CN104668326B - A kind of hot stamping method of high strength steel parts capability gradientization distribution - Google Patents
A kind of hot stamping method of high strength steel parts capability gradientization distribution Download PDFInfo
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- CN104668326B CN104668326B CN201510096852.XA CN201510096852A CN104668326B CN 104668326 B CN104668326 B CN 104668326B CN 201510096852 A CN201510096852 A CN 201510096852A CN 104668326 B CN104668326 B CN 104668326B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000010959 steel Substances 0.000 title claims abstract description 27
- 238000009826 distribution Methods 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000010791 quenching Methods 0.000 claims abstract description 18
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 17
- 230000000171 quenching effect Effects 0.000 claims abstract description 15
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 13
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 6
- 239000000498 cooling water Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 1
- 238000004080 punching Methods 0.000 abstract description 4
- -1 carbide Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1238—Flattening; Dressing; Flexing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/003—Cementite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Heat Treatment Of Articles (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to the hot press-formed method of a kind of high strength steel parts performance flexibility distribution.The method is that the homogeneous plate that will warm up austenitizing first carries out locally being cooled to rapidly a certain temperature (being reduced to Ms point in 1 ~ 30s following) quenching, heat in the most again the plate of non-uniform temperature being sent into another stove, temperature 600 ~ 1000 DEG C, the time is 0.5 ~ 10min.After heating, hypo-intense region be organized as a certain amount of ferrite, tempered martensite and austenite, and remain as complete austenite structure in the microstructure of high intensity region.The plate of diverse microcosmic tissue is transferred in the mould with cooling water carry out punching press.Finally give the hot press-formed part that mechanical property is different.
Description
Technical field
The invention belongs to technical field of hot stamping and forming, be specifically related to a kind of heat stamping and shaping plate in hot forming and quenching
The control technology of front tissue non-uniform Distribution, thus realize homogeneous plate hot forming part zones of different mechanical property Flexible Control
Manufacturing process.
Background technology
The intensity (more than 1400MPa) of hot press-formed part Yin Qigao and good forming property are in automotive safety structure
Part obtains and is widely applied.But intensity is too high, elongation percentage is relatively low, greatly reduces the collision performance of drip molding.In order to
On the premise of ensureing vehicle safety and alleviating weight, improve the collision performance of hot forming part, it is therefore desirable to improve drip molding special
Determine the elongation percentage at position.The method of existing raising hot forming part local elongation percentage has significant limitation.Such as Chinese patent is public
The number of opening is: CN102554048 A, CN 202555724 U, the CN 102212742 technology described by B, is all by interfering mould
Heat transfer process between tool and plate, the zones of different cooldown rate controlling plate in forming process is different, thus obtains
Different intensity, but these methods realize difficulty relatively greatly, need to change original Design of Dies, and technology stability is poor, transition
District's unstable properties, die life is relatively low.
Chinese patent CN102994737 A discloses and " regulates the side of part strength distribution during a kind of high-strength steel material forming
Method ", the local of plate is heated by the method mainly by heater；Then air cooling is to room temperature；Finally by local
High-strength steel plate after reason is placed in mould and forms, it is thus achieved that the high-strength steel part of intensity gradientization distribution.This process
In punching course, plate is cold conditions；Therefore this kind of method cannot be to solving quenching after heat punching press plate (tensile strength 1400MPa
Cold stamping above) shapes.
Chinese patent CN103317033 A discloses " the shaping side of a kind of customizable super-high strength steel hot part intensity
Method ", the method is to utilize electrically heated heat characteristic: heat uneven, different by controlling the cross section of plate zones of different,
Plate diverse location heating-up temperature can be realized different under conditions of the electric energy that input steel plate is total is certain；Thus complete in punching press
After obtain different intensity and moulding.But this kind of method needs to change original design of blank, needs change blank deliberately
Shape, cause forming property to reduce.
