CN110499460A - A kind of heat stamping and shaping cold-rolled strip and its production method - Google Patents
A kind of heat stamping and shaping cold-rolled strip and its production method Download PDFInfo
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- CN110499460A CN110499460A CN201910778674.7A CN201910778674A CN110499460A CN 110499460 A CN110499460 A CN 110499460A CN 201910778674 A CN201910778674 A CN 201910778674A CN 110499460 A CN110499460 A CN 110499460A
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- production method
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- rolled strip
- heat stamping
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- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Abstract
The present invention relates to a kind of heat stamping and shaping cold-rolled strip and its production method, chemical component weight percentage C:0.32~0.36Wt%；Si:0.10~0.30Wt%；Mn:1.30~1.50Wt%；P:≤0.020Wt%；S :≤0.005Wt%；Als:0.020~0.060Wt%；Nb:0.020~0.040Wt%；Ti:0.020~0.040Wt%；B:0.0015~0.0025Wt%；Cr:0.20~0.40Wt%；N :≤0.0060Wt%, balance iron and inevitable impurity.Production method of the invention the following steps are included: steel-making, continuous casting, hot rolling, acid roll, continuous annealing, smooth, finished product.Cold-rolled strip tensile strength >=1900MPa of the present invention, yield strength >=1450MPa, elongation percentage A50 >=5%.
Description
Technical field
The present invention relates to a kind of heat stamping and shaping cold-rolled strip and its production methods, belong to metallurgical plate production technology neck
Domain.
Background technique
Increasingly with the continuous promotion of automotive light weight technology and security requirement, gigapascal and with the demand of higher level's super-high strength steel
Increase, but since high strength steel plate is when carrying out cold forming processing, inevitably there is serious rebound, poor dimensional precision and cracking
The big problem of risk, therefore the application of thermoforming steel is gradually received, but the rank of the steel plate of thermoforming at present mainly exists
1.8GPa is hereinafter, to meet the needs used, it is necessary to design the thermoforming steel plate and its production method of higher intensity rank.
Patent of invention CN 101275200 discloses a kind of super high strength martensitic hot forming steel, the ingredient of steel in the invention
Mass percent is C:0.10-0.33%, Si:0.50-2.30%, Mn:0.50-2.00%, P :≤0.020%, S :≤
0.015%, Al:0.015-0 .060%, B:0.0005-0.0050%, Ti 0.02-0 .10%, Nb 0.02-0.10%, V
0.02-0.15%, RE:0.001-0.050%.After 900-950 DEG C of austenitizing and heat forming technology processing, tensile strength exists
1.3-1.7GPa.It joined a variety of precious alloy Nb, V, Ti in the steel plate, and contain rare metal RE, it is at high cost, and intensity is not
More than 1.7GPa.
Patent of invention CN 106086624 discloses a kind of heat stamping and shaping hot rolled strip and its production method, ingredient
Mass percent are as follows: C:0.20~0.25%, Si:0.15~0.35%, Mn:1.20~1.50%, Cr:0.10~0.50%, P
≤ 0.020%, S≤0.010%, Als:0.030~0.050%, Ti:0.030~0.050%, N≤0.0060%, B:
0.0020~0.0050%.The steel plate ingredient is simple, but the tensile strength after its heat treatment is 1.5-1.8GPa, is also less than
1.8GPa。
Summary of the invention
It is an object of the present invention to provide a kind of heat stamping and shaping cold-rolled strip and its production method, by ingredient design and
It is rolled with corresponding hot rolling, acid, continuous annealing process, obtains a kind of superhigh intensity heat stamping and shaping cold-rolled steel sheet.
The present invention adopts the following technical scheme:
A kind of heat stamping and shaping cold-rolled strip, chemical component weight percentage C:0.32~0.36Wt%；Si:0.10~
0.30Wt%；Mn:1.30~1.50Wt%；P:≤0.020Wt%；S :≤0.005Wt%；Als:0.020~0.060Wt%；Nb:
0.020~0.040Wt %；Ti:0.020~0.040Wt%；B:0.0015~0.0025Wt%；Cr:0.20~0.40Wt%；N :≤
0.0060Wt%, surplus are iron and inevitable impurity.
Further, comprising the following steps: steel-making → continuous casting → hot rolling → acid rolls → continuous annealing → smooth → finished product.
