CN103451535B - A kind of 510MPa level automotive frame hot continuous rolling Strip and production technique thereof - Google Patents
A kind of 510MPa level automotive frame hot continuous rolling Strip and production technique thereof Download PDFInfo
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Abstract
The invention belongs to technical field of steel rolling, particularly a kind of low cost 510MPa level automotive frame hot continuous rolling Strip and production technique thereof.The weight percent of automotive frame hot continuous rolling Strip of the present invention consists of: 0.13 ~ 0.18%C, 0.30 ~ 0.50%Si, 0.75 ~ 1.15%Mn, 0.02 ~ 0.06%Alt, P≤0.025%, S≤0.008%, 0.008 ~ 0.025%Ti, N≤0.006% surplus are Fe and inevitable impurity.This production technique is by fine setting C, Si content, reduce Mn content, only add cheap a small amount of Ti, do not add other expensive alloying elements any, significantly reduce production cost, the minimizing that can realize steel grade is produced, energy-saving and cost-reducing, reducing costs, obtain the beam steel of high comprehensive performance simultaneously, is the product that automobile industry provides cost performance higher.
Description
Technical field
The invention belongs to technical field of steel rolling, relate to a kind of production technique of hot continuous rolling Strip, in particular to a kind of low cost 510MPa level automotive frame hot continuous rolling Strip and production technique thereof, 510MPa level steel plate for automobile frame of the present invention and steel band are applicable to production and the manufacture of the crossbeams such as heavy, medium and light card and agricultural vehicle.
Background technology
In recent years, along with the fast development of modern automobile industry, energy day is becoming tight, environmental stress increasingly sharpens, and adds constantly perfect to legislative work for protecting environment of the whole world, facilitates automotive technology development center of gravity towards energy-saving and environmental protection and the development of security aspect.The auto output of China in 2012 has broken through 1,900 ten thousand, within continuous 4 years, keep the status of the large automobile production state of the first in the world, the industrial scale of commercial car once reached more than 1,000,000/year, the demand of auto truck beam is increasing, therefore design the production technique of the easy-operating beam steel of a kind of low cost, the steel for automobile crossbeam of exploitation higher price-performance ratio is very necessary.
Publication number CN101914729A and CN101914728A individually discloses a kind of niobium-titanium composite beam steel of heavy truck and preparation method thereof and a kind of niobium-titanium composite beam steel of light truck and preparation method thereof, all adopt the Composition Design of low-carbon high-manganese niobium titanium compound, by non-recrystallization controlled rolling, employing conventional chilling technology is produced, its manganese, content of niobium are high, production cost is high, is unfavorable for mass production promotion.
Publication number CN101698926A discloses a kind of steel for automobile crossbeam and temperature control method thereof, its main chemical compositions by mass percent is: 0.08 ~ 0.13%C, Si≤0.30%, 0.90 ~ 1.15%Mn, P≤0.010%, S≤0.010%, 0.02 ~ 0.07%Al, 0.03 ~ 0.05%Nb, surplus is Fe and inevitable impurity, tandem rolling district start rolling temperature is 950 ~ 980 DEG C, finishing temperature 850 ~ 870 DEG C, coiling temperature is 580 ~ 620 DEG C, its phosphorus content of the beam steel of this invention require be no more than 0.010% and higher content of niobium production cost is raised, be unfavorable for mass production promotion.
Publication number CN101147920 discloses containing vanadium automotive frame hot continuous-milling steel plate surface iron scale control method, and in order to control Surfaces of Hot Rolled Strip iron scale, in molten steel, the massfraction of Si is strict controlled in less than 0.2%.The main chemical compositions of the method raw steel by mass percent is: 0.06 ~ 0.12%C, Si≤0.30%, 1.05 ~ 1.25%Mn, P≤0.025%, S≤0.015%, 0.04 ~ 0.10%V, surplus is Fe and inevitable impurity, the method has production cost advantage for the manufacturing enterprise of self-produced vanadium iron ore resources, but make production cost higher to the manufacturing enterprise's the method commercially purchasing vanadium iron raw material, the competitive power of product and cost performance reduce, and are unfavorable for mass production promotion.