Chinese patent CN103878237 A discloses " method of a kind of high-strength steel hot press-formed part processing ", the party
Method is the annealing that the mode utilizing sensing heating carries out local to the performance homogeneous high intensity part after shaping quenching, thus improves
The method of the elongation percentage at this position.The method needs particular design load coil, and during Quench heating, part can be sent out
Change shape.
Summary of the invention
It is an object of the invention to as overcoming above-mentioned deficiency of the prior art, it is provided that one does not change original mould and sets
Meter, is easily controlled, and is suitable for industrialized production, and can realize the height of high-strength steel hot forming part zones of different mechanical property flexibility distribution
The hot stamping method of intensity steel parts capability gradientization distribution.
A kind of hot stamping method of the high strength steel parts capability gradientization distribution of the present invention:
First, heat steel is to complete austenitizing；
Then, the steel of complete austenitizing were first carried out within 1 ~ 30s time local softening district and are quenched to below Ms point,
Making this local softening district is austenite and martensitic structure state, and the tissue of remaining high intensity region is still austenite group
Knit；
Again the steel entirety of uneven microstructure is heated so that the microstructure in local softening district is changed into and comprises
The line and staff control of ferrite, carbide, tempered martensite and austenite, and the microstructure of high intensity region is austenite group
Knit；
After finally again heating the sheet metal forming obtained, the microstructure in local softening district is ferrite, carbonization
Thing, tempered martensite and the line and staff control of fresh martensite, and high intensity region be organized as homogeneous fresh martensitic structure.
Such scheme farther includes: heating-up temperature when again heating 600 ~ 1000 DEG C, and the heat time is 0.5 ~
10min。
The quenching of local softening district uses flow media injection apparatus or the flat-die quenching mould with cooling water to carry out.
The preferred plate of described steel, the drop stamping including 22MnB5,22MnB, 22SiMn2TiB type boracic annealed condition becomes
Shape plate, and martensitic stainless steel material and the hot press-formed plate of not boracic.
Advantages of the present invention and having the beneficial effect that:
1, mode of heating uses stove at the bottom of existing roller or the heating of batch-type furnace entirety, it is not necessary to develops and special adds hot charging
Putting, industrialization easily realizes.
2, method does not change original principle of mould design, reduces the difficulty of Design of Dies, it is easy to industrialization.
Although 3, this invention adds the cost again heated, but industrial production efficiency is high, does not affect current life
Runoff yield journey.
4, the parts of the method processing, it is achieved the mechanical performance gradient of high-strength steel hot forming part zones of different so that
Automobile improves the elongation percentage of specific region on the premise of ensureing security, thus improves the comprehensively collision property of thermoformed parts
Can, finally improve the comprehensive collision performance of automotive safety structural member.
Accompanying drawing explanation
Fig. 1 is an embodiment of the present invention, i.e. flow media selective hardening obtain before hot press-formed quenching non-homogeneous
The schematic diagram of structural state plate；
Fig. 2 is another kind embodiment of the present invention, non-homogeneous group before i.e. mould selective hardening obtains hot press-formed quenching
Knit the schematic diagram of state plate.
In figure: 1,8-heating furnace I (stove at the bottom of roller or batch-type furnace)；2,9-steel plate plate；3,10-local softening (quenching) district
(hypo-intense region)；4,11-high intensity region；5-flow media injection apparatus；6, the non-homogeneous plate of 13-；7,14-heating furnace II
(stove at the bottom of roller or batch-type furnace)；12-is with the flat-die quenching mould of cooling water.
Detailed description of the invention
The concrete scheme of the present invention is:
A: the plate (1 ~ 30s) within a certain period of time that will warm up complete austenitizing first carries out selective hardening, softened zone
Be quenched to below Ms point so that softened zone be organized as austenite+martensite, and the tissue of high intensity region is still austenite group
Knit.
B: carry out the plate entirety again of the uneven microstructure obtained in step A heating (heating-up temperature 600 ~ 1000 DEG C,
Heat time is 0 ~ 10min) so that the microstructure of softened zone is changed into ferrite, carbide, tempered martensite and Ovshinsky
Body, and the microstructure of high intensity region remains as austenite.