Further, the hot-rolled step: finishing temperature is 860~900 DEG C, and coiling temperature is 600~650 DEG C.
Further, the acid rolls step: acid rolls reduction ratio >=50%.
Further, the continuous annealing step: soaking section temperature is controlled at 800~840 DEG C, 80~200s of soaking time,
5~15 DEG C/s of slow cooling section cooling rate, slow cooling terminate 660~700 DEG C of temperature, and rapid cooling section 20~50 DEG C/s of cooling rate, rapid cooling terminates temperature
380~420 DEG C, 360~400 DEG C of aging section temperature.
Further, the planarization step: smooth elongation control is 0.3~0.5%.
Further, the finished product steel belt is with a thickness of 1.0~2.0mm.
Further, the finished product steel belt through 900-930 DEG C heating and held for some time after be quenched to 250 DEG C hereinafter,
Then it is tempered in 170 DEG C of heat preservation 20min, tensile strength >=1900MPa, yield strength >=1450MPa, elongation percentage A50 >=
5%。
Further, the finished product steel belt is heated and is kept the temperature, soaking time 200-300s through 900-930 DEG C.
The positive effect of the present invention:
The present invention uses high-carbon, Nb, Ti microalloying, while adding appropriate B and Cr to improve the ingredient mentality of designing of harden ability,
Simultaneously match corresponding hot rolling, acid rolls, continuous annealing process, obtain a kind of superhigh intensity heat stamping and shaping cold-rolled strip, finger gauge
Lattice are 1.0~2.0mm, and steel band is quenched to 250 DEG C hereinafter, then at 170 DEG C after 900-930 DEG C of heating and held for some time
Heat preservation 20min is tempered, tensile strength >=1900MPa, yield strength >=1450MPa, elongation percentage A50 >=5%.
Specific embodiment
A kind of production method of heat stamping and shaping cold-rolled strip uses following processing steps:
(1) step: the weight percent for ladle chemistry of tapping are as follows: C:0.32~0.36Wt% is made steel；Si:0.10~
0.30Wt%；Mn:1.30~1.50Wt%；P:≤0.020Wt%；S :≤0.005Wt%；Als:0.020~0.060Wt%；Nb:
0.020~0.040Wt %；Ti:0.020~0.040Wt%；B:0.0015~0.0025Wt%；Cr:0.20~0.40Wt%；N :≤
0.0060Wt%, balance iron and inevitable impurity.
(2) hot-rolled step: finishing temperature is 860~900 DEG C, and coiling temperature is 600~650 DEG C；
(3) acid rolls step: acid rolls reduction ratio >=50%；
(4) continuous annealing step: soaking section temperature control is at 800~840 DEG C, 80~200s of soaking time, slow cooling section cooling rate 5~15
DEG C/s, slow cooling terminates 660~700 DEG C of temperature, and rapid cooling section 20~50 DEG C/s of cooling rate, rapid cooling terminates 380~420 DEG C of temperature, timeliness
360~400 DEG C of Duan Wendu.
(5) planarization step: smooth elongation percentage divides specifications control 0.3~0.5%.
(6) steel band is heat-treated: the finished product steel belt is quenched to 250 DEG C after 900-930 DEG C is heated and keeps the temperature 200-300s
Hereinafter, being then tempered in 170 DEG C of heat preservation 20min, Mechanics Performance Testing is carried out.
The present invention will be further described in detail below with reference to specific embodiments.
6 chemical component value of embodiment 1- example is shown in Table 1；
6 main technologic parameters of embodiment 1- example are shown in Table 2；
Mechanical property is shown in Table 3 after the heat treatment of 6 steel band of embodiment 1- example.
Each embodiment chemical component value (wt%) of table 1
Each embodiment main technologic parameters of table 2
Each embodiment steel band mechanical property of table 3
Claims (9)
1. a kind of heat stamping and shaping cold-rolled strip, which is characterized in that its chemical component weight percentage C:0.32~
0.36Wt%；Si:0.10~0.30Wt%；Mn:1.30~1.50Wt%；P:≤0.020Wt%；S :≤0.005Wt%；Als:0.020
~0.060Wt%；Nb:0.020~0.040Wt %；Ti:0.020~0.040Wt%；B:0.0015~0.0025Wt%；Cr:0.20
~0.40Wt%；N :≤0.0060Wt%, surplus is iron and inevitable impurity.
