CN101649381B - Method for producing secondary cold-rolling tinning original plate - Google Patents
Method for producing secondary cold-rolling tinning original plate Download PDFInfo
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- CN101649381B CN101649381B CN2009100639368A CN200910063936A CN101649381B CN 101649381 B CN101649381 B CN 101649381B CN 2009100639368 A CN2009100639368 A CN 2009100639368A CN 200910063936 A CN200910063936 A CN 200910063936A CN 101649381 B CN101649381 B CN 101649381B
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Abstract
The invention discloses a method for producing a secondary cold-rolling tinning original plate. The method comprises the following steps: after desulfurizing the molten iron, carrying out repeated blowing smelting and vacuum processing by a convertor and then controlling the weight percent of the chemical components of a steel product to meet the following proportion: 0.05-0.13% of C, at most 0.030% of Si, 0.60% of Mn, at most 0.020% of P, at most 0.050% of S and the balance of Fe and unavoidable impurities after hot rolling; washing the steel product by dilute acid, then carrying out cold rolling for the first time by an HC rolling machine, adding up the relative draught and controlling at 85-90%; then, annealing in a full hydrogen furnace enclosure type and controlling the annealing temperature between 510 DEG C and 560 DEG C; afterwards, carrying out cold rolling for the second time by the HC rolling machine, adding up the relative draught and controlling at 30-40%; and finally, obtaining the secondary cold-rolling tinning original plate by double-machine flattening. Experiments prove that the secondary cold-rolling tinning original plate produced by the method has the advantages of small thickness, high hardness, good corrosion-resisting properties and deep-punching processing performance and the like.
Description
Technical field
The invention belongs to smelting iron and steel material field, be specifically related to a kind of production method of secondary cold-rolling tinning original plate.
Background technology
Adopt cover surplus the secondary cold-rolling production line about 40 of special-purpose DCR (the Double Cold Reduction) unit of secondary cold-rolling at present in the world, mainly be distributed in areas such as North America, East Asia and Europe.The 1220 two-shipper frame secondary cold-rollings that domestic Baosteel cold rolled sheet factory the adopts smooth unit of holding concurrently is domestic article one DCR unit, introduced from Mitsubishi Hitachi, Ltd in 2003, be one of state-of-the-art in the world at present secondary cold-rolling six roller UCM milling trains, possess secondary cold-rolling, wet smooth and dried smooth function.
Secondary cold-rolling tin plate production difficulty is big, quality control requirement is high because of bell-type annealing (BA) mode is produced, external numerous producer has abandoned the research and development of bell-type annealing mode secondary cold-rolling tin plate, and the numerous and confused continuous annealing mode (CA) that is more prone to control that adopts is produced the secondary cold-rolling tin plate.But, the secondary cold-rolling tin plate that the secondary cold-rolling tin plate that continuous annealing mode is produced is produced not as bell-type annealing on deep drawability, still there is a large amount of customer needs in bell-type annealing secondary cold-rolling tin plate.And invest newly-built continuous annealing and the special-purpose DCR unit of secondary cold-rolling production line, will expend huge financial resources and manpower.Therefore, the high rigidity secondary cold-rolling tinning original plate becomes the technical problem that urgent need is captured how to adopt the reversible HC milling train of bell-type annealing mode and six rollers to produce as thin as a wafer.
Summary of the invention
The object of the present invention is to provide a kind of production method of secondary cold-rolling tinning original plate, the secondary cold-rolling tinning original plate thickness that this method is produced as thin as a wafer and its Rockwell hardness number can reach 75～79.
For achieving the above object, the production method of the secondary cold-rolling tinning original plate that the present invention is designed may further comprise the steps:
1) desulfurizing iron is after smelting and vacuum-treat are blown in converter again, control chemical composition of steel weight percent satisfies after hot rolling again: C:0.05～0.13, Si≤0.030, Mn≤0.60, P≤0.020, S≤0.050, and all the other are Fe and unavoidable impurities;
2) steel are cleaned with clear water after diluted acid cleans;
3) it is cold rolling with the HC milling train steel to be carried out the first time, and the accumulative total draft is controlled at 85～90%;
4) steel are through the annealing of perhydro bonnet formula, and annealing temperature is controlled between 510～560 ℃;
5) it is cold rolling with the HC milling train steel to be carried out the second time, and draft is controlled at 30～40%;
6) smooth through two-shipper, the thickness of control steel is 0.15～0.18mm, gets product.