C: the non-homogeneous pretreatment microstructure of plate for obtaining in step B, stamping after, hypo-intense region
Microstructure is: ferrite, carbide, tempered martensite and fresh martensite, and being organized as of high intensity region is homogeneous new
Fresh martensitic structure.Thus obtain the hot press-formed part of mechanical property flexibility distribution.
Example one
As it is shown in figure 1, the present invention selects flow media to carry out selective hardening, its detailed description of the invention is as follows:
1, the drop stamping sheet material of rolled, cold rolling state or annealed state is introduced in heating furnace I, is heated to complete Ovshinsky
Body (such as Fig. 1, first stage)；
2, after having heated, enter through a flow media injection apparatus (can spray water, the medium of the mobility such as nitrogen)
Row local cooling (such as Fig. 1 second stage, utilizes normal-temperature water to quench, is quenched to 25 DEG C of left sides of room temperature in 5s to Ms point
Right).
3, non-homogeneous plate enters heating furnace II and carries out heating and be incubated and (such as Fig. 1 phase III, in 930 DEG C of stoves, add
The heat time is 55s).
4, the non-homogeneous plate after being incubated is transferred to forcing press and carries out hot press-formed quenching, obtains mechanical property flexibility and divides
The hot press-formed part of cloth.
Example two
As in figure 2 it is shown, if the present invention selects non-current medium (mould) to quench, its detailed description of the invention is as follows:
1, the drop stamping sheet material of rolled, cold rolling state or annealed state is introduced in heating furnace I, is heated to complete Ovshinsky
Body (such as Fig. 2, first stage)；
2, after having heated, the flat-die with cooling water under forcing press carry out local cooling to below Ms point (as
Fig. 2 second stage, mold face temperature is room temperature 25 DEG C, pressurize 10s, and plate mold clearing temperature is reduced to about 150 DEG C).
3, non-homogeneous plate enters heating furnace II and carries out heating or be incubated (such as Fig. 2 phase III, at 930 DEG C of holding furnaces
In, temperature retention time is 45s).
4, the non-homogeneous plate after being incubated is transferred to forcing press and carries out hot press-formed quenching, obtains mechanical property flexibility and divides
The hot press-formed part of cloth.
The steel plate materials related in the embodiment of the present invention is mainly 22MnB5,22MnB, 22SiMn2TiB type boracic annealing shape
The hot press-formed plate of state, and some martensitic stain less steels (such as SL410) and the hot press-formed plate of some not boracics.
The plate of uniform complete austenitizing in the present invention, in low-intensity, the region of high-elongation needs to carry out local
Quenching (is reduced to Ms point following), sets suitable hardening heat according to the needs of intensity and elongation percentage.
The present invention needs the plate of selective hardening carries out overall heating again, needs to set reasonably according to mechanical property
Heating-up temperature and heat time.
Claims (4)
1. the hot stamping method of a high strength steel parts capability gradientization distribution, it is characterised in that:
First, heat steel is to complete austenitizing；
Then, the steel of complete austenitizing are first carried out local softening district at 1 ~ 30s and be quenched to below Ms point so that this local
Softened zone is austenite and martensitic structure state, and the tissue of remaining high intensity region is still austenite structure；
Again the steel entirety of uneven microstructure is heated so that the microstructure in local softening district be changed into comprise iron element
The line and staff control of body, carbide, tempered martensite and austenite, and the microstructure of high intensity region is austenite structure；
After finally again heating the sheet metal forming obtained, the microstructure in local softening district is ferrite, carbide, returns
Fire martensite and the line and staff control of fresh martensite, and high intensity region be organized as homogeneous fresh martensitic structure.
The hot stamping method of high strength steel parts capability gradientization the most according to claim 1 distribution, its feature exists
In: heating-up temperature when again heating 600 ~ 1000 DEG C, the heat time is 0.5 ~ 10min.
