CN103556049B - Connect and move back hard tinning substrate and production method thereof - Google Patents
Connect and move back hard tinning substrate and production method thereof Download PDFInfo
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Abstract
The invention provides and a kind of company move back hard tinning substrate, its chemical composition mass percent is: C0.07-0.09%, Si≤0.02%, Mn0.35-0.45%, P≤0.015%, S≤0.012%, Als0.04-0.06%, B0.0010-0.0020%, N≤0.0030%, all the other are Fe and impurity.The production method of hard tinning substrate is moved back by company provided by the invention, the temperature reheated in Hot Strip Rolling is 1200-1260 DEG C, roughing adopts 1+5 passage, workpiece thickness is 38-40mm, the finishing temperature of finish rolling is 850-890 DEG C, the temperature of batching is 610-690 DEG C, hot-rolled finished product thickness 2.5-3.0mm.Hard tinning substrate and production method thereof are moved back by company provided by the invention, by adopting carbon manganese strengthened, being aided with the design of low nitrogen high alumina height boron component and coordinating suitable cold and hot roll process can produce low timeliness, great surface quality, be suitable for the tinning substrate of zinc-plated rear tank processed.
Description
Technical field
The present invention relates to steelmaking technical field, particularly one even moves back hard tinning substrate and production method thereof.
Background technology
Tin plate be by the operation of continuous electroplating tin obtain the cold-rolled low carbon steel steel plate in two sides plating tin layers or steel band.It has corrosion-resistant, nontoxic, high strength, the feature that processability is good, is widely used in food, the field of product packaging such as beverage, chemical industry.
Along with the fast development of food packaging industry, the demand of zinc-plated industry to high quality tinning substrate also increases rapidly.Current tinning substrate is generally carbon aluminium-killed steel, is generally produced by continuous annealing (CA) and bell-type annealing (BA) two kinds of production technique.The usual hardness of coil of strip that bell-type annealing (BA) production technique is produced is soft, and surface quality is poor, and the tinning substrate therefore for more than hardness T-3 adopts continuous annealing (CA) production technique to produce mostly.But the annealing time of continuous annealing (CA) production technique is short, nitrogen in steel element is difficult to separate out completely, therefore there is obvious aging phenomenon, the tinning substrate produced places rear hardness HR30Tm for a long time often increases by 1 ~ 3 unit, causes occurring distortion, problems of crack in the tank user production process of downstream.
Summary of the invention
The object of this invention is to provide and a kind of company move back hard tinning substrate and production method thereof, by adopting carbon manganese strengthened, be aided with the design of low nitrogen high alumina height boron component, coordinate suitable cold and hot roll process, produce low timeliness, great surface quality, be suitable for the tinning substrate of zinc-plated rear tank processed.
For solving the problems of the technologies described above, the invention provides and a kind of company move back hard tinning substrate, its chemical composition mass percent is respectively: C0.07 ~ 0.09%, Si≤0.02%, Mn0.35 ~ 0.45%, P≤0.015%, S≤0.012%, Als0.04 ~ 0.06%, B0.0010 ~ 0.0020%, N≤0.0030%, all the other are Fe and impurity.
Present invention also offers the production method that hard tinning substrate moves back in a kind of company, by chemical composition mass percent be: C0.07 ~ 0.09%, Si≤0.02%, Mn0.35 ~ 0.45%, P≤0.015%, S≤0.012%, Als0.04 ~ 0.06%, B0.0010 ~ 0.0020%, N≤0.0030%, all the other are the molten steel of Fe and impurity, successively through strand, process furnace heats, thick dephosphorization, constant width machine fixed width, the roughing of R1 roughing mill, the roughing of R2 roughing mill obtains intermediate blank, then successively smart dephosphorization is carried out to intermediate blank, finish rolling, section cooling, batch and obtain hot-rolled finished product volume, finally successively pickling is carried out to hot-rolled finished product volume, cold continuous rolling, degreasing, connect and move back, smooth, cold rolling finished product volume is obtained after inspection.In Hot Strip Rolling, reheat temperature is 1200 ~ 1260 DEG C, and roughing adopts 1+5 passage, and workpiece thickness is 38 ~ 40mm, and the finishing temperature of finish rolling is 850 ~ 890 DEG C, and coiling temperature is 610 ~ 690 DEG C, and the thickness of hot-rolled finished product is 2.5 ~ 3.0mm.In cold rolled annealed process, connect that to move back annealing temperature be 630 ~ 680 DEG C, skin pass rolling power is 110 ~ 130t, and cold rolling finished product thickness is 0.30 ~ 0.35mm.
