CN103014494B - Hot rolling steel plate for automobile girder, and manufacturing method thereof - Google Patents
Hot rolling steel plate for automobile girder, and manufacturing method thereof Download PDFInfo
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Abstract
The present invention provides a manufacturing method of a hot rolling steel plate for an automobile girder. The production method comprises a steelmaking step, a continuous casting step, a heating step, a hot continuous rolling step and a coiling step, and is characterized in that components of the molten steel after steelmaking comprise 0.05-0.1 wt% of C, 0.15-0.35 wt% of Si, 1-2 wt% of Mn, 0.01-0.1 wt% of Nb, 0.03-0.12 wt% of Ti, less than or equal to 0.025 wt% of P, less than or equal to 0.01 wt% of S, and the balance of Fe and unavoidable impurities, a finish rolling temperature in the hot continuous rolling step is 830-900 DEG C, and a coiling temperature is 600-700 DEG C. The present invention further provides the hot rolling steel plate prepared by using the method and provided for the automobile girder. With the manufacturing method, production cost is reduced, and rolling process control is simple. With the hot rolling steel plate for the automobile girder, hot rolling product structures are substantially enriched and improved.
Description
Technical field
The present invention relates to a kind of hot continuous rolling strip production technical field, the large hot-rolled steel sheet of Yield strength 700 MPa grade high-strength vehicle that particularly relates to the manufacture method of the large hot-rolled steel sheet of a kind of Yield strength 700 MPa grade high-strength vehicle and manufactured by the method.
Background technology
In recent years, along with rising steadily of vehicle fuel expense is day by day serious to the negative impact of living environment with exhaust emissions, add people to the improving constantly of Crash Safety Design of Vehicles requirement, how guaranteeing that under safety, comfortable prerequisite, making vehicle body loss of weight is the key that solves this series of problems.Thereby promoted automotive body structure and material therefor just changes a lot, required the steel strength that uses more and more higher.At present, heavy and medium truck longeron adopts " main longitudinal grider+strong beam " formula vehicle frame of lengthening beam and " two crossbeam " structure-more, each automaker constantly increases by the demand of steel plate high-strength vehicle beam, each iron and steel enterprise also goes with the tide of historical development, the automotive frame hot-rolled steel sheet that constantly exploitation makes new advances.As People, Dongfeng Automobile, on Chongqing, comply with red the on probation of yield strength 700Mpa level automotive frame steel plate that all start to carry out.
Foreign iron and steel enterprise to the Application and Development of 700MPa level low alloy high-strength hot-rolled steel sheet early, the Domex 700MC hot-rolled steel sheet that Dong Feng Auto Corporation one full year of life Hua Dengdui Sweden SSAB company produces is analyzed, its chemical composition requires as the C of≤0.12 % by weight, the Mn of≤2.1 % by weight, the Nb of≤0.07 % by weight, the Ti of≤0.1 % by weight, the Mo of≤0.5 % by weight, the mechanical property of typical case's finished steel plate is Rel=735MPa, Rm=820MPa, A=16%, Domex 700MC contains Mo precious metal element, production cost is higher, and the unit elongation of Domex 700MC hot-rolled steel sheet is lower, the Zhang Fengquan of University of Science & Technology, Beijing etc. has discussed the TS780 hot-rolled steel sheet of Kawasaki, Japan company exploitation in the current situation and development article of Low Alloy Steel for Automobile, its chemical composition be the C of 0.08 % by weight, the Mn of the Si of 1.5 % by weight, 1.8 % by weight, the Ti of 0.1 % by weight, finished steel plate mechanical property is Rm >=800MPa, A >=20%, utilize titanium precipitation strength and ferrite+martensite polyphase structure of ferritic phase, reached good over-all properties, but finishing temperature and the coiling temperature of producing this kind of steel plate are low, and producting process difficulty is larger, Anshan iron and steel plant share technique center Chen Yan etc. are studied the NANO-HITEN steel of NKK exploitation at the research and development of products strategy article of Japanese JFE Iron And Steel Company, chemical composition is that the C of 0.2 % by weight is, the Mn of the Si of 1.46 % by weight, 1.45 % by