Publication number CN101892421A discloses a kind of low-niobium strengthened production process of beam steel, the main chemical compositions mentioned by mass percent is: 0.085 ~ 0.115%C, 0.154 ~ 0.254%Si, 1.40 ~ 1.55%Mn, 0.008 ~ 0.014%Nb, P≤0.015%, S≤0.006%, surplus is Fe and inevitable impurity, the method Fe content is higher, belong to the production technique of low-carbon high-manganese Nb-microalloying beam steel, production cost is higher.
Publication number CN102212747A discloses a kind of low-cost steel for automobile beam and manufacture method thereof, this beam steel and manufacture method thereof still belong to the production technique of low-carbon high-manganese Nb-microalloying beam steel, its manufacture method emphasis passes through process sequence planning, reduce RH treatment cycle, lower slightly compared with LF smelting cost, reduce costs rolling technology and propose high performance effect and further investigate, its production cost is still higher.
Summary of the invention
The object of this invention is to provide a kind of 510MPa level automotive frame hot continuous rolling Strip and production technique thereof.This production technique is by fine setting C, Si content, reduce Mn content, only add cheap a small amount of Ti, do not add other expensive alloying elements any, significantly reduce production cost, the minimizing that can realize steel grade is produced, energy-saving and cost-reducing, reducing costs, obtain the beam steel of high comprehensive performance simultaneously, is the product that automobile industry provides cost performance higher.
The present invention is realized by following technical scheme:
A kind of 510MPa level automotive frame hot continuous rolling Strip, the weight percent of described 510MPa level automotive frame hot continuous rolling Strip consists of: 0.13 ~ 0.18%C, 0.30 ~ 0.50%Si, 0.75 ~ 1.15%Mn, 0.02 ~ 0.06%Alt, P≤0.025%, S≤0.008%, 0.008 ~ 0.025%Ti, N≤0.006% surplus are Fe and inevitable impurity.
Preferably, above-mentioned 510MPa level automotive frame hot continuous rolling Strip, the weight percent of described 510MPa level automotive frame hot continuous rolling Strip consists of: 0.18%C, 0.33%Si, 1.02%Mn, 0.03Alt, 0.015%P, 0.006% S, 0.018%Ti, 0.0036% N, and surplus is Fe and inevitable impurity.
In above-mentioned 510MPa level automotive frame hot continuous rolling Strip, the thickness of described 510MPa level automotive frame hot continuous rolling Strip is 1.6-12mm.
The production technique of above-mentioned 510MPa level automotive frame hot continuous rolling Strip, comprise following steps: molten iron is through KR desulfurization process, through the conventional smelting technology of converter, control molten steel end point carbon, phosphorus, manganese, silicone content well, feed calcium line after LF process to carry out denaturing treatment to inclusion and control the soft blow time being not less than 10 minutes, the continuous casting strand that becomes 135-170mm thick again, strand obtains through rolling.
In the production technique of upper described 510MPa level automotive frame with hot continuous rolling Strip, described rolling technology is: the preparation technology of the 510MPa level automotive frame hot continuous rolling Strip that 1.6 ~ 5mm is thick is: continuously cast bloom be heated to 1150-1250 DEG C and be incubated 1.5 ~ 3.5 hours, roughing total reduction more than 70%, finish rolling total reduction more than 75%, entry temperature at finishing is 1020 ~ 1060 DEG C, finishing temperature 850 ~ 900 DEG C; Rolling rear employing continuous change laminar flow cooling technology is cooled to 450 ~ 600 DEG C to batch.
In the production technique of upper described 510MPa level automotive frame with hot continuous rolling Strip, described continuous change laminar flow cooling technology is: steel band is cooled to 650 ~ 700 DEG C with the cooling rate of 30 ~ 100 DEG C/s in 3S after going out finishing mill, then with the cooling rate continuous coo1ing of 10 ~ 30 DEG C/s to coiling temperature.
In the production technique of upper described 510MPa level automotive frame with hot continuous rolling Strip, described rolling technology is the preparation technology of the 510MPa level automotive frame hot continuous rolling Strip that 5 ~ 12mm is thick: continuously cast bloom be heated to 1150-1250 DEG C and be incubated 1.5 ~ 3.5 hours, roughing total reduction more than 70%, finish rolling total reduction more than 75%, entry temperature at finishing is 950 ~ 1020 DEG C, finishing temperature 790 ~ 850 DEG C; Rolling rear employing continuous change laminar flow cooling technology is cooled to 450 ~ 600 DEG C to batch.