Further, above-mentioned steps 4) in annealing time be controlled at 15～30h.
The principle that every technical parameter limits in the mechanism of the starting material soft steel chemical ingredients of selecting for use among the present invention and the production method is as follows:
C is one of element of indispensable raising steel strength in the steel, along with the increase of carbon content, and cementite Fe in the steel
3C increases, and hardness also increases, but its cold working (punching press, drawing) simultaneously and welding property degenerate.Therefore, secondary cold-rolling tinning original plate of the present invention is selected soft steel for use, and its carbon content is 0.05～0.13%, can guarantee that cold rolling raw sheet has cold-forming property preferably.
Si is remarkable to the solidity to corrosion influence of tin plate, and the solidity to corrosion of tin plate descends with the rising of Si content.Therefore, for guaranteeing the solidity to corrosion of uncoated tinplate base, Si content is carried out strict control, Si content≤0.030%.
Mn energy reinforced ferrite, but also solid solution increases the hardness of tin plate base material, in addition, adds manganese can prevent to cause because of sulphur steel when hot-work embrittlement in the steel.But the content height of uncoated tinplate base Mn, the solidity to corrosion of tin plate descends, so Mn content be controlled to be≤0.60%.
P because segregation takes place phosphorus easily, and causes corrosion resisting property to reduce, and for the tin plate raw sheet, the content of phosphorus is preferably low as far as possible.So P content is controlled to be≤and 0.020%.
S, in general, the content of sulphur is the smaller the better.The segregation of S tendency is big in the steel, and it is necessary taking off S.Therefore S content content be controlled to be≤0.050%.
It is cold rolling to adopt the HC milling train to carry out the first time to low-carbon hot-rolled steel in the production method of the present invention.Tin plate once cold rolling deflection is big more, and the broken thin degree of crystal grain is just big more, the amount of subgrain boundary just the more, lattice defects such as dislocation just the more, the unstable of tissue is just higher, zinc-plated former intensity of pulling and plasticity all can improve.Therefore, the first time of the present invention, cold rolling accumulative total draft was controlled to be 85～90% moderate finite deformation amount.
Steel plate becomes the band steel of fibrous tissue after once cold rolling, dislocation desity sharply raises, the also corresponding rapid increase of its intensity, for making the band steel recover plasticity, reduce hardness, obtains stable tissue and performance, the coil of strip need after cold rolling carry out recrystallization annealing through the perhydro bell furnace.Facts have proved that when the once cold rolling deflection was big, along with recrystallization temperature reduces, recrystallization nucleus was also along with increase, the crystal grain after the recrystallize heal tiny evenly, but when annealing temperature below 510 ℃ the time, recrystallize percentage ratio is less.So the present invention is controlled at low scope between 510～560 ℃ in the temperature of for the first time cold rolling back perhydro bell-type annealing.The full-hydrogen hood-type annealing furnace temperature is more even, there is not the local superheating phenomenon during heating, and along with the annealing time proper extension, the recrystallize percentage ratio of band steel increases, and annealing post gap atom content is low, the carbide alligatoring, it is even to improve band coil of strip mechanical property better, strengthen its deep drawability, therefore, among the present invention annealing time is controlled at 15～30 hours scopes.
Band steel behind the perhydro bell-type annealing is softer, and carrying out cold rolling main effect for the second time after the annealing again is to make the further attenuate of band steel by reroll, improves the hardness of band steel, improves the planeness of band steel and obtains the required surfaceness of user.The second time among the present invention, cold rolling draft was controlled at 30～40%, and energy attenuate belt steel thickness improves band steel hardness, makes the band steel not become fibrous tissue simultaneously after for the second time cold rolling.