weight, mechanical property is Rel=670MPa, Rm=830MPa, A=39%, the finishing temperature of NANO-HITEN steel plate is 800 ℃, coiling temperature is 380 ℃, low carbon levels and interpolation molybdenum have been avoided pearlitic generation, but it is higher to add molybdenum production cost, and finishing temperature and coiling temperature are low, and producting process difficulty is larger, Northeastern University's land ingenuity has been studied physical metallurgy mechanism and the industrial production technology of domestic Baosteel BS700MC high strength microalloy steel, BS700MC adopts the micro-alloyed steel composition system of Nb, Ti, the compound interpolation of Mo, take precipitation strength as main, be aided with phase transformation strengthening and refined crystalline strengthening, low resistance to deformation while having realized rolling and the high strength of product, but adding of Mo increased production cost.A kind of method of producing high-strength steel with yield strength of 700 MPa of the inventions such as the burnt state of Hunan Hualing Lianyuan Iron And Steel Co., Ltd China, its chemical composition content is the C of 0.03-0.08 % by weight, the Si of 0.2-0.5 % by weight, 1.4-2 the Mn of % by weight, the Ti of 0.1-0.15 % by weight, the Nb of 0.02-0.08 % by weight, the V of 0-0.03 % by weight, adopt continuous casting and rolling technique of sheet bar, finishing temperature is 820-880 ℃, after laminar flow is cooling, coiling temperature is 550-620 ℃, the yield strength scope of product is 690-760MPa, curling temperature is lower, producting process difficulty is larger, a kind of 700MPa grade composite strengthening bainite steel of the new equality invention of Zhujiang Iron and Steel Co Ltd, Guangzhou's hair and preparation method thereof adopts continuous casting and rolling technique of sheet bar, its chemical composition content is the C of 0.03-0.07 % by weight, the Mn of 1.51-2.1 % by weight, the Cr of 0.5-0.8 % by weight, the Ti of 0.1-0.15 % by weight, the tissue of steel be take tiny bainite as main, more than product yield strength can reach 700MPa, in this steel plate, contain Cr, and Ti content is higher, production cost is higher, and coiling temperature is low, and producting process difficulty is larger.
Visible, the production technology route of the grade high-strength hot-rolled steel plate of 700MPa generally adopts the microalloying route that adds niobium, titanium, molybdenum and manganese, and the molybdenum content of part steel grade even reaches 0.2-0.5 % by weight, and chromium content reaches 0.5-0.8 % by weight, and production cost is higher; Portioned product adopts continuous casting and rolling technique of sheet bar, and low finishing temperature, low coiling temperature and conventional process for cooling, make to introduce bainite or martensite strengthening in finished product tissue, and producting process difficulty is larger.
Summary of the invention
The object of the invention is, in order to overcome in prior art the higher and larger defect of producting process difficulty of the grade high-strength hot-rolled Plate Production cost of 700MPa, provides hot-rolled steel sheet and manufacture method thereof for a kind of new automotive frame.
The present inventor surprisingly finds under study for action, adopt niobium, titanium, manganese microalloying mode, and each component is controlled in suitable content range, and adopt the high finish rolling finishing temperature of 830-900 ℃ and the high coiling temperature of 600-700 ℃, can make the automotive frame of producing there is high-intensity high-tenacity with hot-rolled steel sheet, and saved cost with respect to the steel for automobile crossbeam that the Ti that adopts Mo, Cr and high level makes component, and high finish rolling finishing temperature and high coiling temperature make controlling of production process simple.
Therefore, to achieve these goals, on the one hand, the invention provides the manufacture method of hot-rolled steel sheet for a kind of automotive frame, the method comprises steel-making step, continuous casting step, heating steps, hot continuous rolling step and batches step, it is characterized in that, molten steel composition after described steel-making is: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, the Mn of 1-2 % by weight, the Nb of 0.01-0.1 % by weight, the Ti of 0.03-0.12 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity; Finish rolling finishing temperature in described hot continuous rolling step is 830-900 ℃; The described coiling temperature batching in step is 600-700 ℃.