In the production technique of upper described 510MPa level automotive frame with hot continuous rolling Strip, described continuous change laminar flow cooling technology is: steel band is cooled to 650 ~ 700 DEG C with the cooling rate of 30 ~ 100 DEG C/s in 3S after going out finishing mill, then with the cooling rate continuous coo1ing of 10 ~ 30 DEG C/s to coiling temperature.
Roll rear employing continuous change laminar flow cooling technology, steel band is cooled to 650 ~ 700 DEG C with the cooling rate of 30 ~ 100 DEG C/s in 3S after going out finishing mill, then batches to 450 ~ 600 DEG C with the cooling rate continuous coo1ing of 10 ~ 30 DEG C/s.
Utilize the beam steel that this processing method is produced, its Composition Design meets the design concept of minimizing: C is the element of the most cheap raising intensity, too lowly causes low cross-intensity, and the plasticity of too high steel plate reduces, affect steel strip cold-bending forming property, choosing C is 0.13 ~ 0.18%; Si is ferritic solution strengthening element, can improve hardening capacity, and the Si be solidly soluted in ferrite can affect interaction of dislocation, and increase the even extension under preliminary work hardening rate and given strength level, choosing Si is 0.30 ~ 0.50%; The austenitic hardening capacity that Mn is formed when effectively can improve critical zone heating, and play the effect of solution strengthening and fining ferrite grains, also good effect is had to postponement perlitic transformation and bainite transformation, the too low yield strength of steel plate and the tensile strength of making of Mn content is all on the low side, Mn too high levels easily causes serious banded structure, plasticity is reduced, significantly improves production cost simultaneously, choosing Mn is 0.75 ~ 1.15%; P, S are impurity element, low as far as possible, consider production operability, product performance and production cost, control P≤0.025%, S≤0.008%; Al is deoxidant element, and too low deoxidation is insufficient, and the too high inclusion that makes increases, and choosing Al is 0.02 ~ 0.06%; Nitrogen content affects the plasticity of steel plate, and considering cost controls below 0.006%; Carry out Trace Titanium Treatment, the nitrogen in fixing steel, the TiN simultaneously formed when reheating stops Austenite Grain Growth, and is conducive to the welding property of finished steel plate, and choosing Ti is 0.008 ~ 0.025%.
Production technique key of the present invention is rolled technology controlling and process to the strand of determinant, by strictly controlling Heating temperature and heat-up time, control entry temperature at finishing, finishing temperature, open cool time, continuous change cooling parameter and coiling temperature, especially propose first on control finishing temperature basis, control out to begin to cool down the time after finish to gauge, continuous cooling process is adopted to the zonal cooling cooling speed change cooling technique of strict definite, in the production method of automotive frame hot continuous rolling Strip, have no its relevant report.Steel for automobile crossbeam batch stably manufactured more than 20,000 ton adopting this producing and manufacturing technique to produce, mechanical property in kind is Rel >=410MPa, Rm:515-600MPa, A >=24%, cold-bending property is excellent, uses checking to meet the processing requirement of its manufacture crossbeam completely through user.
Utilize the production technique of 510MPa level automotive frame hot continuous rolling Strip of the present invention, by fine setting C, Si content, reduce Mn content, only add cheap a small amount of Ti, do not add other expensive alloying elements any, remarkable reduction production cost, the minimizing that can realize steel grade is produced, energy-saving and cost-reducing, reduces costs, obtain the beam steel of high comprehensive performance, be the product that automobile industry provides cost performance higher simultaneously.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described, so that those skilled in the art more understands the present invention, but does not therefore limit the present invention.
Embodiment 1
Molten iron is through KR desulfurization process, through the conventional smelting technology of converter, control molten steel end point carbon, phosphorus, manganese, silicone content well, feed calcium line after LF process to carry out denaturing treatment to inclusion and control the soft blow time being not less than 10 minutes, continuous casting again, slab smelting component is: 0.13%C, 0.46%Si, 0.89%Mn, 0.03Alt, 0.017%P, 0.005% S, 0.013%Ti, 0.0042% N, surplus is Fe and inevitable impurity, slab thickness is 135mm, and strand obtains 510MPa level automotive frame hot continuous rolling Strip through rolling;
Rolling technology is: by heating of plate blank 1220 DEG C, heat-up time is 2 hours, entry temperature at finishing is 1040 DEG C, and finishing temperature is 860 DEG C, and finish to gauge starts water-cooled after terminating rear 1.5S, about 660 DEG C are cooled to the speed of 80 ~ 90 DEG C/S, then be cooled to 480 DEG C to batch with the speed of 25 ~ 30 DEG C/S, belt steel thickness is 4.0mm, and yield strength is 435MPa, tensile strength is 550MPa, and unit elongation is 26%.