Hard tinning substrate and production method thereof are moved back by company provided by the invention, by the carbon in steel and manganese element content are optimized combination, thickness 0.30 ~ 035mm can be produced, hardness is the hard tinned plate of T-3 and T-4, owing to adopting the Composition Design of low nitrogen high alumina height boron, nitrogen in steel element by excessive aluminium and boron fully fixing, form aluminium nitride and boron nitride, the free nitrogen content in steel is made to be reduced to minimum level, coil of strip is made to reach the appearance not having large yield extension in the storage process of several months before tank processed, significantly improve ageing resistance performance, avoid the appearance of tank process processed distortion and cracking.Simultaneously low silicone content ensure that good surface quality.
Embodiment
The one that the embodiment of the present invention provides provides moves back hard tinning substrate a kind of company, its chemical composition mass percent is respectively: C0.07 ~ 0.09%, Si≤0.02%, Mn0.35 ~ 0.45%, P≤0.015%, S≤0.012%, Als0.04 ~ 0.06%, B0.0010 ~ 0.0020%, N≤0.0030%, all the other are Fe and impurity.The production method that hard tinning substrate moves back in described company is: by chemical composition mass percent be: C0.07 ~ 0.09%, Si≤0.02%, Mn0.35 ~ 0.45%, P≤0.015%, S≤0.012%, Als0.04 ~ 0.06%, B0.0010 ~ 0.0020%, N≤0.0030%, all the other are the molten steel of Fe and impurity, successively through strand, process furnace heats, thick dephosphorization, constant width machine fixed width, the roughing of R1 roughing mill, the roughing of R2 roughing mill obtains intermediate blank, then successively smart dephosphorization is carried out to intermediate blank, finish rolling, section cooling, batch and obtain hot-rolled finished product volume, finally successively pickling is carried out to hot-rolled finished product volume, cold continuous rolling, degreasing, connect and move back, smooth, cold rolling finished product volume is obtained after inspection.Wherein, the temperature reheated in Hot Strip Rolling is 1200 ~ 1260 DEG C, and roughing adopts 1+5 passage, and workpiece thickness is 38 ~ 40mm, and the finishing temperature of finish rolling is 850 ~ 890 DEG C, and the temperature of batching is 610 ~ 690 DEG C, hot-rolled finished product thickness 2.5 ~ 3.0mm.Connect in cold rolled annealed process that to move back annealing temperature be 630 ~ 680 DEG C, skin pass rolling power is 110 ~ 130t, and cold rolling finished product thickness is 0.30 ~ 0.35mm.The chemical composition mass percent that hard tinning substrate moves back in the company obtained is: C0.07 ~ 0.09%, Si≤0.02%, Mn0.35 ~ 0.45%, P≤0.015%, S≤0.012%, Als0.04 ~ 0.06%, B0.0010 ~ 0.0020%, N≤0.0030%, all the other are Fe and impurity.
In order to understand the present invention in depth, according to specific embodiment, the present invention is described in detail below.