The hot stamping method of high strength steel parts capability gradientization the most according to claim 1 and 2 distribution, its feature
It is: the quenching of local softening district uses flow media injection apparatus or the flat-die quenching mould with cooling water to carry out.
The hot stamping method of high strength steel parts capability gradientization the most according to claim 1 and 2 distribution, its feature
It is: described steel plate includes the hot press-formed plate of 22MnB5,22MnB, 22SiMn2TiB type boracic annealed condition, with
And martensitic stainless steel material and the hot press-formed plate of not boracic.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510096852.XA CN104668326B (en) | 2015-03-05 | 2015-03-05 | A kind of hot stamping method of high strength steel parts capability gradientization distribution |
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| CN201510096852.XA CN104668326B (en) | 2015-03-05 | 2015-03-05 | A kind of hot stamping method of high strength steel parts capability gradientization distribution |
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| CN104668326B true CN104668326B (en) | 2016-08-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020080486A1 (en) * | 2018-10-18 | 2020-04-23 | Neturen Co., Ltd. | Hot stamping method and hot stamped product |
| WO2020080487A1 (en) * | 2018-10-18 | 2020-04-23 | Neturen Co., Ltd. | Hot stamping method and hot stamped product |
| JP7372787B2 (en) | 2018-10-18 | 2023-11-01 | 高周波熱錬株式会社 | Hot press forming method and hot press forming product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3473735B1 (en) * | 2016-06-20 | 2024-01-10 | Easyforming Steel Technology Co., Ltd. | Treatment process for obtaining graded performance and member thereof |
| CN106086648B (en) * | 2016-07-22 | 2017-10-24 | 大连理工大学 | A method to realize the performance gradient distribution of medium manganese steel parts with TRIP effect |
| CN106119688B (en) * | 2016-07-22 | 2017-11-10 | 大连理工大学 | A preparation method of high-strength Q&P steel parts with performance gradient distribution |
| JP6424195B2 (en) * | 2016-11-14 | 2018-11-14 | 株式会社豊田中央研究所 | Hot press forming method |
| CA3050217A1 (en) * | 2017-01-17 | 2018-07-26 | Nippon Steel & Sumitomo Metal Corporation | Hot stamped part and manufacutring method thereof |
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| ES2761918T3 (en) * | 2009-08-06 | 2020-05-21 | Nippon Steel Corp | Steel sheet for radiation heating, manufacturing method thereof, and processed steel product having a portion with different strength and manufacturing method thereof |
| JP5740099B2 (en) * | 2010-04-23 | 2015-06-24 | 東プレ株式会社 | Manufacturing method of hot press products |
| WO2012085256A2 (en) * | 2010-12-24 | 2012-06-28 | Voestalpine Stahl Gmbh | Method for producing hardened structural elements |
| JP5644520B2 (en) * | 2011-01-12 | 2014-12-24 | 新日鐵住金株式会社 | Radiation heat transfer heating metal plate and method for manufacturing the same, processed metal product having different strength portions, and method for manufacturing the same |
| CN103409613B (en) * | 2013-08-30 | 2014-09-10 | 上海交通大学 | Method for realizing gradient property distribution of hot stamping workpiece |
| CN103878237B (en) * | 2014-03-24 | 2015-04-15 | 华中科技大学 | Method for machining high-strength steel hot stamping formed parts |
| CN103934360A (en) * | 2014-04-25 | 2014-07-23 | 吉林大学 | Hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel |
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- 2015-03-05 CN CN201510096852.XA patent/CN104668326B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020080486A1 (en) * | 2018-10-18 | 2020-04-23 | Neturen Co., Ltd. | Hot stamping method and hot stamped product |
| WO2020080487A1 (en) * | 2018-10-18 | 2020-04-23 | Neturen Co., Ltd. | Hot stamping method and hot stamped product |
| JP7372787B2 (en) | 2018-10-18 | 2023-11-01 | 高周波熱錬株式会社 | Hot press forming method and hot press forming product |
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| CN104668326A (en) | 2015-06-03 |
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