JPS5924593A - Diffusion bonding method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for diffusion bonding a cemented carbide sintered alloy that fully utilizes an N4-P alloy and an iron base material.

Wear-resistant parts made of cemented carbide sintered alloys, especially punches and dies for punching dies, are generally made of cemented carbide in one piece, which is difficult to process, so drilling and screwing are difficult. Machining is done by electrical discharge machining. However, this method requires +X machining man-hours and is inefficient.

Further, only the necessary parts of the punch and die need to be made of cemented carbide, and there is a problem in using a cemented carbide sintered alloy integrally from the viewpoint of saving tungsten resources.

On the other hand, as a method for joining cemented carbide and iron base materials, there is generally a brazing method using a torch, high frequency heating, etc.
J-row and Cu-row are used, but especially when joining a wide area, it is not possible to uniformly braze the brazed layer with one bubble. In addition, the shear strength of the brazed layer is 10 to 20
kq/ma, there is a drawback that the cemented carbide sintered alloy separates due to residual stress after joining. Furthermore, what was obtained by performing a low example using Af low or Cu low? When processing by the wire cutting method, there is also a drawback that wire cutting noise is produced due to the flux components contained in these waxes.

The present invention aims to provide a complete joining method that eliminates all of the above-mentioned drawbacks. ~
Ni-P alloy powder containing 16% mixed with a total organic solvent and made into a paste* [1.02 to 0.07
After coating the joint surface of the cemented carbide sintered alloy or iron-based base material at a ratio of fllcd, the above-mentioned both materials were heated at 1000°C to 1150°C in a non-oxidizing atmosphere while applying a mechanical load.
This diffusion bonding method is characterized by heating for 60 to 90 minutes.

Here, sintered cemented carbide refers to all cemented carbide alloys that are tough and contain a large amount of WC, GO1Ni, etc. as a binder, and have excellent wear resistance.
All types of ferrous base materials shall be used, including ordinary steel, special purpose steel such as tool steel and stainless steel, cast iron, and cast steel, and various types shall be used depending on the purpose. Ni--P alloy powder with a composition of 9 to 13% P in a low melting point range and a particle size of 400 mesh or less is used. As an organic solvent, is the method used in this application lower than methylceta? This section describes a series of experiments conducted during development and their results.

'NG -18Go' -2,5 as a cemented carbide sintered alloy
TaC (consisting of D composition 25 x 25 x 5.3
t (am) shape, 25 X as iron-based material
25 x 25 t (am) shape C7) SK-5 (
G: 1.0, Si (0,35, Mn<
0.50, P < 0.03, S < 0.03%J,
As the N1-P alloy powder, powders of 400 mesh or less containing a total weight ratio of P -12.0% were selected, and the bonding conditions were adjusted by adjusting the bonding temperature, bonding time, bonding atmosphere, bonding material, amount of Ni -2 alloy powder, etc. Impact＠Complete investigation. The effects of each bonding condition on the bonding condition will be discussed below.

Figure 1 shows WC-1 when carrying out the entire series of experiments.
8Go-2,5TaC cemented carbide (hereinafter referred to as 051:IT), 5K-3, N4-P alloy powder. In the figure (11G! 5K-5, (21cs NIP)
Alloy powder, (3) GI G 50T? Each is shown. or,
Table 1 [Basic bonding conditions and investigated bonding conditions]However, when investigating one bonding condition, the basic bonding conditions were set to other conditions.

Table 1 Among the investigation items shown in Table 1, the bonding temperature was 900°C and 95°C.
0°C, 1000°C, 1050°C, 1100°Q, 1
What is the bonding strength at 150℃ and 12'OO℃? Shown in Table 2. As shown in Figure ζG, the joint strength is measured by applying the full load W after joining, and the total load when separated between C30T and 5K-3. Note that the values of bonding strength below are the average values of five values.

Table 2 When the bonding temperature is below 950℃, the bonding strength is weak (,900℃
The following will not be joined at all. Furthermore, if the bonding temperature exceeds 1200° C., the N1-P alloy will corrode 5K-3, making it impossible to obtain a good bonding condition. From this G, the junction temperature is 1
It was found that the temperature between 000°C and 1150°C is best.

Table 6 shows the holding times during bonding for 10 minutes, 30 minutes, and 60 minutes.
The bonding temperature is 1 contact for 1 minute, 90 minutes, and 120 minutes. It can be seen that when the holding time is set to 3D to 90 minutes, a good bonding state can be obtained. If the holding time was shorter than 30 minutes, Gl bonding was not performed, and if the holding time was longer than 90 minutes, Cr50T remained after bonding (due to the mental force G, Cr50T was released).