2. a kind of production method of heat stamping and shaping cold-rolled strip according to claim 1, which is characterized in that including with
Lower step: steel-making → continuous casting → hot rolling → acid rolls → continuous annealing → smooth → finished product.
3. production method according to claim 2, which is characterized in that the hot-rolled step: finishing temperature be 860~
900 DEG C, coiling temperature is 600~650 DEG C.
4. production method according to claim 2, which is characterized in that the acid rolls step: acid rolls reduction ratio >=50%.
5. production method according to claim 2, which is characterized in that the continuous annealing step: soaking section temperature control exists
800~840 DEG C, 80~200s of soaking time, 5~15 DEG C/s of slow cooling section cooling rate, slow cooling terminates 660~700 DEG C of temperature, rapid cooling section
20~50 DEG C/s of cooling rate, rapid cooling terminate 380~420 DEG C of temperature, 360~400 DEG C of aging section temperature.
6. production method according to claim 2, which is characterized in that the planarization step: smooth elongation control exists
0.3~0.5%.
7. production method according to claim 2, which is characterized in that the finished product steel belt is with a thickness of 1.0~2.0mm.
8. production method according to claim 2, which is characterized in that the finished product steel belt is heated and protected through 900-930 DEG C
Temperature is quenched to 250 DEG C hereinafter, be then tempered in 170 DEG C of heat preservation 20min, tensile strength >=1900MPa after a certain period of time, in the wrong
Take intensity >=1450MPa, elongation percentage A50 >=5%.
9. production method according to claim 8, which is characterized in that the finished product steel belt is heated and protected through 900-930 DEG C
Temperature, soaking time 200-300s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910778674.7A CN110499460B (en) | 2019-08-22 | 2019-08-22 | Cold-rolled steel strip for hot stamping forming and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910778674.7A CN110499460B (en) | 2019-08-22 | 2019-08-22 | Cold-rolled steel strip for hot stamping forming and production method thereof |
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| Publication Number | Publication Date |
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| CN110499460A true CN110499460A (en) | 2019-11-26 |
| CN110499460B CN110499460B (en) | 2021-05-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113755746A (en) * | 2021-07-23 | 2021-12-07 | 唐山钢铁集团有限责任公司 | Method for improving band-shaped structure of hot-forming steel plate |
| CN115125439A (en) * | 2022-06-16 | 2022-09-30 | 唐山钢铁集团高强汽车板有限公司 | Hot stamping forming steel with zinc-based coating layer of 1800Mpa grade and preparation method |
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| CN108754319A (en) * | 2018-06-08 | 2018-11-06 | 武汉钢铁有限公司 | Using the tensile strength >=1800MPa grades of hot forming steel and method of the production of ESP producing lines |
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2019
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| JP2007224416A (en) * | 2006-01-24 | 2007-09-06 | Jfe Steel Kk | High-strength cold rolled steel sheet having excellent deep- drawability and ductility and production method, high-strength hot dip galvanized steel sheet using the cold rolled steel sheet and its production method |
| CN105189798A (en) * | 2013-03-14 | 2015-12-23 | 新日铁住金株式会社 | High strength steel plate with excellent delayed destruction resistance characteristics and low temperature toughness, and high strength member manufactured using same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113755746A (en) * | 2021-07-23 | 2021-12-07 | 唐山钢铁集团有限责任公司 | Method for improving band-shaped structure of hot-forming steel plate |
| CN113755746B (en) * | 2021-07-23 | 2022-08-09 | 唐山钢铁集团有限责任公司 | Method for improving band-shaped structure of hot-forming steel plate |
| CN115125439A (en) * | 2022-06-16 | 2022-09-30 | 唐山钢铁集团高强汽车板有限公司 | Hot stamping forming steel with zinc-based coating layer of 1800Mpa grade and preparation method |
| CN115125439B (en) * | 2022-06-16 | 2023-10-31 | 唐山钢铁集团高强汽车板有限公司 | Zinc-based coating 1800 Mpa-level hot stamping formed steel and preparation method thereof |
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| CN110499460B (en) | 2021-05-11 |
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