Under preferable case, molten steel composition after described steel-making is: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, 1.3-1.7 the Mn of % by weight, the Nb of 0.03-0.07 % by weight, the Ti of 0.05-0.1 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity; Finish rolling finishing temperature in described hot continuous rolling step is 850-890 ℃; The described coiling temperature batching in step is 630-670 ℃.
The type of cooling of batching preferably, in step is the cold type of cooling of layer after first rapid cooling.The cooling rate that described rapid cooling is preferably with 30-40 ℃/s is cooled to 760-800 ℃, and the cold cooling rate being preferably with 5-20 ℃/s of described layer is cooled to coiling temperature.
On the other hand, the invention provides a kind of automotive frame hot-rolled steel sheet being made by aforesaid method.
The present invention adopts niobium, titanium, manganese microalloying mode, the molten steel composition of controlling after steel-making is: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, the Mn of 1-2 % by weight, the Nb of 0.01-0.1 % by weight, the Ti of 0.03-0.12 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity, avoid adding the noble elements such as Mo, Ni, reduced production cost; Adopt the cold cooling controlling and rolling controlling process system of layer after high-temperature final rolling, high temperature coiling and first rapid cooling simultaneously, successfully produce with ferrite and pearlite and be organized as main 700MPa level High Strength Steel Plate, rolling technology is controlled simple, strong adaptability; The automotive frame that the inventive method is manufactured is high by hot-rolled steel sheet intensity, and stable mechanical property, anisotropy are little, and little with volume poor performance, obdurability coupling is good.The automotive frame that the inventive method is manufactured with hot-rolled steel sheet greatly abundant and perfect hot-rolled product structure.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
On the one hand, the invention provides the manufacture method of hot-rolled steel sheet for a kind of automotive frame, the method comprises makes steel step, continuous casting step, heating steps, hot continuous rolling step and batches step, and the molten steel composition after steel-making is: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, the Mn of 1-2 % by weight, the Nb of 0.01-0.1 % by weight, the Ti of 0.03-0.12 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity; Finish rolling finishing temperature in hot continuous rolling step is 830-900 ℃; The coiling temperature batching in step is 600-700 ℃.
According to the present invention, although make the molten steel composition after steel-making be: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, the Mn of 1-2 % by weight, the Nb of 0.01-0.1 % by weight, the Ti of 0.03-0.12 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity, and making the finish rolling finishing temperature in hot continuous rolling step is 830-900 ℃, the coiling temperature batching in step is 600-700 ℃, can realize object of the present invention, reduce production costs, rolling technology is controlled simple, and the automotive frame producing is high by hot-rolled steel sheet intensity, stable mechanical property, anisotropy is little, little with volume poor performance, obdurability coupling is good.But under preferable case, molten steel composition after steel-making is: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, 1.3-1.7 the Mn of % by weight, the Nb of 0.03-0.07 % by weight, the Ti of 0.05-0.1 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity, finish rolling finishing temperature in hot continuous rolling step is 850-890 ℃, and the coiling temperature batching in step is 630-670 ℃, can further improve intensity and toughness that the automotive frame of producing is used hot-rolled steel sheet.
In the present invention, for steel-making step, without particular requirement, can adopt the conventional process for making in this area, for example, through desulfurizing iron, converter smelting, LF stove Ca, process, by molten steel composition control, be: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, the Mn of 1-2 % by weight, the Nb of 0.01-0.1 % by weight, the Ti of 0.03-0.12 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity.
For continuous casting step, also can adopt the conventional continuous casting process in this area, for example, adopt whole argon gas-sealed casting, molten steel injects tundish by the slide gate nozzle of ladle bottom, tundish temperature is without particular requirement, for the conventional temperature adopting in this area, be for example 1530-1560 ℃, adopt funnel-type crystallizer, Casting speed is without particular requirement, for the conventional Casting speed adopting in this area, be for example 0.7-0.9m/min, the continuous casting steel billet thickness that continuous casting step obtains is preferably 200-250mm.
