratio B (%) of the stainless steel layer is obtained, and the hardness HV of the stainless steel layer is about 200.
  • ⁇ fM (c ⁇ A + d) XB + (e ⁇ A + f).
  • FIG. 3 shows the relationship between the hardness of the stainless steel layer (SUS hardness) and the thickness ratio of the stainless steel layer (SUS ratio) in the rolled joined bodies of Examples 1 to 6 and Comparative Examples 1 to 3.
  • the rolled joints of Examples 1 to 6 in which the thickness ratio B (%) and the hardness A (HV) of the stainless steel layer satisfy the formula (I) all have a high maximum bending stress of 400 MPa or more. And has excellent bending rigidity.
  • Example 7 An electronic device casing molded from a rolled joined body made of a stainless steel layer / aluminum alloy layer was produced. First, the following types of materials were prepared as original plates, and a rolled joined body was manufactured by a surface activated joining method. SUS304 BA (thickness 0.250 mm) was used as the stainless steel material, and aluminum alloy A5052 (thickness 0.800 mm) was used as the aluminum alloy material. Sputter etching processing was performed on each surface where SUS304 and A5052 were bonded.
  • Sputter etching for SUS304 was conducted with Ar as a sputter gas, under conditions of 0.1 Pa, plasma output of 4800 W, line speed of 4 m / min, and sputter etching for A5052 with Ar as a sputter gas. The test was performed under the conditions of plasma output 6400 W and line speed 4 m / min under 0.1 Pa.
  • SUS304 and A5052 after the sputter etching treatment were joined by roll pressure welding at a room temperature at a rolling line load of 3.0 tf / cm to 6.0 tf / cm to obtain a rolled joined body of SUS304 and A5052. This rolled joined body was subjected to batch heat treatment at 320 ° C.
  • the rolled joint was subjected to shape correction with an elongation of about 1 to 2% using a tension leveler. As a result, the total thickness of the rolled joined body was reduced by about 1 to 2%, and the aluminum alloy layer was cured to produce a rolled joined body having a total thickness of 0.970 mm.
  • the obtained rolled joined body was deep drawn at a length of 150 mm ⁇ width of 75 mm and a depth of 10 mm.
  • the stainless steel layer was polished and the aluminum alloy layer was ground to produce a casing having a total thickness of 0.580 mm, which was the back surface of the electronic device.
  • Example 7 the electronic device casing of Example 7 obtained by forming a rolled joined body composed of a stainless steel layer and an aluminum alloy layer is similar to the above-described formula (I) in the same manner as the rolled joined body of the Example. And had a high maximum bending stress of 450 MPa or more and excellent bending rigidity. This maximum bending stress is in a range that does not adversely affect the components mounted inside the electronic device casing, and can reduce the overall thickness of the electronic device, increase the battery capacity, increase the mounting capacity, etc. .
  • Reference Example 1-7 The rolled joined body of Reference Example 1-7 was produced, and the following characteristics were evaluated.
  • Reference example 1 SUS304 (thickness 0.2 mm) was used as the stainless steel material, and aluminum alloy A5052 (thickness 0.8 mm) was used as the aluminum material.
  • Sputter etching was performed on SUS304 and A5052. Sputter etching for SUS304 was performed under conditions of 0.1 Pa, plasma output 700 W, 13 minutes, and sputter etching for A5052 was performed under conditions of 0.1 Pa, plasma output 700 W, 13 minutes. did.
  • SUS304 and A5052 after sputter etching treatment were joined by roll pressure welding at normal temperature at a rolling roll diameter of 130 to 180 mm and a rolling line load of 1.9 tf / cm to 4.0 tf / cm.
  • a rolled joint was obtained.
  • This rolled joined body was subjected to batch annealing at 300 ° C. for 2 hours.
  • the rolling reduction of the stainless steel layer, the aluminum alloy layer, and the rolled joined body (whole) was calculated from the thickness of the original plate before joining and the final thickness of the rolled joined body, respectively.
  • Reference Examples 2-4, 6-7 Reference Example 2-4 was performed in the same manner as Reference Example 1 except that the thickness of the aluminum sheet of the original plate, the reduction ratio during bonding by changing the pressing force during bonding, and / or the annealing temperature were changed to predetermined values. 6-7 rolled joints were obtained.
  • Reference Example 2 the rolled joined body produced in Example 3 was cut out and used for evaluation, but there was a slight difference in the thickness of the rolled joined body.
  • Example 5 The rolled joined body produced in Example 4 was cut out and used for evaluation.
  • the 180 ° peel strength was measured for the rolled joined body after joining and before annealing, and the final rolled joined body after annealing. Further, with respect to the rolled joined body of Reference Example 1-7, tensile strength and elongation were measured, and bending workability and drawing workability were evaluated. Measurement of 180 ° peel strength, tensile strength and elongation, and evaluation of bending workability and drawing workability were performed as follows.
  • a test piece having a width of 20 mm was prepared from the rolled joined body, the stainless steel layer and the aluminum layer were partially peeled off, the aluminum layer side was fixed, the stainless steel layer was 180 ° opposite to the aluminum layer side, and the tensile speed was 50 mm / min.
  • the force (unit: N / 20 mm) required for tearing off was measured using a Tensilon universal material testing machine RTC-1350A (manufactured by Orientec Co., Ltd.).
  • Bending was performed by the V-block method (metal fitting angle 60 °, metal fitting R0.5, load 1 kN, test material width 10 mm, JIS Z 2248).
  • Table 3 shows the configuration, production conditions, and evaluation results of the rolled joined body of Reference Example 1-7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

