CN107245554A - A kind of manufacture method of converes instruction drop stamping steel plate - Google Patents
A kind of manufacture method of converes instruction drop stamping steel plate Download PDFInfo
- Publication number
- CN107245554A CN107245554A CN201710435191.8A CN201710435191A CN107245554A CN 107245554 A CN107245554 A CN 107245554A CN 201710435191 A CN201710435191 A CN 201710435191A CN 107245554 A CN107245554 A CN 107245554A
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- CN
- China
- Prior art keywords
- steel plate
- temperature
- quenching
- room temperature
- incubated
- Prior art date
- Legal status (The legal status 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 status listed.)
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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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/607—Molten salts
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- 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
Abstract
The present invention relates to a kind of manufacture method of converes instruction drop stamping steel plate, this method comprises the following steps：（1）By material with certain heating rate to Ac3（Austenite changes end temp）A certain temperature above is simultaneously incubated the regular hour；（2）Quench for the first time：Steel plate is transferred in punch die carry out it is hot press-formed, after the completion of water quenching to room temperature；（3）Converes instruction area is incubated：The steel plate quenched to room temperature is reheated to As（The start temperature of converes instruction formation）And Ac1（Austenite changes start temperature）Between a certain temperature and isothermal for a period of time；（4）Second of quenching：By steel plate rapid quenching to Ms（Martensite start temperature）And Mf（Martensitic traoformation end temp）Between a certain temperature and held for some time；（5）Partition：The temperature that steel plate is heated into more than Ms enters the partition of row element；（6）Third time is quenched：By steel plate quenching to room temperature.
Description
Technical field
Improve the method for drop stamping mechanical property of steel plate the present invention relates to a kind of, more particularly to a kind of converes instruction heat punching
The manufacture method of laminated steel.
Background technology
Theory analysis and result of the test all show：The lightweight of automobile is to improve the effective way of vehicle fuel economy,
Because vehicle complete vehicle weight reduction 10%, fuel efficiency can improve 6% ~ 8%；Automobile kerb weight often reduces 100kg, every hundred km
0.3 ~ 0.6L of oil consumption can be reduced, therefore, because the need for environmental protection and energy-conservation, the lightweight of automobile has become our times automobile
One main trend of development.
In the 1990s, 35 worldwide main Steel Enterprise Cooperations complete " ultralight steel Automobile
Body（ULSAB-Ultra Light Steel Auto Body）" problem.The result of study of the problem is shown：If body of a motor car
The 90% of steel plate uses the high-strength steel sheet largely produced（Including high intensity, superhigh intensity and interlayer loss of weight steel plate）, then may be used
Realize body of a motor car loss of weight 25% on the premise of production cost is not increased, and the 25% of car deadweight is in vehicle body, therefore realize vapour
Contribution of the comprehensive lightweight of car body material to energy-saving and environmental protection has very important meaning.
Although the lightweighting materials of automobile have been expanded to except AHSS（AHSS）Magnesium alloy, aluminium alloy in addition
Also plastic or other material field, or but these materials can increase considerably the production cost of automobile, otherwise it is exactly to meet not
The requirement of body of a motor car safety component mechanical property is undertaken, therefore from the point of view of the current development trend, AHSS is still a kind of
Reliably, material be easily achieved, irreplaceable automotive light weight technology, and drop stamping technique is applied in actual production
The problem of AHSS formability is poor is solved again, and therefore, AHSS still has huge in terms of the lightweight of automobile
Potentiality.But the further raising with people to requirements such as the oil consumption of automobile, environmental protection, security and comfortablenesses, AHSS performance
Be also required to further to improve with it is perfect.
The content of the invention
In view of the above-mentioned problems, the present invention propose it is a kind of by by plate in converes instruction area isothermal+Q＆P techniques and Re Chong
The manufacture method for the converes instruction drop stamping steel plate that pressure technique is combined, it is therefore an objective to which it is low to provide a kind of cost, production efficiency is high,
The method of intensity, plasticity and toughness workable and that drop stamping steel plate can be greatly improved in actual production.
To achieve these goals, the technical scheme is that：（1）Solution treatment：First by material with certain heating
Speed is heated to Ac3（Austenite changes end temp）A certain temperature above is simultaneously incubated the regular hour；（2）Quench for the first time
Fire：Then steel plate is transferred in punch die carry out it is hot press-formed, after the completion of water quenching to room temperature；（3）Converes instruction area is incubated：
The steel plate quenched to room temperature is reheated to As again（The start temperature of converes instruction formation）And Ac1（Austenite transformation starts
Temperature）Between a certain temperature and isothermal for a period of time；（4）Second of quenching：Immediately followed by by steel plate rapid quenching to Ms（Horse
Family name's body starting temperature of transformation）And Mf（Martensitic traoformation end temp）Between a certain temperature and held for some time；（5）Match somebody with somebody
Point：Then the temperature for steel plate being heated into more than Ms enters the partition of row element；（6）Third time is quenched：Finally steel plate is quenched
Fire is to room temperature.
