CN102199727A - 400MPa high-strength and high-forming-performance cold rolled steel plate and production method thereof - Google Patents
400MPa high-strength and high-forming-performance cold rolled steel plate and production method thereof Download PDFInfo
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- CN102199727A CN102199727A CN 201110126624 CN201110126624A CN102199727A CN 102199727 A CN102199727 A CN 102199727A CN 201110126624 CN201110126624 CN 201110126624 CN 201110126624 A CN201110126624 A CN 201110126624A CN 102199727 A CN102199727 A CN 102199727A
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Abstract
The invention discloses a 400MPa high-strength and high-forming-performance cold rolled steel plate, which mainly comprises the following chemical components in percentage by weight: less than or equal to 0.004 percent of C, 0.1 to 0.4 percent of Si, 0.1 to 1.0 percent of Mn, 0.01 to 0.1 percent of P, less than or equal to 0.030 percent of S, 0.01 to 0.05 percent of Al, 0.01 to 0.1 percent of Ti, less than or equal to 0.005 percent of N and 0.0004 to 0.0012 percent of B. By combining rolling, cold rolling and continuous annealing processes, the yield strength of the cold rolled plates reaches 210 to 310MPa, the tensile strength is more than or equal to 400MPa, the coefficient of elongation is more than or equal to 32 percent, the n90 content is more than or equal to 0.15 percent and the r90 content is more than or equal to 1.8; desirable plate shape, surface quality, impact performance and welding performance are ensured; overhigh requirements on production processes are avoided, and the operation is feasible; and the production cost is lowered, and the cold rolled steel plates have high strength and high cold forming performance.
Description
Technical field
The invention belongs to the technical field of metallurgical industry product and manufacturing process thereof, relate to cold-rolled steel sheet and manufacturing technology thereof, more particularly, the present invention relates to a kind of 400MPa grade high-strength high formability energy cold-rolled steel sheet product, in addition, the invention still further relates to the production method of this cold-rolled steel sheet.
Background technology
Along with the raising of automotive industry to light-weighted requirements such as energy-saving and emission-reduction, reduction deadweights, the demand of high strength cold rolled steel plate increases day by day, and accounting for the thin plate of vehicle weight more than 60% is the key of loss of weight.
Adding phosphor intensified cold rolling high strength steel plate is a kind of high strength cold-rolled plate of present automobile panel and structural part consumption maximum, accounts for more than 80% of high Strength Steel for Motor Vehicles.Domestic iron and steel enterprises and scientific research institutions are from twentieth century eighties to the development of the high tensile steel plate that phosphorates, ground the associating of total institute by Wuhan Iron and Steel Plant, Second Automobile Works, steel at that time, and Anshan iron and steel plant, a vapour, Shenyang metal are united, form the two groups of situations of tackling key problems simultaneously, walking abreast research and development in north and south, all developed high strength phosphorated high strength cold-rolled plate; Afterwards, along with comprehensive completion of Baosteel engineering, the series high strength cold-rolled product that phosphorates had successfully been developed at Baosteel in north and south interflow, and successfully utilization and vehicle exterior cladding element and structural part are distinguished parts such as punching out vehicle body and underbody.
At present, the domestic high strength cold-rolled plate that phosphorates is divided into two big series, the one, based on carbon aluminium-killed steel, form general structural part, the 2nd, be that the basis forms the cold-rolled high-strength phosphorated steel that deep-draw is used with the ultra low carbon IF steel, the main trade mark has 340MPa, 390MPa, other series product of 440MPa grade, and its performance has all reached the level of external like product, satisfied the different demands of automotive industry, high tensile steel plate has been established solid basis in the application of automotive industry in order to phosphorate.
China Patent No. be CN1661127A's " high strength cold rolled steel plate and manufacture method thereof ", set forth by Composition Control and controlled rolling and controlled cooling, realize refined crystalline strengthening, solution strengthening and precipitation strength, the high-intensity steel plate that obtains having good deep draw plasticity.Its composition requires: C:0.015% is following, Si:1.5% is following, Mn:0.4～3%, P:0.15% is following, S:0.02% is following, sol.Al:0.1～1%, N:0.01% is following, Ti:0.2% is following, surplus Fe and unavoidable impurities, and satisfy 1≤([Ti]/48)/([C]/12+[N]/14), wherein, the content of [M] expression element M.
China Patent No. be CN1492068A's " high strength cold rolled steel plate and manufacture method thereof ", equally also show by Composition Control and controlled rolling and controlled cooling, can produce the high-intensity steel plate of good deep draw plasticity, its composition requires: C:0.0040～0.01%, Si:0.05% are following, Mn:0.1～1.0%, P:0.01～0.05%, S:0.02% are following, sol.Al:0.01～0.1%, following, Nb:0.01～0.14% of N:0.004%, and all the other come down to Fe and unavoidable impurities.