In the present invention, heating steps is preferably and makes strand soaking at 1220-1250 ℃ of temperature, soaking refers to carries out long thermal treatment to strand, what those skilled in the art should understand that is, the concrete time of soaking is relevant with the factors such as thickness of strand, as long as soaking makes strand integral body all reach Heating temperature, and be incubated certain hour (>=120min) to guarantee the whole solid solutions of microalloy element.
In the present invention, hot continuous rolling step is to make strand after heating after dephosphorize by high pressure water is removed the upper iron scale forming in surface, enter reversible roughing unit, the thickness of the intermediate blank after roughing is preferably 38-55mm, enter subsequently Coil Box, make to be with steel toe, tail transposing, then carry out finish rolling, after finish rolling, the thickness of steel plate is preferably 6-16mm.The temperature out of roughing, without particular requirement, can adopt the conventional temperature in this area, and for example roughing temperature out is 1025-1055 ℃.Finish rolling start rolling temperature is preferably 950-1020 ℃, and finish rolling finishing temperature is preferably 830-900 ℃, more preferably 850-890 ℃.
In the present invention, batching step is that coiled sheet batches the step of rolling by reeling machine through overcooling.For cooling mode, be preferably the cold type of cooling of layer after first rapid cooling, the cooling rate that rapid cooling is preferably with 30-40 ℃/s is cooled to 760-800 ℃ from finish rolling finishing temperature, and the cold cooling rate being preferably with 5-20 ℃/s of layer is cooled to coiling temperature from above-mentioned 760-800 ℃.Coiling temperature is 600-700 ℃, is preferably 630-670 ℃.
On the other hand, the present invention also provides a kind of automotive frame hot-rolled steel sheet being made by aforesaid method.This automotive frame is organized as ferrite and pearlite tissue with hot-rolled steel sheet, and under preferable case, the content of ferritic structure is 88-94 volume %, and the content of pearlitic structure is 6-12 volume %.The content of ferritic structure and pearlitic structure according in metallographic microstructure figure separately shared area percentage determine.The yield strength 710-770MPa of hot-rolled steel sheet for this automotive frame, tensile strength 780-850MPa, unit elongation 18-25%.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out arbitrary combination, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Embodiment
The present invention is further illustrated for following embodiment, but therefore do not limit the present invention.
In following embodiment and comparative example:
The measuring method of yield strength: GB/T 228-2002 metallic substance tensile test at room temperature method.
The measuring method of tensile strength: GB/T 228-2002 metallic substance tensile test at room temperature method.
The measuring method of unit elongation: GB/T 228-2002 metallic substance tensile test at room temperature method.
Embodiment 1
This embodiment is used for illustrating the manufacture method of hot-rolled steel sheet for automotive frame provided by the invention.
Molten steel composition after steel-making step is: the C of 0.05 % by weight, the Si of 0.21 % by weight, the Mn of 1.5 % by weight, the Nb of 0.05 % by weight, the Ti of 0.05 % by weight, the P of 0.01 % by weight, the S of 0.008 % by weight, surplus is Fe and inevitable impurity, then adopt whole argon gas-sealed casting, molten steel injects tundish by the slide gate nozzle of ladle bottom, tundish temperature is 1530 ℃, adopt funnel-type crystallizer, Casting speed is 0.7m/min, continuous casting steel billet thickness is 200mm, then soaking in the process furnace of 1220 ℃, strand after heating is after dephosphorize by high pressure water is removed the upper iron scale forming in surface, enter reversible roughing unit, roughing temperature out is 1025 ℃, the thickness of the intermediate blank after roughing is 38mm, enter subsequently Coil Box, make to be with steel toe, tail transposing, then carry out finish rolling, finish rolling start rolling temperature is 950 ℃, finish rolling finishing temperature is 850 ℃.After finish rolling, the thickness of steel plate is 6mm, then first with the cooling rate of 30 ℃/s, is cooled fast to 760 ℃, and then is cooled to 630 ℃ to carry out curling rolling and obtain finished product with the cooling rate of 5 ℃/s.From metallographic microstructure figure, be viewed as ferrite and pearlite tissue, the content of ferritic structure is 88 volume %, and the content of pearlitic structure is 12 volume %.From horizontal, oblique, vertically measure respectively coil of strip two ends and middle yield strength (ReL), tensile strength (Rm) and unit elongation (A) in Table 1.
