CN101906570A - Tinning substrate for deep-punching food can and production method thereof - Google Patents
Tinning substrate for deep-punching food can and production method thereof Download PDFInfo
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- CN101906570A CN101906570A CN 201010269576 CN201010269576A CN101906570A CN 101906570 A CN101906570 A CN 101906570A CN 201010269576 CN201010269576 CN 201010269576 CN 201010269576 A CN201010269576 A CN 201010269576A CN 101906570 A CN101906570 A CN 101906570A
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Abstract
The invention relates to a steel metallurgical material, in particular to a tinning substrate for deep-punching food cans and a production method thereof. The tinning substrate comprises the following chemical element compositions in percentage by weight: less than or equal to 0.04% of C; less than or equal to 0.02% of Si, 0.20-0.25% of Mn, less than or equal to 0.02% of P, less than or equal to 0.018% of S, 0.005-0.040% of Als, and the balance iron and unavoidable inclusion. The production method comprises the following processes: smelting, continuous casting, heating, hot rolling, cooling and reeling, pickling and cold rolling, and annealing and leveling, wherein the heating temperature is 1210 DEG C, the primary rolling temperature is 1100-1150 DEG C, the final rolling temperature is 890+/-10 DEG C, the reeling temperature is 560+/-15 DEG C, the annealing temperature is 670-690 DEG C, and others are performed as conventional processes. The invention has small production control difficulty, low cost, stable performance and high can manufacturing percent of pass, and is suitable for manufacturing deep-punching food cans and can covers with more complex transformation.
Description
Technical field
The invention belongs to field of ferrous metallurgy materials, be specifically related to a kind of tinning substrate for deep-punching food can and production method thereof.
Background technology
But tin plate belongs to the environmental protection type packing material of natural degradation, keepability, photophobism, soundness and distinctive metal finishing glamour in addition, and tin plate accounts for about 90% of ultimate production in the consumption of food cans and beverages can.But in recent years, because steel appreciate, the tin plate cost increases, in a lot of fields plastic packets the trend of alternative metals packing is housed, development of new deep-draw tinning substrate cheaply is the developing direction of used for packing foods steel from now on.
The tinning substrate quality of domestic enterprise's production at present is undesirable, chemical ingredients and unstable properties, fluctuation such as the thickness deviation of steel plate, planeness, coating uniformity coefficient, shear precision, surface smoothness, hardness is bigger, the food deep Drawn Can tinning substrate that special requirement are higher, and in using bell type annealing furnace production, the tinning substrate plate face of producing easily bonds, and is difficult to stably produce high-quality tin plate.
The purposes of thin specification tin plate is mainly on food system jar, so relate to the every aspect of food safety.Therefore, from single food system jar angle, very high to the uniformity requirement of the thickness of steel, performance; From making a jar angle in batches, very high to purity, the stability requirement of steel.Deep-draw is to require on the chemical ingredients than low-carbon (LC), nitrogen with the method for steel production routine, during hot rolling in the above temperature finish to gauge of Ar3 (austenite is to the temperature of ferritic transformation), adopt high temperature annealing to improve r value (plastic strain ratio) when zinc-plated, the yield strength that adopts less polishing unit elongation to reduce to cause because of work hardening during polishing improves, and n value (work hardening exponent) reduces.
At present, both at home and abroad to the tinning substrate of special purpose and cold rolling and annealing process is more to the research of tin plate performance, and less to tin plate hot rolling attitude tissue and performance to the research of tin plate performance.
Japanese Patent No. is: the JP58027933 patent documentation, the carbon aluminium-killed steel chemical ingredients (%) that it provides is C:0.02-0.09, N＜0.006, Als:0.002-0.15, adopt continuous casting and hot rolling-cold rolling-continuous annealing (CA) treatment process production, especially in annealing process, in the time of 680 ℃, be incubated tin plate and production method more than the 20S.The employing cold air power spraying and coating technology spraying plating tin or the tin alloy coat that also have domestic Baoshan Iron and Steel Company to provide form the bright and clean stanningmetal plate of surfacing through smooth or cold-rolling treatment then, handle the manufacture method that forms brilliant tin plate through soft heat again.Patent publication No. CN 101591755A discloses a kind of uncoated tinplate base for acidic food can and manufacture method thereof.This uncoated tinplate base for acidic food can Chemical Composition weight percent is: C:0.01～0.13; Si :≤0.20; Mn:0.30～0.50; P:0.010; S:0.010; Cu:0.080; Ni:0.080; Sn:0.020; Mo:0.020; Cr:0.080; Als:0.010～0.040; N:0.004; Surplus is Fe and little evitable impurity.Its manufacture method comprises the steps: desulfurizing iron after smelting and vacuum-treat are blown in converter again, carry out continuous casting, then strand is carried out hot rolling, pickling, cold rolling, successively through electrolytic cleaning, annealing, the smooth laggard electroplating tin of two-shipper, the tin plate corrosion resistance nature of this invention is better again.