The steel that these two patented technologies provide can satisfy the manufacturing of the high-intensity steel plate of deep draw plasticity, but come with some shortcomings: 1, tensile strength is on the low side; 2, added a large amount of Nb elements, cost is higher.
Summary of the invention
The problem that the present invention at first will solve provides a kind of 400MPa grade high-strength high formability can cold-rolled steel sheet, its objective is improve the quality of products, processing performance and reducing cost.
To achieve these goals, the technical scheme taked of the present invention is:
The main chemical compositions weight percent of above-described 400MPa grade high-strength high formability energy cold-rolled steel sheet is:
C≤0.004％；Si：0.10％～0.40％；Mn：0.1％～1.0％；P：0.010％～0.100％；S≤0.030％；Al：0.010％～0.050％；Ti：0.01％～0.10％；N≤0.005％；B：0.0004～0.0012％。
In order to realize the goal of the invention identical with technique scheme, the present invention also provides the production method that above-mentioned 400MPa grade high-strength high formability can cold-rolled steel sheet, and its technical scheme is that the technological process and the technology content of described production method is:
1, hot metal pretreatment: skim before the requirement and after skim;
2, converter smelting: adopt the self-circulation steel scrap; Tapping adds lime, not to deoxidation of molten steel; Strengthen tapping pushing off the slag operation simultaneously;
3, alloy fine setting station: carry out the ladle top slag upgrading;
4, RH stove refining:, then be blown into oxygen in the decarburization prometaphase as the need oxygen blast; Add steel scrap as need, add in the decarburization prometaphase; Notice that FeB adds mode and weighing precision; Add ferro-titanium; The broken unprecedented 5min that guarantees to be not less than clean cycling time.
5, continuous casting: middle bag target temperature is controlled at above 20 ℃～40 ℃ of liquidus temperature, adopts the protection cast, and the molten steel recarburization amount is less than 15ppm after the control RH departures;
6, the strand tapping temperature is controlled at 1190 ℃～1250 ℃;
7, finishing temperature is controlled at 880 ℃～950 ℃;
8, coiling temperature is controlled at 650 ℃～720 ℃;
9, annealing temperature is controlled at 760 ℃～850 ℃;
10, slow cooling temperature is controlled at 600 ℃～750 ℃, and fast cold temperature is controlled at 350 ℃～450 ℃, and the overaging temperature is controlled at 340 ℃～380 ℃.
The present invention adopts technique scheme, and the yield strength of described cold-rolled steel sheet is 210～310MPa, tensile strength 〉=400Mpa, unit elongation 〉=32%, n90 〉=0.15, r90 〉=1.8; Guarantee good plate shape, surface quality, punching performance and welding property simultaneously; In addition, do not have too high requirement for production technique, operation possesses feasibility; Reduce production cost, made this cold-rolled steel sheet good cold shaping performance also be arranged having a high-intensity while.
Embodiment
Description below by to embodiment is described in further detail the specific embodiment of the present invention, to help those skilled in the art inventive concept of the present invention, technical scheme is had more complete, accurate and deep understanding.
The present invention is to provide a kind of 400MPa grade high-strength high formability energy cold-rolled steel sheet, and the production method of this cold-rolled steel sheet.
In order to solve the problem that exists at the described present known technology of this specification sheets background technology part and to overcome its defective, realize improving the quality of products, processing performance and the goal of the invention that reduces cost, the technical scheme that the present invention takes is:
The main chemical compositions weight percent of above-described 400MPa grade high-strength high formability energy cold-rolled steel sheet is:
C≤0.004％；Si：0.10％～0.40％；Mn：0.1％～1.0％；P：0.010％～0.100％；S≤0.030％；Al：0.010％～0.050％；Ti：0.01％～0.10％；N≤0.005％；B：0.0004％～0.0012％。
Adopt technique scheme,, add the chemical composition design of a small amount of Ti by reducing C content, cooperate hot rolling, cold rolling and continuous annealing process, the yield strength that makes described cold-rolled steel sheet is 210～310MPa, tensile strength 〉=400Mpa, unit elongation 〉=32%, n90 〉=0.15, r90 〉=1.8; Guarantee good plate shape, surface quality, punching performance and welding property simultaneously; In addition, do not have too high requirement for production technique, operation possesses feasibility; Reduce production cost, made this cold-rolled steel sheet good cold shaping performance also be arranged having a high-intensity while.
