CN108486463A - A kind of high strength and ductility cold-rolled steel sheet and its production method with TRIP effects - Google Patents
A kind of high strength and ductility cold-rolled steel sheet and its production method with TRIP effects Download PDFInfo
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- CN108486463A CN108486463A CN201810287557.6A CN201810287557A CN108486463A CN 108486463 A CN108486463 A CN 108486463A CN 201810287557 A CN201810287557 A CN 201810287557A CN 108486463 A CN108486463 A CN 108486463A
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- 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
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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
- 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
- C21D8/02—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
- C22C38/04—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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Abstract
The invention discloses a kind of high strength and ductility cold-rolled steel sheet and its production method with TRIP effects, the cold-rolled steel sheet chemical composition composition and its mass percentage are：C：0.20~0.23%, Si：1.50~1.70%, Mn：2.10~2.30%, P≤0.020%, S≤0.008%, Als：0.020~0.060%, Nb：0.040~0.060%, Ti：0.040~0.060%, N≤0.0040%, remaining is iron and inevitable impurity element；The production method include steel-making, continuous casting, hot rolling, acid roll, continuous annealing, smooth process.Carbon, high silicon, Gao Meng during the present invention uses, Nb, Ti microalloying, by rational composition design and match corresponding hot rolling, acid rolls, continuous annealing process, the high strength and ductility cold-rolled steel sheet with TRIP effects of production is suitable for making automobile collision preventing component.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of high strength and ductility cold-rolled steel sheet with TRIP effects and its
Production method.
Background technology
To adapt to the development trend of auto industry low energy consumption and high security, car manufacturer and iron and steel enterprise actively cause
Power is in the exploitation of body lightening design and automobile high-strength steel, currently, high-strength steel of the tensile strength in 1180MPa or more ranks
The tissue modulation mode of generally use two-phase or complex phase, composition design mainly add microalloy element, such steel plate using higher carbon
Elongation percentage it is usual less than 10%, but for adapt to cold forming processing request, need keep tensile strength 1180MPa or more base
On plinth, elongation percentage is improved to 15% or so.This implements tired for traditional organization design thinking and continuous annealing process
It is difficult.
The present invention provides one by suitably smelting composition design and hot rolling, cold rolling and continuous annealing process parameter
High strength and ductility cold-rolled steel sheet of the kind with TRIP effects, makes steel plate have both high intensity and excellent plasticity, is suitable for making automobile anti-
Hit component.
Invention content
The technical problem to be solved in the present invention is to provide a kind of high strength and ductility cold-rolled steel sheet with TRIP effects and its lifes
Production side.The present invention by suitable composition design and match corresponding hot rolling, acid rolls, continuous annealing process, product have it is good comprehensive
Close performance.
In order to solve the above technical problems, the technical solution adopted by the present invention is that：A kind of high strength and ductility with TRIP effects
Cold-rolled steel sheet, the cold-rolled steel sheet chemical composition composition and its mass percentage are：C：0.20~0.23%, Si：1.50~
1.70%、Mn：2.10~2.30%, P≤0.020%, S≤0.008%, Als：0.020~0.060%, Nb：0.040~0.060%,
Ti：0.040~0.060%, N≤0.0040%, remaining is iron and inevitable impurity element.
Cold-rolled steel sheet thickness of the present invention is 1.0-2.0mm.
Cold-rolled steel sheet yield strength >=820MPa of the present invention, tensile strength >=1180MPa, elongation percentage A50 >=14%,
Paralympic content >=10%.
The present invention also provides a kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects, the producers
Method include steel-making, continuous casting, hot rolling, acid roll, continuous annealing, smooth process.
Continuous casting steel billet is heated to 1250-1300 DEG C, slab time inside furnace 190- by hot-rolled process of the present invention
230min。
Hot-rolled process of the present invention, finish rolling start rolling temperature are 1070-1100 DEG C, and finishing temperature is 870-900 DEG C.
Hot-rolled process of the present invention, coiling temperature are 670-700 DEG C.
Acid of the present invention rolls process, and acid rolls reduction ratio >=55%, 80-90 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.0-
2.0mm。
Continuous annealing process of the present invention, the control of soaking zone temperature is at 790~810 DEG C, soaking time 90-140s, slow cooling section
4-10 DEG C of cooling rate/s, 680~720 DEG C of slow cooling end temp, rapid cooling section 40-75 DEG C/s of cooling rate, rapid cooling end temp 310~330
DEG C, 300~320 DEG C of aging section temperature.
Smooth process of the present invention, smooth elongation control is 0.5~0.8%.
A kind of high strength and ductility cold-rolled steel sheet product standard with TRIP effects of the present invention refers to Q/BQB 418-2014；Production
Product mechanical property test method canonical reference GB/T 228.1-2010.