The step（2）In be quenched into Ms and MfBetween temperature by formula VM=1-exp [a (Ms-QT)] determine, formula
Middle VMFor Martensite Volume Fraction, a is constant, depending on the composition of material, for carbon steel of the carbon content below 1.1%, a=-
0.011；Ms is martensite start temperature；QTTemperature is reached to be cooled to.The horse to be obtained in theory is first determined before quenching
Family name's body content, recycles above-mentioned formula to calculate hardening heat QT。
The step（1）~（6）In Ac3、Ac1、MS、MfAnd quenching cooling rate can accurately be determined by thermal dilatometer.
The present invention is advantageous in that：On the premise of the operability of production technology is improved, obtain one kind and contain
There is the steel plate of martensite+adverse transformation austenite+retained austenite tissue, the comprehensive mechanical property that this tissue is shown is remote
Better than the Q＆P steel of its hetero-organization, because adverse transformation austenite is reversed by martensite, its size is tiny, and uniformly
Ground disperse can improve modeling, toughness and the welding performance of steel plate in the case where not reducing timber intensity, make on martensitic matrix
Obtain this material has a greatly raising in terms of strength and ductility product and impact flexibility, while this material is also easy to production, and
Production cost is low.Therefore, if this material is widely used, it will the light weight degree to automobile has one significantly to carry
Height, also implies that automobile can more save fuel oil and environmental protection while security is not reduced, this is beneficial to improve us
Living environment.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Fig. 2 is the metallographic structure figure of embodiments of the invention 1.
Fig. 3 is the metallographic structure figure of embodiments of the invention 2.
Fig. 4 is the metallographic structure figure of embodiments of the invention 3.
In figure, 1 is solution treatment, and 2 be hot press-formed, and 3 is quench for the first time, and 4 be the insulation of converes instruction area, and 5 are
Second of quenching, 6 be partition, and 7 quench for third time, and 8 be AC3Temperature line, 9 be AC1Temperature line, 10 be As temperature lines, and 11 be Ms
Temperature line, 12 be MfTemperature line.
Embodiment
Embodiment is described in detail with reference to the accompanying drawings and examples, as shown in accompanying drawing 1 ~ 4.
Embodiment 1
The material used in actual production comprises the following steps for nickelic C-Si-Mn steel, its production process：
（1）Solution treatment：By material with certain heating rate to 950 DEG C, and it is incubated 15min.
（2）Quench for the first time：Steel plate is transferred in punch die carry out it is hot press-formed, after the completion of water quenching to room temperature.
（3）Converes instruction area is incubated：The steel plate quenched to room temperature is reheated to 700 DEG C, and isothermal 5min.
（4）Second of quenching：By steel plate, rapid quenching is to 310 DEG C in the potassium nitrate and sodium nitrate of melting and is incubated 10s,
Wherein, the volume ratio of potassium nitrate and sodium nitrate before melting is 45%：55%.
（5）Partition：Then by steel plate with 10 DEG C/min heating rate to 390 DEG C of insulation 50s.
（6）Third time is quenched：Finally by steel plate water quenching to room temperature.
Embodiment 2
The material used in actual production comprises the following steps for nickelic C-Si-Mn steel, its production process：
（1）Solution treatment：By material with certain heating rate to 960 DEG C, and it is incubated 18min.
（2）Quench for the first time：Steel plate is transferred in punch die carry out it is hot press-formed, after the completion of water quenching to room temperature.
（3）Converes instruction area is incubated：The steel plate quenched to room temperature is reheated to 700 DEG C, and isothermal 5min.
（4）Second of quenching：By steel plate, rapid quenching is to 320 DEG C in the potassium nitrate and sodium nitrate of melting and is incubated 10s,
Wherein, the volume ratio of potassium nitrate and sodium nitrate before melting is 45%：55%.
（5）Partition：Then by steel plate with 10 DEG C/min heating rate to 390 DEG C of insulation 50s.
（6）Third time is quenched：Finally by steel plate water quenching to room temperature.
Embodiment 3
The material used in actual production comprises the following steps for nickelic C-Si-Mn steel, its production process：
（1）Solution treatment：By material with certain heating rate to 970 DEG C, and it is incubated 20min.