In order to realize the goal of the invention identical with technique scheme, the present invention also provides the production method that above-mentioned 400MPa grade high-strength high formability can cold-rolled steel sheet.Checking by experiment, described production method adopt following technological process and technology content can obtain best effect:
1, hot metal pretreatment: skim before the requirement and after skim;
2, converter smelting: adopt the self-circulation steel scrap; Tapping adds lime, not to deoxidation of molten steel; Strengthen tapping pushing off the slag operation simultaneously;
3, alloy fine setting station: carry out the ladle top slag upgrading;
4, RH stove refining:, then be blown into oxygen in the decarburization prometaphase as the need oxygen blast; Add steel scrap as need, add in the decarburization prometaphase; Notice that FeB adds mode and weighing precision; Add ferro-titanium; The broken unprecedented 5min that guarantees to be not less than clean cycling time.
5, continuous casting: middle bag target temperature is controlled at above 20 ℃～40 ℃ of liquidus temperature, adopts the protection cast, and the molten steel recarburization amount is less than 15ppm after the control RH departures;
6, the strand tapping temperature is controlled at 1190 ℃～1250 ℃;
7, finishing temperature is controlled at 880 ℃～950 ℃;
8, coiling temperature is controlled at 650 ℃～720 ℃;
9, annealing temperature is controlled at 760 ℃～850 ℃; Annealing temperature mainly impels the steel plate after cold rolling to organize recrystallize, and temperature crosses that low then recrystallize is incomplete, therefore requires annealing temperature to be controlled at 760 ℃～850 ℃;
10, slow cooling temperature is controlled at 600 ℃～750 ℃, and fast cold temperature is controlled at 350 ℃～450 ℃, and the overaging temperature is controlled at 340 ℃～380 ℃.In the setting of slow cooling temperature and fast cold temperature, requirement is in the steel plate of two-phase region with temperature drop speed cooling faster when allowing annealing, help the refinement of crystal grain like this, therefore the present invention requires the slow cooling temperature to be controlled at 600 ℃～750 ℃, fast cold temperature is controlled at 350 ℃～450 ℃, and the overaging temperature is controlled at 340 ℃～380 ℃.
The present invention relies on constituent contents such as adding Mn, Si, P and annealing process control on the basis of ultra low carbon IF steel, promptly can guarantee the production of this cold-rolled steel sheet.
Above the present invention has been carried out exemplary description; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (2)
1. a 400MPa grade high-strength high formability can cold-rolled steel sheet, it is characterized in that the main chemical compositions weight percent of described this cold-rolled steel sheet is:
C≤0.004％；Si：0.10％～0.40％；Mn：0.1％～1.0％；P：0.010％～0.100％；S≤0.030％；Al：0.010％～0.050％；Ti：0.01％～0.10％；N≤0.005％；B：0.0004％～0.0012％。
2. the production method that the described 400MPa grade high-strength of claim 1 high formability can cold-rolled steel sheet is characterized in that the technological process of described production method and technology content are:
1), hot metal pretreatment: skim before the requirement and after skim;
2), converter smelting: adopt the self-circulation steel scrap; Tapping adds lime, not to deoxidation of molten steel; Strengthen tapping pushing off the slag operation simultaneously;
3), alloy fine setting station: carry out the ladle top slag upgrading;
4), RH stove refining:, then be blown into oxygen in the decarburization prometaphase as the need oxygen blast; Add steel scrap as need, add in the decarburization prometaphase; Notice that FeB adds mode and weighing precision; Add ferro-titanium; The broken unprecedented 5min that guarantees to be not less than clean cycling time.
