CN109570312A - A kind of super-high strength steel auto parts thermoforming process - Google Patents
A kind of super-high strength steel auto parts thermoforming process Download PDFInfo
- Publication number
- CN109570312A CN109570312A CN201811438732.3A CN201811438732A CN109570312A CN 109570312 A CN109570312 A CN 109570312A CN 201811438732 A CN201811438732 A CN 201811438732A CN 109570312 A CN109570312 A CN 109570312A
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- Prior art keywords
- temperature
- embryo material
- furnace
- cooled
- auto parts
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Classifications
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- 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
- B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts
-
- 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
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrochemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of super-high strength steel auto parts thermoforming process, comprising the following steps: embryo material is placed in intermediate frequency furnace, heating；Stamping die preheating, embryo material, which is placed in mold, carries out punching press；Press machine carries out pressure maintaining, until the part in mold is cooled to 180-200 DEG C, press machine drives upper mold uplink；Embryo material is taken out, is placed in room temperature and naturally cools to 50 DEG C or less；Embryo material, which is placed in electrolyte, to carry out electrochemical deburring, descales；Carburizing, nitriding；It takes out, is post-processed, obtain final auto parts.The problem of present invention realizes the punching press of auto parts by drop stamping mode, can effectively solve the problem that punching press crackle, to improve product qualification rate；By carburizing and nitriding, the surface hardness and wearability of part can be effectively improved.
Description
Technical field
The invention belongs to automate processing technique field, and in particular to a kind of super-high strength steel auto parts thermoforming process.
Background technique
With world steel industrial expansion, high-intensitive, ultrahigh-strength steel plates are increasingly by various countries automaker's
Concern.But the major automobile factory in the whole world all applications at present original cold stamping manufacture vehicle body and part, because high-strength steel sheet
Intensity is high, and in cold stamping, required power is very big, when have crackle and rebound is fairly obvious, especially tensile strength is greater than
The high-strength steel sheet (ultrahigh-strength steel plates be greater than 700MPa) of 550MPa in punching press both defects with regard to especially prominent.Hot forming
The physicochemical properties of technology utilization material carry out high intensity/ultrahigh-strength steel plates punching press under the conditions of influence of high austenizing temp, real
Ready-made shape is synchronous with heat treatment, finally significantly improves the intensity of workpiece.The hot forming of high strength steel solves high-strength steel cold
The problem of processing and rebounding after cold working is difficult under state.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of super-high strength steel auto parts thermoforming is provided
Technique.
The present invention is achieved by the following technical solutions:
A kind of super-high strength steel auto parts thermoforming process, which comprises the following steps:
S1, embryo material are placed in intermediate frequency furnace, are heated to 900-920 DEG C with 100-120 DEG C of heating rate, then be cooled to 810-
820 DEG C of heat preservation 1-1.5h are being heated to 930-940 DEG C with 100-120 DEG C of heating rate, are keeping the temperature 8-11s；
S2, stamping die are preheated to 280-300 DEG C, and manipulator takes out embryo material out of intermediate frequency furnace, are placed in mold, manipulator
It exits, press machine is actuated for punching press；
S3, press machine carry out pressure maintaining, until the part in mold is cooled to 180-200 DEG C, press machine drives upper mold uplink；
S4, manipulator are removed from the molds embryo material, are placed in room temperature and naturally cool to 50 DEG C or less；
S5, embryo material, which are placed in electrolyte, to carry out electrochemical deburring, descales, and electrochemical deburring, descale time 1-
2min, electrolyte temperature are 30-40 DEG C；
S6, embryo material are placed in carburizer, are warming up to 720-740 DEG C with 150-170 DEG C of heating rate, are kept the temperature 0.5-1.5h, with
180-200 DEG C of heating rate heating, 720-750 DEG C of nitrogen is passed through into furnace, methanol is constantly instilled into furnace, until furnace
Temperature reaches 900 DEG C, stops the injection of nitrogen, and methane is injected into furnace, and is passed through acetone or ethyl acetate, until furnace temperature reaches
930 DEG C, 3-4h is kept the temperature, is cooled to 490-510 DEG C with 100-120 DEG C of rate of temperature fall, is passed through ammonia gas mixture displacement, keep the temperature 8-
10h is warming up to 550-570 DEG C, keeps the temperature 12-16h, is cooled to 500-530 DEG C, keeps the temperature 8-10h, stops heating, naturally cold in furnace
But it comes out of the stove to 180-200 DEG C, is air-cooled to room temperature；
S7, taking-up, are post-processed, and final auto parts are obtained.