Embodiment 2
Molten iron is through KR desulfurization process, through the conventional smelting technology of converter, control molten steel end point carbon, phosphorus, manganese, silicone content well, feed calcium line after LF process to carry out denaturing treatment to inclusion and control the soft blow time being not less than 10 minutes, continuous casting again, slab smelting component is: 0.15%C, 0.36%Si, 0.87%Mn, 0.04Alt, 0.014%P, 0.006% S, 0.017%Ti, 0.0028% N, surplus is Fe and inevitable impurity, slab thickness is 135mm, and strand obtains 510MPa level automotive frame hot continuous rolling Strip through rolling;
Rolling technology is: by heating of plate blank 1180 DEG C, heat-up time is 2.5 hours, entry temperature at finishing is 1020 DEG C, and finishing temperature is 850 DEG C, and finish to gauge starts water-cooled after terminating rear 2S, about 670 DEG C are cooled to the speed of 70 ~ 80 DEG C/S, then be cooled to 530 DEG C to batch with the speed of 20 ~ 25 DEG C/S, belt steel thickness is 4.9mm, and yield strength is 430MPa, tensile strength is 540MPa, and unit elongation is 27.5%.
Embodiment 3
Molten iron KR desulfurization, converter smelting, LF process, continuous casting, slab smelting component is: 0.17%C, 0.38%Si, 0.96%Mn, 0.03Alt, 0.013%P, 0.003% S, 0.014%Ti, 0.0032% N, surplus is Fe and inevitable impurity, slab thickness is 135mm, and strand obtains 510MPa level automotive frame hot continuous rolling Strip through rolling;
Rolling technology is: by heating of plate blank 1200 DEG C, heat-up time is 2.5 hours, entry temperature at finishing is 1000 DEG C, and finishing temperature is 840 DEG C, and finish to gauge starts water-cooled after terminating rear 2S, about 650 DEG C are cooled to the speed of 60 ~ 70 DEG C/S, then be cooled to 570 DEG C to batch with the speed of 15 ~ 20 DEG C/S, belt steel thickness is 6.0mm, and yield strength is 425MPa, tensile strength is 560MPa, and unit elongation is 28.5%.
Embodiment 4
Molten iron is through KR desulfurization process, through the conventional smelting technology of converter, control molten steel end point carbon, phosphorus, manganese, silicone content well, feed calcium line after LF process to carry out denaturing treatment to inclusion and control the soft blow time being not less than 10 minutes, continuous casting again, slab smelting component is: 0.18%C, 0.33%Si, 1.02%Mn, 0.03Alt, 0.015%P, 0.006% S, 0.018%Ti, 0.0036% N, surplus is Fe and inevitable impurity, slab thickness is 135mm, and strand obtains 510MPa level automotive frame hot continuous rolling Strip through rolling;
Rolling technology is: by heating of plate blank 1230 DEG C, heat-up time is 2.5 hours, entry temperature at finishing is 970 DEG C, and finishing temperature is 820 DEG C, and finish to gauge starts water-cooled after terminating rear 2.5S, about 680 DEG C are cooled to the speed of 40 ~ 50 DEG C/S, then be cooled to 590 DEG C to batch with the speed of 15 ~ 20 DEG C/S, belt steel thickness is 7.0mm, and yield strength is 445MPa, tensile strength is 570MPa, and unit elongation is 25%.