5), continuous casting: middle bag target temperature is controlled at above 20 ℃～40 ℃ of liquidus temperature, adopts the protection cast, and the molten steel recarburization amount is less than 15ppm after the control RH departures;
6), the strand tapping temperature is controlled at 1190 ℃～1250 ℃;
7), finishing temperature is controlled at 880 ℃～950 ℃;
8), coiling temperature is controlled at 650 ℃～720 ℃;
9), annealing temperature is controlled at 760 ℃～850 ℃;
10), the slow cooling temperature is controlled at 600 ℃～750 ℃, fast cold temperature is controlled at 350 ℃～450 ℃, the overaging temperature is controlled at 340 ℃～380 ℃.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925796A (en) * | 2012-10-30 | 2013-02-13 | 鞍钢股份有限公司 | Non-alloyed ultra-low carbon cold-rolled sheet for structure and production method thereof |
| CN103509997A (en) * | 2013-09-25 | 2014-01-15 | 马钢(集团)控股有限公司 | 440MPa-class cold-rolled high-intensity automobile structural steel and manufacturing method thereof |
| CN103602896A (en) * | 2013-12-06 | 2014-02-26 | 马钢(集团)控股有限公司 | Production method of boron-containing tube-making steel band |
| CN105215309A (en) * | 2015-11-11 | 2016-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that big cross section Properties of Heavy Rail Steel center segregation of casting blank controls |
| CN106282795A (en) * | 2016-08-30 | 2017-01-04 | 唐山钢铁集团有限责任公司 | A kind of high-strength IF steel band and hot rolling production method thereof |
| CN106702268A (en) * | 2017-02-14 | 2017-05-24 | 唐山钢铁集团有限责任公司 | 390MPa-level high-strength IF (Interstitial-Free) steel and production method thereof |
| CN110358979A (en) * | 2019-07-30 | 2019-10-22 | 包头钢铁（集团）有限责任公司 | A kind of 400MPa grades of Cold Rolled High Strength IF Steel and preparation method thereof |
| CN111748735A (en) * | 2020-06-22 | 2020-10-09 | 武汉钢铁有限公司 | Band steel with excellent low-temperature secondary processing performance and tensile strength of 390MPa and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05339643A (en) * | 1992-06-08 | 1993-12-21 | Kawasaki Steel Corp | Production of high strength cold rolled steel sheet excellent in deep drawability and galvanized steel sheet |
| JP2000313945A (en) * | 1999-03-04 | 2000-11-14 | Nkk Corp | Steel sheet for heat shrink band, and its manufacture |
| CN101684533A (en) * | 2008-09-27 | 2010-03-31 | 鞍钢股份有限公司 | High-strength cold-rolled sheet having excellent formability and method for producing same |
| CN101684532A (en) * | 2008-09-27 | 2010-03-31 | 鞍钢股份有限公司 | Enamel steel for cold-rolled water heater and production method |
-
2011
- 2011-05-17 CN CN 201110126624 patent/CN102199727B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05339643A (en) * | 1992-06-08 | 1993-12-21 | Kawasaki Steel Corp | Production of high strength cold rolled steel sheet excellent in deep drawability and galvanized steel sheet |
| JP2000313945A (en) * | 1999-03-04 | 2000-11-14 | Nkk Corp | Steel sheet for heat shrink band, and its manufacture |
| CN101684533A (en) * | 2008-09-27 | 2010-03-31 | 鞍钢股份有限公司 | High-strength cold-rolled sheet having excellent formability and method for producing same |
| CN101684532A (en) * | 2008-09-27 | 2010-03-31 | 鞍钢股份有限公司 | Enamel steel for cold-rolled water heater and production method |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925796A (en) * | 2012-10-30 | 2013-02-13 | 鞍钢股份有限公司 | Non-alloyed ultra-low carbon cold-rolled sheet for structure and production method thereof |
| CN102925796B (en) * | 2012-10-30 | 2014-07-09 | 鞍钢股份有限公司 | Non-alloyed ultra-low carbon cold-rolled sheet for structure and production method thereof |
| CN103509997A (en) * | 2013-09-25 | 2014-01-15 | 马钢(集团)控股有限公司 | 440MPa-class cold-rolled high-intensity automobile structural steel and manufacturing method thereof |
| CN103509997B (en) * | 2013-09-25 | 2016-02-10 | 马钢(集团)控股有限公司 | A kind of 440MPa level cold-rolled high-strength automobile structural steel and manufacture method thereof |
| CN103602896A (en) * | 2013-12-06 | 2014-02-26 | 马钢(集团)控股有限公司 | Production method of boron-containing tube-making steel band |
| CN105215309A (en) * | 2015-11-11 | 2016-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that big cross section Properties of Heavy Rail Steel center segregation of casting blank controls |
| CN106282795A (en) * | 2016-08-30 | 2017-01-04 | 唐山钢铁集团有限责任公司 | A kind of high-strength IF steel band and hot rolling production method thereof |
| CN106702268A (en) * | 2017-02-14 | 2017-05-24 | 唐山钢铁集团有限责任公司 | 390MPa-level high-strength IF (Interstitial-Free) steel and production method thereof |
| CN110358979A (en) * | 2019-07-30 | 2019-10-22 | 包头钢铁（集团）有限责任公司 | A kind of 400MPa grades of Cold Rolled High Strength IF Steel and preparation method thereof |
| CN111748735A (en) * | 2020-06-22 | 2020-10-09 | 武汉钢铁有限公司 | Band steel with excellent low-temperature secondary processing performance and tensile strength of 390MPa and production method thereof |
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