The secondary cold-rolling tinning original plate that utilizes production method of the present invention to produce has following advantage: thin thickness helps the user and reduces cost; The hardness height, corrosion resistance and good helps the user and uses this high rigidity secondary cold-rolling tin plate to make can body; Deep drawability can be good, helps the user and process use, saves use cost.
Embodiment
Be described in further detail below in conjunction with the production method of specific embodiment secondary cold-rolling tinning original plate of the present invention:
Embodiment 1:
1) desulfurizing iron is after smelting and vacuum-treat are blown in converter again, and the weight percent of control steel chemical ingredients satisfies after hot rolling again: C:0.05, Si:0.007, Mn:0.6, P:0.016, S:0.007, all the other are Fe and unavoidable impurities.
2) soft steel is cleaned with the plug-type cleaning of 10% dilute hydrochloric acid back clear water.
3) it is cold rolling to carry out the first time with the HC milling train, and the accumulative total draft is 85%.
4) perhydro bonnet formula annealing behind the electrolytic degreasing, annealing temperature is 550～560 ℃, annealing time is 30h.
5) it is cold rolling to carry out the second time with the HC milling train, and draft is 30%.
6) two-shipper is smooth, and smooth back control thickness is 0.18mm.
By the thick high strength secondary cold-rolling tinning original plate of 0.18mm that this method is produced, after testing, its Rockwell hardness number is 75, and pickling time lag is 2.0s, and Erichsen number is 5.0mm.
Embodiment 2:
1) desulfurizing iron is after smelting and vacuum-treat are blown in converter again, and the weight percent of control steel chemical ingredients satisfies after hot rolling again: C:0.070, Si:0.005, Mn:0.47, P:0.020, S:0.05, all the other are Fe and unavoidable impurities.
2) soft steel clear water after the plug-type cleaning of 10% dilute hydrochloric acid is cleaned.
3) it is cold rolling to carry out the first time with the HC milling train, and the accumulative total draft is 90%.
4) perhydro bonnet formula annealing behind the electrolytic degreasing, annealing temperature is 540～550 ℃, annealing time is 15h.
5) it is cold rolling to carry out the second time with the HC milling train, and draft is 35.8%.
6) two-shipper is smooth, and smooth back control thickness is 0.15mm.
By the thick high strength secondary cold-rolling tinning original plate of 0.15mm that this method is produced, after testing, its Rockwell hardness number is 78, and pickling time lag is 1.5s, and Erichsen number is 4.5mm.
Embodiment 3:
1) desulfurizing iron is after smelting and vacuum-treat are blown in converter again, and the weight percent of control steel chemical ingredients satisfies after hot rolling again: C:0.072, Si:0.006, Mn:0.49, P:0.02, S:0.005, all the other are Fe and unavoidable impurities.
2) soft steel clear water after the plug-type cleaning of 10% dilute hydrochloric acid is cleaned.
3) it is cold rolling to carry out the first time with the HC milling train, and the accumulative total draft is 86.8%.
4) perhydro bonnet formula annealing behind the electrolytic degreasing, annealing temperature is 530～540 ℃, annealing time is 20h.
5) it is cold rolling to carry out the second time with the HC milling train, and draft is 34.3%.
6) two-shipper is smooth, and smooth back control thickness is 0.16mm.
By the thick high rigidity secondary cold-rolling tinning original plate of 0.16mm that this method is produced, after testing, its Rockwell hardness number is 77, and pickling time lag is 1.5s, and Erichsen number is 4.3mm.
Embodiment 4:
1) desulfurizing iron is after smelting and vacuum-treat are blown in converter again, and the weight percent of control steel chemical ingredients satisfies after hot rolling again: C:0.13, Si:0.008, Mn:0.60, P:0.013, S:0.005, all the other are Fe and unavoidable impurities.
2) soft steel clear water after the plug-type cleaning of 10% dilute hydrochloric acid is cleaned.
3) it is cold rolling to carry out the first time with the HC milling train, and the accumulative total draft is 87.2%.
4) perhydro bonnet formula annealing behind the electrolytic degreasing, annealing temperature is 510～520 ℃, annealing time is 20h.