Embodiment 5
Molten iron is through KR desulfurization process, through the conventional smelting technology of converter, control molten steel end point carbon, phosphorus, manganese, silicone content well, feed calcium line after LF process to carry out denaturing treatment to inclusion and control the soft blow time being not less than 10 minutes, continuous casting again, slab smelting component is: 0.18%C, 0.33%Si, 1.00%Mn, 0.03Alt, 0.014%P, 0.003% S, 0.014%Ti, 0.0037% N, surplus is Fe and inevitable impurity, slab thickness is 135mm, and strand obtains 510MPa level automotive frame hot continuous rolling Strip through rolling;
Rolling technology is: by heating of plate blank 1170 DEG C, heat-up time is 2.5 hours, entry temperature at finishing is 960 DEG C, and finishing temperature is 800 DEG C, and finish to gauge starts water-cooled after terminating rear 2.5S, about 690 DEG C are cooled to the speed of 30 ~ 40 DEG C/S, then be cooled to 580 DEG C to batch with the speed of 10 ~ 15 DEG C/S, belt steel thickness is 8.0mm, and yield strength is 440MPa, tensile strength is 550MPa, and unit elongation is 26%.
Embodiment 6
Molten iron is through KR desulfurization process, through the conventional smelting technology of converter, control molten steel end point carbon, phosphorus, manganese, silicone content well, feed calcium line after LF process to carry out denaturing treatment to inclusion and control the soft blow time being not less than 10 minutes, continuous casting again, slab smelting component is: 0.17%C, 0.43%Si, 1.06%Mn, 0.04Alt, 0.018%P, 0.004% S, 0.016%Ti, 0.0042% N, surplus is Fe and inevitable impurity, slab thickness is 170mm, and strand obtains 510MPa level automotive frame hot continuous rolling Strip through rolling;
Rolling technology is: by heating of plate blank 1160 DEG C, heat-up time is 2.5 hours, entry temperature at finishing is 950 DEG C, and finishing temperature is 800 DEG C, and finish to gauge starts water-cooled after terminating rear 3S, about 670 DEG C are cooled to the speed of 30 ~ 40 DEG C/S, then be cooled to 590 DEG C to batch with the speed of 10 ~ 15 DEG C/S, belt steel thickness is 10.0mm, and yield strength is 420MPa, tensile strength is 540MPa, and unit elongation is 25%.
The standard-required of 510MPa level beam steel and the performance of above-described embodiment as shown in the table.
| Lower yield strength ReL/MPa | Tensile strength Rm/MPa | Elongation after fracture A | |
| GB/T3273 | ≥355 | 510～630 | ≥24 |
| Embodiment 1 | 435 | 550 | 26 |
| Embodiment 2 | 430 | 540 | 27.5 |
| Embodiment 3 | 425 | 560 | 28.5 |
| Embodiment 4 | 445 | 570 | 25 |
| Embodiment 5 | 440 | 550 | 26 |
| Embodiment 6 | 420 | 540 | 25 |
As seen from the above embodiment, the production technique of a kind of 510MPa level automotive frame hot continuous rolling Strip of the present invention, key point for process is clearly clear, easy handling, especially production cost is low, ensure that mechanical property and the processing performance of product fine, product cost is high, is beneficial to mass production promotion simultaneously.
Claims (4)
1. a 510MPa level automotive frame hot continuous rolling Strip, it is characterized in that, the weight percent of described 510MPa level automotive frame hot continuous rolling Strip consists of: 0.13 ~ 0.18%C, 0.30 ~ 0.50%Si, 0.75 ~ 1.15%Mn, 0.02 ~ 0.06%Alt, P≤0.025%, S≤0.008%, 0.008 ~ 0.025%Ti, N≤0.006% surplus are Fe and inevitable impurity;
The production technique of described 510MPa level automotive frame hot continuous rolling Strip, comprise following steps: molten iron is through KR desulfurization process, through the conventional smelting technology of converter, control molten steel end point carbon, phosphorus, manganese, silicone content well, feed calcium line after LF process to carry out denaturing treatment to inclusion and control the soft blow time being not less than 10 minutes, the continuous casting strand that becomes 135-170mm thick again, strand obtains through rolling;
Described rolling technology is: the preparation technology of the 510MPa level automotive frame hot continuous rolling Strip that 1.6 ~ 5mm is thick is: continuously cast bloom be heated to 1150-1250 DEG C and be incubated 1.5 ~ 3.5 hours, roughing total reduction more than 70%, finish rolling total reduction more than 75%, entry temperature at finishing is 1020 ~ 1060 DEG C, finishing temperature 850 ~ 900 DEG C; Rolling rear employing continuous change laminar flow cooling technology is cooled to 450 ~ 600 DEG C to batch;
Or described rolling technology is the preparation technology of the 510MPa level automotive frame hot continuous rolling Strip that 5 ~ 12mm is thick: continuously cast bloom be heated to 1150-1250 DEG C and be incubated 1.5 ~ 3.5 hours, roughing total reduction more than 70%, finish rolling total reduction more than 75%, entry temperature at finishing is 950 ~ 1020 DEG C, finishing temperature 790 ~ 850 DEG C; Rolling rear employing continuous change laminar flow cooling technology is cooled to 450 ~ 600 DEG C to batch.