Embodiment 1
Adopt conventional continuous cast method to form chemical composition mass percent and be respectively C:0.07%, Si:0.005%, Mn:0.36%, P:0.010%, S:0.008%, Als:0.041%, B:0.0010%, N:0.0028%, all the other are the slab of Fe and impurity, and specification is thick × wide=230mm × 1000mm.Then, make slab through hot tandem: namely to pass through heating, roughing dephosphorization, roughing, crop end, finish rolling dephosphorization, finish rolling, section cooling successively, batch and carry out hot continuous rolling, wherein, process furnace Heating temperature is 1210 DEG C, roughing adopts 1+5 passage, and workpiece thickness is 38mm, and finishing train finishing temperature is 866 DEG C, coiling temperature is 680 DEG C, and hot rolling specification is thick × wide=2.75mm × 970mm.Like this, after roughing, finish rolling, section cooling, batch through reeling machine; Then, make hot rolled coil through coupled pickling and tandem mill and connect move back unit: namely successively through uncoiling, crop, pickling, trimming, cold continuous rolling, connect move back, smooth carry out cold rolled annealed, wherein, even moving back annealing temperature is 680 DEG C, skin pass rolling power is 115t, and cold rolling trimmed size is thick × wide=0.32mm × 950mm.Like this, through overpickling, cold rolling, annealing after, batch through reeling machine, finally obtain chemical composition mass percent and be respectively C:0.07%, Si:0.005%, Mn:0.36%, P:0.010%, S:0.008%, Als:0.041%, B:0.0010%, N:0.0028%, all the other are the T-3 hardness rank tinning substrate of Fe and impurity, and its hardness HR30Tm is 58.0.After 200 DEG C of artificial aging 20min, hardness HR30Tm is 59.0, and variable quantity is 1 unit only, and yield extension is 2%.
Embodiment 2
Adopt conventional continuous cast method to form chemical composition mass percent and be respectively C:0.09%, Si:0.01%, Mn:0.42%, P:0.008%, S:0.006%, Als:0.053%, B:0.0015%, N:0.0020%, all the other are the slab of Fe and impurity, and specification is thick × wide=230mm × 1000mm.Then, make slab through hot tandem: namely to pass through heating, roughing dephosphorization, roughing, crop end, finish rolling dephosphorization, finish rolling, section cooling successively, batch and carry out hot continuous rolling, wherein, process furnace Heating temperature is 1250 DEG C, roughing adopts 1+5 passage, and workpiece thickness is 40mm, and finishing train finishing temperature is 880 DEG C, coiling temperature is 618 DEG C, and hot rolling specification is thick × wide=3.0mm × 853mm.Like this, after roughing, finish rolling, section cooling, batch through reeling machine; Then, make hot rolled coil through coupled pickling and tandem mill and connect move back unit: namely successively through uncoiling, crop, pickling, trimming, cold continuous rolling, connect move back, smooth carry out cold rolled annealed, wherein, even moving back annealing temperature is 630 DEG C, skin pass rolling power is 123t, and cold rolling trimmed size is thick × wide=0.35mm × 833mm.Like this, through overpickling, cold rolling, annealing after, batch through reeling machine, finally obtain chemical composition mass percent and be respectively C:0.09%, Si:0.01%, Mn:0.42%, P:0.008%, S:0.006%, Als:0.053%, B:0.0015%, N:0.0020%, all the other are the T-4 hardness rank tinning substrate of Fe and impurity, and its hardness HR30Tm is 62.0.After 200 DEG C of artificial aging 20min, hardness HR30Tm is 62.5, and variable quantity is 0.5 unit only, and yield extension is 0.5%.
Embodiment 3
Adopt conventional continuous cast method to form chemical composition mass percent and be respectively C:0.08%, Si:0.02%, Mn:0.44%, P:0.009%, S:0.008%, Als:0.057%, B:0.0017%, N:0.0019%, all the other are the slab of Fe and impurity, and specification is thick × wide=230mm × 1000mm.Then, make slab through hot tandem: namely to pass through heating, roughing dephosphorization, roughing, crop end, finish rolling dephosphorization, finish rolling, section cooling successively, batch and carry out hot continuous rolling, wherein, process furnace Heating temperature is 1237 DEG C, roughing adopts 1+5 passage, and workpiece thickness is 39mm, and finishing train finishing temperature is 871 DEG C, coiling temperature is 630 DEG C, and hot rolling specification is thick × wide=2.8mm × 932mm.Like this, after roughing, finish rolling, section cooling, batch through reeling machine; Then, make hot rolled coil through coupled pickling and tandem mill and connect move back unit: namely successively through uncoiling, crop, pickling, trimming, cold continuous rolling, connect move back, smooth carry out cold rolled annealed, wherein, even moving back annealing temperature is 640 DEG C, skin pass rolling power is 128t, and cold rolling trimmed size is thick × wide=0.30mm × 912mm.Like this, through overpickling, cold rolling, annealing after, batch through reeling machine, finally obtain chemical composition mass percent and be respectively C:0.08%, Si:0.02%, Mn:0.44%, P:0.009%, S:0.008%, Als:0.057%, B:0.0017%, N:0.0019%, all the other are the T-4 hardness rank tinning substrate of Fe and impurity, and its hardness HR30Tm is 59.5.After 200 DEG C of artificial aging 20min, hardness HR30Tm is 61.0, and variable quantity is 1 unit only, and yield extension is 1.5%.