It is using advantageous effect caused by above-mentioned technical proposal：Carbon, high silicon, Gao Meng during the present invention uses, Nb, Ti are micro-
Alloying, by rational composition design and match corresponding hot rolling, acid rolls, continuous annealing process, production with TRIP effects
High strength and ductility cold-rolled steel sheet yield strength >=820MPa, tensile strength >=1180MPa, elongation percentage A50 >=14%, paralympic content >=
10%, high intensity and excellent plasticity are had both, is suitable for making automobile collision preventing component.
Specific implementation mode
With reference to specific embodiment, the present invention will be further described in detail.
Embodiment 1
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 1.0mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1260 DEG C, slab time inside furnace 215min；Finish rolling start rolling temperature is 1100 DEG C, eventually
It is 900 DEG C to roll temperature, and coiling temperature is 690 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 60%, 80 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.0mm；
（3）Continuous annealing：The control of soaking zone temperature is at 810 DEG C, soaking time 99s, 9 DEG C/s of slow cooling section cooling rate, slow cooling end temp 695
DEG C, rapid cooling section 75 DEG C/s of cooling rate, 325 DEG C of rapid cooling end temp, 315 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.5%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Embodiment 2
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 1.2mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1290 DEG C, slab time inside furnace 230min；Finish rolling start rolling temperature is 1095 DEG C, eventually
It is 875 DEG C to roll temperature, and coiling temperature is 680 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 60%, 90 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.2mm；
（3）Continuous annealing：The control of soaking zone temperature is at 795 DEG C, soaking time 99s, 9 DEG C/s of slow cooling section cooling rate, slow cooling end temp 680
DEG C, rapid cooling section 61 DEG C/s of cooling rate, 330 DEG C of rapid cooling end temp, 320 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.6%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Embodiment 3
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 1.4mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1250 DEG C, slab time inside furnace 190min；Finish rolling start rolling temperature is 1080 DEG C, eventually
It is 880 DEG C to roll temperature, and coiling temperature is 695 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 60%, 82 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.4mm；
（3）Continuous annealing：The control of soaking zone temperature is at 805 DEG C, soaking time 119s, 7 DEG C/s of slow cooling section cooling rate, slow cooling end temp
705 DEG C, rapid cooling section 55 DEG C/s of cooling rate, 318 DEG C of rapid cooling end temp, 308 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.6%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Embodiment 4
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 1.6mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1300 DEG C, slab time inside furnace 205min；Finish rolling start rolling temperature is 1083 DEG C, eventually
It is 870 DEG C to roll temperature, and coiling temperature is 670 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 55%, 84 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.6mm；
（3）Continuous annealing：The control of soaking zone temperature is at 798 DEG C, soaking time 119s, 6 DEG C/s of slow cooling section cooling rate, slow cooling end temp
710 DEG C, rapid cooling section 48 DEG C/s of cooling rate, 310 DEG C of rapid cooling end temp, 300 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.7%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Embodiment 5
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 1.8mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1275 DEG C, slab time inside furnace 220min；Finish rolling start rolling temperature is 1075 DEG C, eventually
It is 878 DEG C to roll temperature, and coiling temperature is 700 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 55%, 88 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.8mm；
（3）Continuous annealing：The control of soaking zone temperature is at 800 DEG C, soaking time 132s, 5 DEG C/s of slow cooling section cooling rate, slow cooling end temp
720 DEG C, rapid cooling section 46 DEG C/s of cooling rate, 320 DEG C of rapid cooling end temp, 310 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.7%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Embodiment 6
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 2.0mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1280 DEG C, slab time inside furnace 195min；Finish rolling start rolling temperature is 1070 DEG C, eventually
It is 892 DEG C to roll temperature, and coiling temperature is 675 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 55%, 85 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 2.0mm；
（3）Continuous annealing：The control of soaking zone temperature is at 790 DEG C, soaking time 132s, 6 DEG C/s of slow cooling section cooling rate, slow cooling end temp
685 DEG C, rapid cooling section 40 DEG C/s of cooling rate, 324 DEG C of rapid cooling end temp, 314 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.8%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Embodiment 7
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 1.0mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1265 DEG C, slab time inside furnace 220min；Finish rolling start rolling temperature is 1085 DEG C, eventually
It is 885 DEG C to roll temperature, and coiling temperature is 690 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 60%, 80 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.0mm；
（3）Continuous annealing：The control of soaking zone temperature is at 800 DEG C, soaking time 90s, 4 DEG C/s of slow cooling section cooling rate, slow cooling end temp 720
DEG C, rapid cooling section 75 DEG C/s of cooling rate, 320 DEG C of rapid cooling end temp, 310 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.8%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Embodiment 8
A kind of high strength and ductility cold-rolled steel sheet thickness with TRIP effects of the present embodiment is 2.0mm, chemical composition composition and matter
Amount percentage composition is shown in Table 1.