2. 510MPa level automotive frame hot continuous rolling Strip according to claim 1, it is characterized in that, the weight percent of described 510MPa level automotive frame hot continuous rolling Strip consists of: 0.18%C, 0.33%Si, 1.02%Mn, 0.03Alt, 0.015%P, 0.006% S, 0.018%Ti, 0.0036% N, and surplus is Fe and inevitable impurity.
3. 510MPa level automotive frame hot continuous rolling Strip according to claim 1 and 2, is characterized in that, the thickness of described 510MPa level automotive frame hot continuous rolling Strip is 1.6-12mm.
4. the production technique of 510MPa level automotive frame hot continuous rolling Strip according to claim 1, it is characterized in that, described continuous change laminar flow cooling technology is: steel band is cooled to 650 ~ 700 DEG C with the cooling rate of 30 ~ 100 DEG C/s in 3s after going out finishing mill, then with the cooling rate continuous coo1ing of 10 ~ 30 DEG C/s to coiling temperature.
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| CN105088066B (en) * | 2015-08-31 | 2017-10-24 | 武汉钢铁有限公司 | A kind of 420MPa grades of automotive frame coated steel and production method |
| CN105088068B (en) * | 2015-08-31 | 2017-11-03 | 武汉钢铁(集团)公司 | A kind of 500MPa grades of automotive frame coated steel and its ultrafast cold production method |
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| CN106756551A (en) * | 2016-12-14 | 2017-05-31 | 武汉科技大学 | A kind of ATM high-strength steel sheet and its manufacture method |
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| CN114990453A (en) * | 2022-05-26 | 2022-09-02 | 天津荣程联合钢铁集团有限公司 | Titanium microalloyed low-alloy high-strength steel and production process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348843A (en) * | 2008-08-08 | 2009-01-21 | 湖南华菱涟源钢铁有限公司 | Method for producing hot-rolled steel strip for automobile beam |
| CN101892421A (en) * | 2009-12-31 | 2010-11-24 | 宝钢集团新疆八一钢铁有限公司 | Automobile beam steel low-niobium strengthened production process |
| CN102776442A (en) * | 2012-07-27 | 2012-11-14 | 武汉钢铁(集团)公司 | Hot rolled steel used for stirrer in automotive stirring tank and production method thereof |
| CN102864384A (en) * | 2012-08-31 | 2013-01-09 | 中国重汽集团济南动力有限公司 | High-strength automobile axle housing material and method for manufacturing axle housing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11293398A (en) * | 1998-04-06 | 1999-10-26 | Kawasaki Steel Corp | Hot rolled steel plate suited to high density energy beam welding, and its production |
| JP3852279B2 (en) * | 1999-11-24 | 2006-11-29 | Ｊｆｅスチール株式会社 | Manufacturing method of rolled H-section steel with excellent earthquake resistance |
-
2013
- 2013-09-18 CN CN201310427205.3A patent/CN103451535B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348843A (en) * | 2008-08-08 | 2009-01-21 | 湖南华菱涟源钢铁有限公司 | Method for producing hot-rolled steel strip for automobile beam |
| CN101892421A (en) * | 2009-12-31 | 2010-11-24 | 宝钢集团新疆八一钢铁有限公司 | Automobile beam steel low-niobium strengthened production process |
| CN102776442A (en) * | 2012-07-27 | 2012-11-14 | 武汉钢铁(集团)公司 | Hot rolled steel used for stirrer in automotive stirring tank and production method thereof |
| CN102864384A (en) * | 2012-08-31 | 2013-01-09 | 中国重汽集团济南动力有限公司 | High-strength automobile axle housing material and method for manufacturing axle housing |
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