Table 5 Table 4 shows the bonding atmosphere in full vacuum, 1O-2torr, 10
The bonding strength in 'torr, hydrogen, and argon is divided, but in these atmospheres, the bonding strength is 25ky.
A bonding strength of ,/- or more was obtained.

Table 4 Table 5 N1-P alloy powder to be applied to joint surface O, i'
001.0.02.003.0.07.0.1 respectively
, +7/CJI+. N
1-P alloy powder punch is 0.011/c+d.

And, 0.117c is not joined at all, 0.02
Good bonding strength was obtained in the range of ~007F//c+4.

Moreover, the surface roughness of the bonding surface of G5oTSSK-1 before bonding was Rmax: 2 to 3 μmf, and the best bonding condition was obtained.

As mentioned above, as a result of conducting a series of experiments on bonding G5oT and 5K-3, it was found that the best bonding conditions are as shown in Table 6.

Table 6 Under the joining conditions shown in Table 6, W C-
14Go-2,5TaC, W C-22Co, iron base material and 5KD-11,5US304 stainless steel, F
25G cast iron was fully returned, and as a result of all the joints performed in each combination, a good joint state was obtained in all cases.

Furthermore, similarly good bonding conditions were obtained under the conditions shown in Table 6 when using any of methylcellulose, turpentine oil, and pine oil as the organic solvent.

Next, (G50T) - (
SK-6) All joints E, P, M, A
, & was investigated, and it was found that no pinholes were observed in the joint, and that W, Fe, Ni, and P1 were well diffused into each other. It is thought that these facts led to the high joint strength (25 kg/IIIJ or more).

Below are examples of the claimed invention? show.

<Example 1> 50 x 50 x 5.5 t (mmJ) cemented carbide GsoT type, 50 x 50 x 50 t (mm) iron-based Ao 5K-5 type, temperature 1100°C holding time 6
After bonding under the bonding conditions of 0 minutes, vacuum (1D' torr), and N1-P alloy coating amount of 0.031/cnl, wire-cut electric discharge machining method (Q) was used to complete the fabrication of φ10 punches and punching dies. A cold-rolled steel plate (SPC-0 type) with a thickness of 10 mm was subjected to stamping with a total clearance of 7%. No abnormalities were observed in the joints of the punched sheets @ 30,000 sheets, and no abnormalities such as cracks in the cemented carbide G50Tc were observed.

As described above, according to the method of the present application, it is possible to join a wide area of cemented carbide and iron base material, and the joint part is
Fe, N1, and P diffuse well into each other, and the bonding strength is 2.
5, more than 97mA can be obtained. The obtained bonded product does not cause wire breakage even when using the wire cut discharge 1111 method, and can be easily drilled into iron base materials and screwed. For these reasons, this is an effective method for manufacturing parts such as the punch 1 die, in which only the parts that require wear resistance are made of carbide, and the other parts are made of iron-based material that is easy to process.