A kind of production method of the high strength and ductility cold-rolled steel sheet with TRIP effects of the present embodiment includes steel-making, continuous casting, heat
Roll, acid rolls, continuous annealing, smooth process, specific process step is as described below：
（1）Hot rolling：Continuous casting steel billet is heated to 1285 DEG C, slab time inside furnace 195min；Finish rolling start rolling temperature is 1090 DEG C, eventually
It is 895 DEG C to roll temperature, and coiling temperature is 685 DEG C；
（2）Acid rolls：Acid rolls reduction ratio 55%, 90 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 2.0mm；
（3）Continuous annealing：The control of soaking zone temperature is at 790 DEG C, soaking time 140s, 10 DEG C/s of slow cooling section cooling rate, slow cooling end temp
685 DEG C, rapid cooling section 40 DEG C/s of cooling rate, 324 DEG C of rapid cooling end temp, 314 DEG C of aging section temperature；
（4）It is smooth：Smooth elongation control is 0.5%.
A kind of high strength and ductility cold-rolled steel sheet mechanical property with TRIP effects of the present embodiment is shown in Table 2.
Cold-rolled steel sheet chemical composition composition and mass percentage in 1 embodiment 1-8 of table（%）
Ingredient surplus is iron and inevitable impurity element in table 1.
Cold-rolled steel sheet mechanical property in 2 embodiment 1-8 of table
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although with reference to above-described embodiment to the present invention into
Go detailed description, it will be understood by those of ordinary skill in the art that：It can still modify to the present invention or equally replace
It changes, without departing from the spirit or scope of the invention, or any substitutions, the right that should all cover in the present invention is wanted
It asks in range.
Claims (10)
1. a kind of high strength and ductility cold-rolled steel sheet with TRIP effects, which is characterized in that the cold-rolled steel sheet chemical composition composition
And its mass percentage is：C：0.20~0.23%, Si：1.50~1.70%, Mn：2.10~2.30%, P≤0.020%, S≤
0.008%、Als：0.020~0.060%, Nb：0.040~0.060%, Ti：0.040~0.060%, N≤0.0040%, remaining is
Iron and inevitable impurity element.
2. a kind of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 1, which is characterized in that described cold
Steel rolling plate thickness is 1.0-2.0mm.
3. a kind of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 1, which is characterized in that described cold
Rolled steel plate yield strength >=820MPa, tensile strength >=1180MPa, elongation percentage A50 >=14%, paralympic content >=10%.
4. the producer based on a kind of high strength and ductility cold-rolled steel sheet with TRIP effects described in claim 1-3 any one
Method, which is characterized in that the production method include steel-making, continuous casting, hot rolling, acid roll, continuous annealing, smooth process.
5. a kind of production method of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 4, feature
It is, the hot-rolled process, continuous casting steel billet is heated to 1250-1300 DEG C, slab time inside furnace 190-230min.
6. a kind of production method of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 4, feature
It is, the hot-rolled process, finish rolling start rolling temperature is 1070-1100 DEG C, and finishing temperature is 870-900 DEG C.
7. a kind of producer of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 4-6 any one
Method, which is characterized in that the hot-rolled process, coiling temperature are 670-700 DEG C.
8. a kind of producer of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 4-6 any one
Method, which is characterized in that the acid rolls process, and acid rolls reduction ratio >=55%, 80-90 DEG C of acid liquor temperature, Cold Rolled Plate Thickness 1.0-
2.0mm。
9. a kind of producer of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 4-6 any one
Method, which is characterized in that the continuous annealing process, the control of soaking zone temperature is at 790~810 DEG C, soaking time 90-140s, slow cooling section
4-10 DEG C of cooling rate/s, 680~720 DEG C of slow cooling end temp, rapid cooling section 40-75 DEG C/s of cooling rate, rapid cooling end temp 310~330
DEG C, 300~320 DEG C of aging section temperature.
10. a kind of production of high strength and ductility cold-rolled steel sheet with TRIP effects according to claim 4-6 any one
Method, which is characterized in that the smooth process, smooth elongation control is 0.5~0.8%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852887A (en) * | 2019-03-28 | 2019-06-07 | 唐山钢铁集团有限责任公司 | A kind of superelevation strength and ductility product cold-rolled steel sheet and its production method |
| CN110387551A (en) * | 2019-08-06 | 2019-10-29 | 北京首钢冷轧薄板有限公司 | A kind of technique that acid rolls 600MPa grades of TRIP steel of production |
| CN110499461A (en) * | 2019-08-22 | 2019-11-26 | 唐山钢铁集团有限责任公司 | A kind of automotive seat welded tube ultra-high strength steel plate and its production method |
| CN112795837A (en) * | 2020-11-20 | 2021-05-14 | 唐山钢铁集团有限责任公司 | 1300Mpa high-toughness cold-formed steel plate and production method thereof |
| CN115181896A (en) * | 2021-04-02 | 2022-10-14 | 宝山钢铁股份有限公司 | 980 MPa-grade low-carbon low-alloy hot-dip galvanized TRIP steel and rapid heat treatment hot-dip galvanizing manufacturing method |
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