Le but de la présente invention est de fournir un corps assemblé au rouleau qui fait preuve d'une excellente rigidité à la flexion. À cet effet, la présente invention concerne un corps assemblé au rouleau comprenant une couche d'acier inoxydable et une couche d'alliage d'aluminium, la dureté Vickers A (HV) de la couche d'acier inoxydable et le rapport B (%) de l'épaisseur de la couche d'acier inoxydable par rapport à l'épaisseur du corps assemblé au rouleau satisfaisant la formule (I) : (226-0,66×A)/(0,028×A-2,2) ≤ B < 100.
PCT/JP2018/013182 2017-03-29 2018-03-29 Corps assemblé au rouleau WO2018181688A1 (fr)

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JP2017246862A JP6382435B1 (ja) 2017-06-20 2017-12-22 圧延接合体

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Publication number Priority date Publication date Assignee Title
JP2000312979A (ja) * 1999-04-30 2000-11-14 Sumitomo Special Metals Co Ltd アルミニウム・ステンレス鋼クラッド材およびその製造方法
JP3092598U (ja) * 2002-09-05 2003-03-20 磐田電工株式会社 小型電子機器等に用いる金属クラッド材
JP2004243360A (ja) * 2003-02-13 2004-09-02 Jfe Steel Kk 金属クラッド材の製造方法
JP2004306098A (ja) * 2003-04-08 2004-11-04 Toyo Kohan Co Ltd 硬軟積層材の製造方法および硬軟積層材を用いた部品の製造方法
JP2004306458A (ja) * 2003-04-08 2004-11-04 Toyo Kohan Co Ltd 硬軟積層材および硬軟積層材を用いた部品
JP2015164739A (ja) * 2014-03-03 2015-09-17 株式会社特殊金属エクセル 三層クラッド構造を有するリチウムイオン二次電池用端子素材を製造する方法
JP2015196179A (ja) * 2014-04-01 2015-11-09 東洋鋼鈑株式会社 金属積層材の製造方法
WO2017043360A1 (fr) * 2015-09-09 2017-03-16 新日鐵住金株式会社 Plaque de revêtement et son procédé de fabrication

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000312979A (ja) * 1999-04-30 2000-11-14 Sumitomo Special Metals Co Ltd アルミニウム・ステンレス鋼クラッド材およびその製造方法
JP3092598U (ja) * 2002-09-05 2003-03-20 磐田電工株式会社 小型電子機器等に用いる金属クラッド材
JP2004243360A (ja) * 2003-02-13 2004-09-02 Jfe Steel Kk 金属クラッド材の製造方法
JP2004306098A (ja) * 2003-04-08 2004-11-04 Toyo Kohan Co Ltd 硬軟積層材の製造方法および硬軟積層材を用いた部品の製造方法
JP2004306458A (ja) * 2003-04-08 2004-11-04 Toyo Kohan Co Ltd 硬軟積層材および硬軟積層材を用いた部品
JP2015164739A (ja) * 2014-03-03 2015-09-17 株式会社特殊金属エクセル 三層クラッド構造を有するリチウムイオン二次電池用端子素材を製造する方法
JP2015196179A (ja) * 2014-04-01 2015-11-09 東洋鋼鈑株式会社 金属積層材の製造方法
WO2017043360A1 (fr) * 2015-09-09 2017-03-16 新日鐵住金株式会社 Plaque de revêtement et son procédé de fabrication

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