5) it is cold rolling to carry out the second time with the HC milling train, and draft is 40%.
6) two-shipper is smooth, and smooth back control thickness is 0.15mm.
By the thick high rigidity secondary cold-rolling tinning original plate of 0.15mm that this method is produced, after testing, its Rockwell hardness number is 79, and pickling time lag is 1.0s, and Erichsen number is 4.0mm.
Claims (1)
1. the production method of a secondary cold-rolling tinning original plate may further comprise the steps:
1) desulfurizing iron is after smelting and vacuum-treat are blown in converter again, and the weight percent of control steel chemical ingredients satisfies after hot rolling again: C:0.13, Si:0.008, Mn:0.60, P:0.013, S:0.005, and all the other are Fe and unavoidable impurities;
2) soft steel clear water after the plug-type cleaning of 10% dilute hydrochloric acid is cleaned;
3) it is cold rolling to carry out the first time with the HC milling train, and the accumulative total draft is 87.2%;
4) perhydro bonnet formula annealing behind the electrolytic degreasing, annealing temperature is 510～520 ℃, annealing time is 20h;
5) it is cold rolling to carry out the second time with the HC milling train, and draft is 40%;
6) two-shipper is smooth, and smooth back control thickness is 0.15mm.
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| CN2009100639368A CN101649381B (en) | 2009-09-10 | 2009-09-10 | Method for producing secondary cold-rolling tinning original plate |
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| CN101649381B true CN101649381B (en) | 2011-06-22 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102234736A (en) * | 2010-04-22 | 2011-11-09 | 宝山钢铁股份有限公司 | Secondary cold-rolled high-hardness stamping steel with high isotropy and manufacturing method thereof |
| CN102794301B (en) * | 2012-08-03 | 2014-07-09 | 莱芜市泰山冷轧板有限公司 | Manufacture method of cold-rolled electrolytic tin substrate |
| CN102923819A (en) * | 2012-11-09 | 2013-02-13 | 无锡电站辅机厂 | Spherical tank |
| RU2607971C1 (en) * | 2013-04-09 | 2017-01-11 | Икк Корпорейшн | Zipper element and alloy for production thereof |
| CN103469062A (en) * | 2013-09-09 | 2013-12-25 | 武汉钢铁(集团)公司 | Isotropic cold-rolled soft tinned plate and production method thereof |
| CN103866182B (en) * | 2014-03-20 | 2016-04-27 | 莱芜钢铁集团有限公司 | Based on the 700MPa level cold rolling high strength steel of bell-type annealing process and the low-cost manufacture method of thin steel band |
| CN104018084B (en) * | 2014-06-23 | 2016-02-24 | 武汉钢铁(集团)公司 | The ornamental tie of a kind of tensile strength >=950MPa and production method thereof |
| CN105220063A (en) * | 2014-06-24 | 2016-01-06 | 上海梅山钢铁股份有限公司 | Resistance to marine environment steel of a kind of low cost and preparation method thereof |
| CN104060159A (en) * | 2014-06-26 | 2014-09-24 | 宝山钢铁股份有限公司 | Base plate of double-cold-rolled tinned plate and manufacturing method thereof, and double-cold-rolled tinned plate |
| CN106086643B (en) | 2016-06-23 | 2018-03-30 | 宝山钢铁股份有限公司 | The uncoated tinplate base and its secondary cold-rolling method of a kind of high-strength high-elongation |
| CN107177788B (en) * | 2017-06-01 | 2019-05-24 | 首钢集团有限公司 | A kind of secondary cold-rolling tin plate and its production method |
| CN109628716A (en) * | 2018-12-29 | 2019-04-16 | 江苏科茂新材料科技有限公司 | High-performance tinplate production technology |
| CN117004890B (en) * | 2023-06-29 | 2024-04-02 | 邯郸市金泰包装材料有限公司 | Tinned iron for high-tin-content aerosol valve and manufacturing method thereof |
| CN117327990B (en) * | 2023-10-14 | 2024-04-26 | 邯郸市金泰包装材料有限公司 | Scratch-resistant corrosion-resistant tin-plated iron for can body and manufacturing method thereof |
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