（2）Quench for the first time：Steel plate is transferred in punch die carry out it is hot press-formed, after the completion of water quenching to room temperature.
（3）Converes instruction area is incubated：The steel plate quenched to room temperature is reheated to 700 DEG C, and isothermal 5min.
（4）Second of quenching：By steel plate, rapid quenching is to 330 DEG C in the potassium nitrate and sodium nitrate of melting and is incubated 10s,
Wherein, the volume ratio of potassium nitrate and sodium nitrate before melting is 45%：55%.
（5）Partition：Then by steel plate with 10 DEG C/min heating rate to 390 DEG C of insulation 50s.
（6）Third time is quenched：Finally by steel plate water quenching to room temperature.
Claims (3)
1. a kind of manufacture method of converes instruction drop stamping steel plate, it is characterised in that comprise the following steps：
（1）Solution treatment：By steel plate with certain heating rate to 950 ~ 970 DEG C, 15 ~ 20min is incubated；
（2）Quench for the first time：Steel plate is transferred in punch die and carries out hot press-formed, then water quenching is to room temperature；
（3）Reverse area's insulation：The steel plate of water quenching to room temperature is reheated to 700 DEG C, and is incubated 5 ~ 10min；
（4）Second of quenching：Steel plate is quenched to 310 ~ 330 DEG C in the potassium nitrate and sodium nitrate of melting after the completion of insulation, and
It is incubated 10s；
（5）Partition：Steel plate is heated to 390 DEG C, 50s is incubated；
（6）Third time is quenched：Finally by steel plate water quenching to room temperature.
2. the manufacture method of steel plate according to claim 1, it is characterised in that step（4）In potassium nitrate and sodium nitrate body
Product percentage is 45%：55%.
3. the manufacture method of steel plate according to claim 1, it is characterised in that step（5）In the rate of heat addition for 10 DEG C/
min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710435191.8A CN107245554A (en) | 2017-06-10 | 2017-06-10 | A kind of manufacture method of converes instruction drop stamping steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710435191.8A CN107245554A (en) | 2017-06-10 | 2017-06-10 | A kind of manufacture method of converes instruction drop stamping steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107245554A true CN107245554A (en) | 2017-10-13 |
Family
ID=60018954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710435191.8A Pending CN107245554A (en) | 2017-06-10 | 2017-06-10 | A kind of manufacture method of converes instruction drop stamping steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107245554A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321719A (en) * | 2018-08-14 | 2019-02-12 | 山东建筑大学 | A kind of 800MPa grade Controlled Colling preparation method based on reverted austenite |
| CN109825683A (en) * | 2018-08-14 | 2019-05-31 | 山东建筑大学 | A kind of manganese partition and reverted austenite 800MPa low-carbon Q&P steel Preparation Method |
| CN114540601A (en) * | 2022-01-29 | 2022-05-27 | 河钢股份有限公司 | Heat treatment method for improving impact toughness of steel core for extra-thick ocean platform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943169A (en) * | 2012-12-10 | 2013-02-27 | 北京科技大学 | Quenching and annealing preparation method of ultrahigh-strength thin steel plate for automobiles |
| CN104588473A (en) * | 2014-11-28 | 2015-05-06 | 中国科学院金属研究所 | High-strength plastic product automobile part hot stamping and carbon partition integrated process |
-
2017
- 2017-06-10 CN CN201710435191.8A patent/CN107245554A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943169A (en) * | 2012-12-10 | 2013-02-27 | 北京科技大学 | Quenching and annealing preparation method of ultrahigh-strength thin steel plate for automobiles |
| CN104588473A (en) * | 2014-11-28 | 2015-05-06 | 中国科学院金属研究所 | High-strength plastic product automobile part hot stamping and carbon partition integrated process |
Non-Patent Citations (1)
| Title |
|---|
| 陈辉 等: ""两相区保温及Q&P工艺对改善钢组织性能的分析"", 《山东建筑大学学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321719A (en) * | 2018-08-14 | 2019-02-12 | 山东建筑大学 | A kind of 800MPa grade Controlled Colling preparation method based on reverted austenite |
| CN109825683A (en) * | 2018-08-14 | 2019-05-31 | 山东建筑大学 | A kind of manganese partition and reverted austenite 800MPa low-carbon Q&P steel Preparation Method |
| CN114540601A (en) * | 2022-01-29 | 2022-05-27 | 河钢股份有限公司 | Heat treatment method for improving impact toughness of steel core for extra-thick ocean platform |
| CN114540601B (en) * | 2022-01-29 | 2023-10-27 | 河钢股份有限公司 | Heat treatment method for improving impact toughness of steel core for super-thick ocean platform |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20171013 |