[Brief explanation of the drawings] Figure 1 is an explanatory diagram of the diffusion bonding preparation method 0 Figure 2 C1 is an explanatory diagram of the bonding strength measurement method Gold W Load Patent Applicant Japan Tungsten Co., Ltd. Figure 1 ↑ Procedural Amendment January 1981 7FJ Special YI Agency Director Wakasugi Wanu 1 Matter 1'1. Indication of 1981 Note No. 133510 2, Name of the invention L1, Diffusion bonding method: 3.1ilijl process ('1. L/L section with Applicant address Name Nikki Tungsten Co., Ltd.) Company 4, agent G1 + li i [', subject c3) outside 58) ri L name and rkrnoda
N-1 Risanru Vs”-Matasuyama-yo-55-Details
Book 1, title of the invention Wear-resistant part key and its? Il manufacturing method 2, claim 1, N1- containing 9 to 13 weight percent of P on an iron base material
A cemented carbide layer exists through the p alloy layer, and the above N1
- A wear-resistant member characterized in that the P alloy is in a diffusion bonded state with both the iron-based key and the cemented carbide layer. 2. When joining a cemented carbide sintered alloy mainly composed of WC and an iron base material, N1- containing 9 to 13% of ■)
2 alloy powder is mixed with an organic solvent to form a paste and applied at a ratio of 0.02 to 0.07 g/crK to the joint of the cemented carbide sintered alloy or iron base material, and then the two materials are mixed. 1. A method for manufacturing a wear-resistant member, which comprises heating the layers at 1000 DEG C. to 1150 DEG C. for 30' to 90 minutes in a non-oxidizing atmosphere while applying a load. 3. Detailed Description of the Invention The present invention relates to a wear-resistant key such as a punch or a gouer, and a method for manufacturing the same. Although cemented carbide integral parts are generally used for these fiJ abrasion materials, machining is difficult, so drilling and screw machining are done by 7I3 mold machining, which requires a large number of machining steps and is inefficient. By the way, in many of these wear-resistant parts, only the parts that require wear resistance need to be made of cemented carbide, and from the perspective of saving tungsten resources, it is not desirable to use cemented carbide in one piece. . As a method for joining cemented carbide and iron base materials, there are generally brazing methods using a torch, high-frequency heating, etc., and heg brazing and Cu brazing are used, but this method is particularly useful for joining large areas. Otherwise, air bubbles will form in the brazing layer, making it impossible to braze uniformly. In addition, the shear strength of the brazed layer is 10 to 20k.
g/w', there is a drawback that the cemented carbide sintered alloy may come off due to residual stress after joining. Furthermore, when a material obtained by brazing with He90- or CUL-1- or the like is processed by a wire cutting method, there is a drawback that wire breakage occurs due to the flux component contained in the brazing. The present invention aims to provide a wear-resistant member and a method for manufacturing the same that eliminates the above-mentioned drawbacks. A wear-resistant member and WC characterized in that a cemented carbide layer exists between the layers, and the N1-P alloy is in an extended bonding state with both the iron base material and the cemented carbide layer. When joining a cemented carbide sintered alloy mainly composed of P to an iron base material, Ni-P alloy powder containing 9 to 13% P is mixed with an organic solvent and made into a paste. 0.02-
Top i at the rate of 0.07g/cwt! If after applying it to the joint surface of hard sintered alloy or iron base material, use the above art material wood!
(1) in a non-oxidizing atmosphere while applying a load.
This is a method for producing a muddy wear-resistant member, which is characterized by heating at 000° C. to 1150° C. for 30 to 90 minutes. Here, sintered cemented carbide refers to a tough cemented carbide whose main component is WC and a large amount of 60% N1 as a binder, and which has wear resistance. In addition, all kinds of iron base materials are used, such as special purpose materials such as special purpose steel, tool steel and stainless steel, 8 iron, and hook planes, and are classified into various types depending on the purpose.N1- The P alloy powder used has a low melting point P content of 9 to 13% by weight and a particle size of 400 mesh or less.As the organic solvent, methyl cellulose, turpentine H11, pine oil, etc. are used. The load applied during heating is 30F, / ct
shall be. Below, a series of experiments conducted to develop the present invention and their results will be described. 25X 25X 5.3t (mm+ shape) made of WC-18Co 2.5TaC as a cemented carbide sintered alloy, T25X25X25t (nun) as an iron-based material
) (7) Shape 0) 5K-3 (C: 10°Si<
0.35, Mn<0.50, P<0.03, S<0.0
3%), as N1-P alloy powder, P is 12.0%
Each powder containing 400 meshes or less was selected, and the influence of bonding temperature, bonding time, bonding atmosphere, bonding material, N1-P alloy powder temperature, etc. on the bonding condition was investigated. Below, we will discuss the bonding state under each bonding condition [J]. Figure 1 shows the WC-18 used in the above series of experiments.
The figure shows the bonding diagram of c'o-2,5TaC cemented carbide (hereinafter referred to as G50T), 5K-3, and N1-P alloy powder. In the figure, (1) shows 5K-3, (2) shows N1-P alloy powder, and (3) shows G50T. Further, Table 1 shows the basic bonding conditions and the investigated bonding conditions, but when investigating one bonding condition, the other conditions were set as the basic bonding conditions. Table 1 Among the investigation items shown in Table 1, the bonding temperature was 900℃, 95℃.