Preferably, in the step S7, the step of post-processing are as follows: be heated to 820-830 DEG C, keep the temperature 2h, be cooled to 700-
730 DEG C, 2-3h is kept the temperature, then carry out electrochemistry scale removal.
Compared with prior art, the beneficial effects of the present invention are:
The problem of present invention realizes the punching press of auto parts by drop stamping mode, can effectively solve the problem that punching press crackle, to mention
High production yield；By carburizing and nitriding, the surface hardness and wearability of part can be effectively improved.
Specific embodiment
A kind of super-high strength steel auto parts thermoforming process, which comprises the following steps:
S1, embryo material are placed in intermediate frequency furnace, are heated to 900-920 DEG C with 100-120 DEG C of heating rate, then be cooled to 810-
820 DEG C of heat preservation 1-1.5h are being heated to 930-940 DEG C with 100-120 DEG C of heating rate, are keeping the temperature 8-11s；
S2, stamping die are preheated to 280-300 DEG C, and manipulator takes out embryo material out of intermediate frequency furnace, are placed in mold, manipulator
It exits, press machine is actuated for punching press；
S3, press machine carry out pressure maintaining, until the part in mold is cooled to 180-200 DEG C, press machine drives upper mold uplink；
S4, manipulator are removed from the molds embryo material, are placed in room temperature and naturally cool to 50 DEG C or less；
S5, embryo material, which are placed in electrolyte, to carry out electrochemical deburring, descales, and electrochemical deburring, descale time 1-
2min, electrolyte temperature are 30-40 DEG C；
S6, embryo material are placed in carburizer, are warming up to 720-740 DEG C with 150-170 DEG C of heating rate, are kept the temperature 0.5-1.5h, with
180-200 DEG C of heating rate heating, 720-750 DEG C of nitrogen is passed through into furnace, methanol is constantly instilled into furnace, until furnace
Temperature reaches 900 DEG C, stops the injection of nitrogen, and methane is injected into furnace, and is passed through acetone or ethyl acetate, until furnace temperature reaches
930 DEG C, 3-4h is kept the temperature, is cooled to 490-510 DEG C with 100-120 DEG C of rate of temperature fall, is passed through ammonia gas mixture displacement, keep the temperature 8-
10h is warming up to 550-570 DEG C, keeps the temperature 12-16h, is cooled to 500-530 DEG C, keeps the temperature 8-10h, stops heating, naturally cold in furnace
But it comes out of the stove to 180-200 DEG C, is air-cooled to room temperature；
S7, taking-up, are post-processed, and final auto parts are obtained.
Preferably, in the step S7, the step of post-processing are as follows: be heated to 820-830 DEG C, keep the temperature 2h, be cooled to 700-