Hard tinning substrate and production method thereof are moved back by company provided by the invention, by the carbon in steel and manganese element content are optimized combination, can be used for producing the hardness T-3 of thickness 0.32mm and the hard tinned plate of T-4, owing to adopting the Composition Design of low nitrogen high alumina height boron, nitrogen in steel element by excessive aluminium and boron fully fixing, form aluminium nitride and boron nitride, can significantly improve ageing resistance performance, after timeliness, yield extension is no more than 3%.Simultaneously low silicone content can ensure good surface quality.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (1)
1. the production method of hard tinning substrate is moved back by a company, by chemical composition mass percent be: C0.07 ~ 0.09%, Si≤0.02%, Mn0.35 ~ 0.45%, P≤0.015%, S≤0.012%, Als0.04 ~ 0.06%, B0.0010 ~ 0.0020%, N≤0.0030%, all the other are the molten steel of Fe and impurity, successively through strand, process furnace heats, thick dephosphorization, constant width machine fixed width, the roughing of R1 roughing mill, the roughing of R2 roughing mill obtains intermediate blank, then carries out smart dephosphorization successively to intermediate blank, finish rolling, section cooling, batch and obtain hot-rolled finished product volume, finally successively pickling is carried out to hot-rolled finished product volume, cold continuous rolling, degreasing, connect and move back, smooth, cold rolling finished product volume is obtained after inspection, it is characterized in that: in Hot Strip Rolling, reheat temperature is 1200 ~ 1260 DEG C, roughing adopts 1+5 passage, workpiece thickness is 38 ~ 40mm, and the finishing temperature of finish rolling is 850 ~ 890 DEG C, and coiling temperature is 610 ~ 690 DEG C, the thickness of hot-rolled finished product is 2.5 ~ 3.0mm, the annealing temperature that described company moves back is 630 ~ 680 DEG C, and described smooth rolling load is 110 ~ 130t, and the thickness of described cold rolling finished product is 0.30 ~ 0.35mm.
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| CN105779752B (en) * | 2014-12-23 | 2017-12-19 | 上海梅山钢铁股份有限公司 | A kind of Thin Specs cold rolling lace rolls hard steel plate continuous annealing production method |
| CN108796381B (en) * | 2017-04-26 | 2020-08-25 | 宝山钢铁股份有限公司 | Steel plate with high axial bearing capacity and excellent formability for tank and manufacturing method thereof |
| CN108300948A (en) * | 2018-02-27 | 2018-07-20 | 首钢京唐钢铁联合有限责任公司 | A kind of MR T-5 CA steel grades tinning substrates and its manufacturing method |
| CN111438189B (en) * | 2020-04-09 | 2021-12-07 | 北京首钢股份有限公司 | Cold-rolled sheet and shape control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102174683A (en) * | 2011-01-30 | 2011-09-07 | 首钢总公司 | Method for producing cold-rolling low-carbon aluminum killed steel with uniform through plate mechanical property |
| CN102766800A (en) * | 2011-05-05 | 2012-11-07 | 上海梅山钢铁股份有限公司 | Steel for hard tinplate bottle caps and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174683A (en) * | 2011-01-30 | 2011-09-07 | 首钢总公司 | Method for producing cold-rolling low-carbon aluminum killed steel with uniform through plate mechanical property |
| CN102766800A (en) * | 2011-05-05 | 2012-11-07 | 上海梅山钢铁股份有限公司 | Steel for hard tinplate bottle caps and production method thereof |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
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