Embodiment 2
This embodiment is used for illustrating the manufacture method of hot-rolled steel sheet for automotive frame provided by the invention.
Molten steel composition after steel-making step is: the C of 0.08 % by weight, the Si of 0.15 % by weight, the Mn of 1.3 % by weight, the Nb of 0.03 % by weight, the Ti of 0.1 % by weight, the P of 0.025 % by weight, the S of 0.005 % by weight, surplus is Fe and inevitable impurity, then adopt whole argon gas-sealed casting, molten steel injects tundish by the slide gate nozzle of ladle bottom, tundish temperature is 1550 ℃, adopt funnel-type crystallizer, Casting speed is 0.8m/min, continuous casting steel billet thickness is 250mm, then soaking in the process furnace of 1230 ℃, strand after heating is after dephosphorize by high pressure water is removed the upper iron scale forming in surface, enter reversible roughing unit, roughing temperature out is 1040 ℃, the thickness of the intermediate blank after roughing is 45mm, enter subsequently Coil Box, make to be with steel toe, tail transposing, then carry out finish rolling, finish rolling start rolling temperature is 1100 ℃, finish rolling finishing temperature is 870 ℃.After finish rolling, the thickness of steel plate is 10mm, then first with the cooling rate of 35 ℃/s, is cooled fast to 780 ℃, and then is cooled to 650 ℃ to carry out curling rolling and obtain finished product with the cooling rate of 15 ℃/s.From metallographic microstructure figure, be viewed as ferrite and pearlite tissue, the content of ferritic structure is 92 volume %, and the content of pearlitic structure is 8 volume %.From horizontal, oblique, vertically measure respectively coil of strip two ends and middle yield strength (ReL), tensile strength (Rm) and unit elongation (A) in Table 1.
Embodiment 3
This embodiment is used for illustrating the production method of hot-rolled steel sheet for automotive frame provided by the invention.
Molten steel composition after steel-making step is: the C of 0.1 % by weight, the Si of 0.35 % by weight, the Mn of 1.7 % by weight, the Nb of 0.07 % by weight, the Ti of 0.08 % by weight, the P of 0.02 % by weight, the S of 0.01 % by weight, surplus is Fe and inevitable impurity, then adopt whole argon gas-sealed casting, molten steel injects tundish by the slide gate nozzle of ladle bottom, tundish temperature is 1530 ℃, adopt funnel-type crystallizer, Casting speed is 0.7m/min, continuous casting steel billet thickness is 200mm, then soaking in the process furnace of 1250 ℃, strand after heating is after dephosphorize by high pressure water is removed the upper iron scale forming in surface, enter reversible roughing unit, roughing temperature out is 1025 ℃, the thickness of the intermediate blank after roughing is 55mm, enter subsequently Coil Box, make to be with steel toe, tail transposing, then carry out finish rolling, finish rolling start rolling temperature is 1020 ℃, finish rolling finishing temperature is 890 ℃.After finish rolling, the thickness of steel plate is 16mm, then first with the cooling rate of 40 ℃/s, is cooled fast to 800 ℃, and then is cooled to 670 ℃ to carry out curling rolling and obtain finished product with the cooling rate of 20 ℃/s.From metallographic microstructure figure, be viewed as ferrite and pearlite tissue, the content of ferritic structure is 94 volume %, and the content of pearlitic structure is 6 volume %.From horizontal, oblique, vertically measure respectively coil of strip two ends and middle yield strength (ReL), tensile strength (Rm) and unit elongation (A) in Table 1.
Table 1
As can be seen from Table 1, the automotive frame of the inventive method manufacture not only has high strength but also have high tenacity with hot-rolled steel sheet, and obdurability coupling is good; Laterally, oblique and vertical intensity and unit elongation be suitable, stable mechanical property, anisotropy is little; Coil of strip two ends and middle intensity and unit elongation are suitable, little with volume poor performance.