730 DEG C, 2-3h is kept the temperature, then carry out electrochemistry scale removal.
Claims (2)
1. a kind of super-high strength steel auto parts thermoforming process, which comprises the following steps:
S1, embryo material are placed in intermediate frequency furnace, are heated to 900-920 DEG C with 100-120 DEG C of heating rate, then be cooled to 810-
820 DEG C of heat preservation 1-1.5h are being heated to 930-940 DEG C with 100-120 DEG C of heating rate, are keeping the temperature 8-11s；
S2, stamping die are preheated to 280-300 DEG C, and manipulator takes out embryo material out of intermediate frequency furnace, are placed in mold, manipulator
It exits, press machine is actuated for punching press；
S3, press machine carry out pressure maintaining, until the part in mold is cooled to 180-200 DEG C, press machine drives upper mold uplink；
S4, manipulator are removed from the molds embryo material, are placed in room temperature and naturally cool to 50 DEG C or less；
S5, embryo material, which are placed in electrolyte, to carry out electrochemical deburring, descales, and electrochemical deburring, descale time 1-
2min, electrolyte temperature are 30-40 DEG C；
S6, embryo material are placed in carburizer, are warming up to 720-740 DEG C with 150-170 DEG C of heating rate, are kept the temperature 0.5-1.5h, with
180-200 DEG C of heating rate heating, 720-750 DEG C of nitrogen is passed through into furnace, methanol is constantly instilled into furnace, until furnace
Temperature reaches 900 DEG C, stops the injection of nitrogen, and methane is injected into furnace, and is passed through acetone or ethyl acetate, until furnace temperature reaches
930 DEG C, 3-4h is kept the temperature, is cooled to 490-510 DEG C with 100-120 DEG C of rate of temperature fall, is passed through ammonia gas mixture displacement, keep the temperature 8-
10h is warming up to 550-570 DEG C, keeps the temperature 12-16h, is cooled to 500-530 DEG C, keeps the temperature 8-10h, stops heating, naturally cold in furnace
But it comes out of the stove to 180-200 DEG C, is air-cooled to room temperature；
S7, taking-up, are post-processed, and final auto parts are obtained.
2. a kind of super-high strength steel auto parts thermoforming process as described in claim 1, it is characterised in that: the step S7
In, the step of post-processing are as follows: be heated to 820-830 DEG C, keep the temperature 2h, be cooled to 700-730 DEG C, keep the temperature 2-3h, then carry out electrification
Learn scale removal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811438732.3A CN109570312A (en) | 2018-11-29 | 2018-11-29 | A kind of super-high strength steel auto parts thermoforming process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811438732.3A CN109570312A (en) | 2018-11-29 | 2018-11-29 | A kind of super-high strength steel auto parts thermoforming process |
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| CN109570312A true CN109570312A (en) | 2019-04-05 |
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| CN201811438732.3A Pending CN109570312A (en) | 2018-11-29 | 2018-11-29 | A kind of super-high strength steel auto parts thermoforming process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935803A (en) * | 2019-11-29 | 2020-03-31 | 中国华西企业有限公司 | Deformation treatment method for thick steel plate |
| CN111690961A (en) * | 2020-07-14 | 2020-09-22 | 四川轻化工大学 | Preparation of nitrogen-doped MnCr on FeCrNi alloy surface2O4Method for coating |
| US20230041423A1 (en) * | 2021-08-04 | 2023-02-09 | Bayerische Motoren Werke Aktiengesellschaft | Process and Device for Producing a Coated Structural Component |
| CN116765205A (en) * | 2023-06-06 | 2023-09-19 | 华安钢宝利高新汽车板加工(娄底)有限公司 | Thermal forming process and device for ultrahigh-strength steel automobile parts |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935803A (en) * | 2019-11-29 | 2020-03-31 | 中国华西企业有限公司 | Deformation treatment method for thick steel plate |
| CN111690961A (en) * | 2020-07-14 | 2020-09-22 | 四川轻化工大学 | Preparation of nitrogen-doped MnCr on FeCrNi alloy surface2O4Method for coating |
| US20230041423A1 (en) * | 2021-08-04 | 2023-02-09 | Bayerische Motoren Werke Aktiengesellschaft | Process and Device for Producing a Coated Structural Component |
| CN116765205A (en) * | 2023-06-06 | 2023-09-19 | 华安钢宝利高新汽车板加工(娄底)有限公司 | Thermal forming process and device for ultrahigh-strength steel automobile parts |
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Application publication date: 20190405 |