0℃, 1000℃, 1050℃, 1100℃, 1150
℃ and 1200℃, the respective bonding strengths are the second
Shown in the table. As shown in Figure 2, the bonding strength was determined after bonding.
It was measured by applying a load W and shows the load when it separated between G50T and 5K-3. Note that the values of bonding strength below are the average values of five values. At bonding heights below 950℃, bonding strength is weak;
The following will not be joined at all. Also, if the bonding temperature is 1200℃ or higher (if this happens, the N1-P alloy will corrode 5K-3 and a good bonding condition will not be achieved by ITJ. As a result, the bonding temperature will be
It was found that 1000°C to 1150°C is best. The bonding strength is shown for 60 minutes, 90 minutes, and 120 minutes. It can be seen from this that a good bonding state is exhibited when the holding time is 30 to 90 minutes. If the holding time was shorter than 30 minutes, no bonding was performed, and if it was longer than 90 minutes, G50T separated due to residual stress after bonding. Table 3: Bonding strength when held in hydrogen or argon. As shown, l
liu (1) Atmosphere ffJ4AR: Oite Lt, Zente 2
A bonding strength of 5 kHz/++mi' or more was obtained. Table 4 and Table 5 show the details of the N1-P alloy powder applied to the joint surface.
．． 01.0.02.0.03.0.07, o, 1g/c
This shows the bonding strength when A is set. When the N1-P alloy powder was 0.01 g/cJ and 0.1 g/c, no bonding occurred at all, and good bonding strength was obtained in the range of 0.02 to 0.07 g/cf. Table 5 Also, regarding the surface roughness of the bonded surfaces of G50T and 5K-3 before bonding, the best bonding condition was obtained at Rmax: 2 to 3 μm. As mentioned above, as a result of a series of experiments on bonding G50T and 5K-3, it was found that the best bonding conditions are as shown in Table 6. Under the bonding conditions shown below, WC-1 was bonded as a cemented carbide.
4Co-2, 5TaC, WC-22Co, 5KD-11, 5US304 stainless steel, F25C as iron base material
#Choose iron and join each pair 1: Result,
In all cases, a good bonding state was obtained. Furthermore, similarly good bonding conditions were obtained under the conditions shown in Table 6, regardless of whether cellulose, turpentine, or pine ilb was used as the organic solvent. Next, CG50T)-(S
The state of the joint of K-3) was investigated by E, P, M, ^, and the photographs shown in Figure 3 and below are the photographs shown in Figure 3 and below. 7 figures are each W
This is a characteristic X-ray image of , Fe, Ni, and P, and it can be seen that each of them is well diffused into each other. These facts result in high joint strength (25kg/mm
The above) can be considered to have been obtained. Examples of the present invention are shown below 1゜〈Example 1〉 50X 50X 5.5t (mm+) cemented carbide G5or
aff and 50X50X50t (mm+ iron base material SK
-3g and l crystallinity 1100℃ holding time 60 minutes in vacuum (10torr) NiP alloy coating amount 0.03g
/ After bonding under the bonding conditions of C, wire cut)・
A φ10mm punch and punching die were manufactured using the electrical discharge machining method, and cold rolled 3N plates (5pcs) with a thickness of 1.0mm were manufactured.
-C type) was punched with a clearance of 7%. Even though 30,000 sheets were punched, no abnormalities were observed in the joints, and no defects such as chips were observed in the cemented carbide G50T. According to the method of the present invention, it is possible to join a wide area of cemented carbide and iron base material, and the joint part is made of W.
, Fe, Ni, and P are mutually multiplied by J, < spread stripe joint strength, 25 kg/mmL or less. Hangable wear-resistant members do not cause wire breakage even when using the wire cutter electric discharge machining method, and can be easily drilled and screwed into iron base materials. For these reasons, for example, only the parts that require wear resistance, such as punching bunches and gouers, are made of carbide, and the other parts are made of iron-based materials that are easy to process. This is an effective method. 4. Brief explanation of the drawings Fig. 1 is an explanatory diagram of the preparation state of the method for manufacturing the wear-resistant part oil of the present invention, Fig. 2 is an explanatory diagram of the method for measuring the joint strength, and Figs. 3 to 7 are respectively E of the joint part of the front month for wear resistance of the present invention,
Dimensions indicate P, M, 8. In the figure, (1) J iron base metal + 2) iNi P alloy powder (3) ! i Written amendment (voluntary) January 28, 1980 Kazuo Wakasugi, Commissioner of the Patent Office 1. Indication of the case 1988 Patent Application No. 133510 2. Name of the invention Diffusion bonding method 3. Person making the amendment Relationship to the case Patent Applicant address Name Hiki Tungsten Co., Ltd. (1) jc+to in the 10th line of the 4th page in the full text of the amended specification attached to the procedural amendment filed on January 7, 1985.
J to jC! Correct it to 1.0.

Claims (1)

[Claims] /, G-button that completely joins the cemented carbide sintered alloy mainly composed of WCv and the iron base material, N1-P alloy powder containing 9 to 13% by weight of PTh was mixed with an all-organic solvent and made into a paste. After applying the above-mentioned cemented carbide sintered alloy or the joining surface of the iron base material at a ratio of t'0.02 to 0.079/cm,
Load for all types of both materials above? 1. A diffusion bonding method characterized by heating in a non-oxidizing atmosphere at 1000 DEG C. to 1150 DEG C. for 30 to 90 minutes.