The present invention adopts niobium, titanium, manganese microalloying mode, the molten steel composition of controlling after steel-making is: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, the Mn of 1-2 % by weight, the Nb of 0.01-0.1 % by weight, the Ti of 0.03-0.12 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity, avoid adding the noble elements such as Mo, Ni, reduced production cost; Adopt the cold cooling controlling and rolling controlling process system of layer after high-temperature final rolling, high temperature coiling and first rapid cooling simultaneously, successfully produce with ferrite and pearlite and be organized as main 700MPa level High Strength Steel Plate, rolling technology is controlled simple, strong adaptability; The automotive frame that the inventive method is manufactured is high by hot-rolled steel sheet intensity, and stable mechanical property, anisotropy are little, and little with volume poor performance, obdurability coupling is good.The automotive frame that the inventive method is manufactured with hot-rolled steel sheet greatly abundant and perfect hot-rolled product structure.
Claims (9)
1. the manufacture method of hot-rolled steel sheet for an automotive frame, the method comprises steel-making step, continuous casting step, heating steps, hot continuous rolling step and batches step, it is characterized in that, the molten steel composition after described steel-making is: the C of 0.05-0.1 % by weight, the Si of 0.15-0.35 % by weight, 1.3-1.7 the Mn of % by weight, the Nb of 0.03-0.07 % by weight, the Ti of 0.05-0.1 % by weight, the P of≤0.025 % by weight, the S of≤0.01 % by weight, surplus is Fe and inevitable impurity; Finish rolling finishing temperature in described hot continuous rolling step is 850-890 ℃; The described coiling temperature batching in step is 630-670 ℃;
Wherein, described in to batch the type of cooling in step be the cold type of cooling of layer after first rapid cooling, described rapid cooling is cooled to 760-800 ℃ for the cooling rate with 30-40 ℃/s, described layer is cold is cooled to coiling temperature for the cooling rate with 5-20 ℃/s.
2. method according to claim 1, wherein, the finish rolling start rolling temperature in described hot continuous rolling step is 950-1020 ℃.
3. method according to claim 1, wherein, in described hot continuous rolling step, after roughing, the thickness of intermediate blank is 38-55mm, after finish rolling, the thickness of steel plate is 6-16mm.
4. method according to claim 1, wherein, described heating steps is for making strand soaking at 1220-1250 ℃ of temperature.
5. method according to claim 1, wherein, the continuous casting steel billet thickness that described continuous casting step obtains is 200-250mm.
6. an automotive frame hot-rolled steel sheet, is characterized in that, described automotive frame makes by hot-rolled steel sheet method described in any one in claim 1-5.
7. automotive frame hot-rolled steel sheet according to claim 6, wherein, this automotive frame is organized as ferrite and pearlite tissue with hot-rolled steel sheet.
8. automotive frame hot-rolled steel sheet according to claim 7, wherein, the content of described ferritic structure is 88-94 volume %, the content of described pearlitic structure is 6-12 volume %.
9. according to the automotive frame hot-rolled steel sheet described in any one in claim 6-8, wherein, the yield strength 710-770MPa of hot-rolled steel sheet for this automotive frame, tensile strength 780-850MPa, unit elongation 18-25%.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151913A (en) * | 1996-08-29 | 1997-06-18 | 攀枝花钢铁（集团）公司钢铁研究院 | Prodn of steel plate for automobile girder |
| CN101153371A (en) * | 2006-09-27 | 2008-04-02 | 宝山钢铁股份有限公司 | High-strength cold-formed hot continuous rolled steel plate and method of preparing the same |
| 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 automotive frame |
| CN101920278A (en) * | 2009-06-17 | 2010-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for hot-rolled steel plates for automobiles |
-
2011
- 2011-09-21 CN CN201110282100.4A patent/CN103014494B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151913A (en) * | 1996-08-29 | 1997-06-18 | 攀枝花钢铁（集团）公司钢铁研究院 | Prodn of steel plate for automobile girder |
| CN101153371A (en) * | 2006-09-27 | 2008-04-02 | 宝山钢铁股份有限公司 | High-strength cold-formed hot continuous rolled steel plate and method of preparing the same |
| 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 automotive frame |
| CN101920278A (en) * | 2009-06-17 | 2010-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for hot-rolled steel plates for automobiles |
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