Summary of the invention
The present invention is directed to the state of the art of present food cans with tinning substrate, by optimizing steel grade chemical ingredients proportioning, and adopt the ZSP sheet billet continuous casting to connect mutual aid system devised for poor peasants process flow, and adopt reversable mill five passage reversible rollings, adopt bell type annealing furnace perhydro bell-type annealing, and it is higher relatively to obtain a kind of C content, thin specification, deep-draw, zinc-plated good, punching press food cans quality is more stable, tinning substrate for deep-punching food can that the percentage of A-class goods is high and production method thereof.
The technical solution used in the present invention is:
A kind of tinning substrate for deep-punching food can, the weight percent of its chemical element moiety is: C :≤0.04%; Si :≤0.02%; Mn:0.20～0.25; P :≤0.02; S :≤0.018; Als:0.005～0.040%; All the other are iron and unavoidable impurities.
The production method of above-mentioned tinning substrate for deep-punching food can comprises steel-making step, hot-rolled step, cold rolling step, wherein:
A. make steel in the step:
Smelting procedure is: smelting → RH vacuum-treat is blown in KR desulfurization → converter again, the chemical composition of steel weight percent satisfies: C :≤0.04%, Si :≤0.02%, Mn:0.20～0.25, P :≤0.02, S :≤0.018, Als:0.005～0.040%, all the other are Fe and unavoidable impurities;
Continuous casting working procedure is: take omnidistance argon shield casting, molten steel overheat 30-35 ℃, pulling rate 1.3m/min adopts the plate shaped crystallizer of hydraulic vibration formula;
B. in the hot-rolled step:
Heating process is: strand advances 700 ℃ of furnace temperatures, 1210 ℃ of tapping temperatures, and strand is at stove residence time 150min;
Hot-rolled process is: enter Coil Box and batch after five passage roughing, seven frame hot continuous rollings after the dephosphorization, and adopt lubrication and rolling, 890 ± 10 ℃ of start rolling temperature 1100-1150 ℃, finishing temperature;
Cooling, coiling process is: the cold mode of layer adopts leading portion to cool off continuously, and rate of cooling 〉=23.0 ℃/s are as cold as 560 ± 15 ℃ soon, batch;
C. in the cold rolling step:
The pickling and cold-rolling operation is: enter pickling tank after the hot rolled coil uncoiling, pickling speed 100～120m/min enters the cold rolling reversable mill of single chassis then, and total draft is 75%; Batch after cold rolling;
Annealing, smooth operation are: cold rolling hard involves in into full-hydrogen hood-type annealing furnace, and 670～690 ℃ of annealing temperatures, soaking time are 13～15h, and smooth unit elongation 1.0～1.2% promptly gets the uncoated tinplate base that hardness is 51-53HV.
Compared with prior art, unusual effect of the present invention and technical characterstic are:
Tinning substrate for deep-punching food can chemical ingredients prescription provided by the invention, on the basis of strictness control carbon, silicon, sulphur, phosphorus content, rationally control the content of Als, the Als that makes in the steel to be deposited had both played the effect of refinement band crystalline grain of steel, can not make the cleanliness factor that the band hardness of steel increases, plasticity reduces and influence molten steel because Als content is high again.The detection index shows, can satisfy the related products requirement fully according to the present invention's super its mechanical performance index of deep-draw level low-carbon cold rolling steel of producing of filling a prescription.In addition; super deep-draw level low-carbon cold rolling steel method for making steel provided by the present invention; through the blowing of hot metal pretreatment, top and bottom combined blown converter, the hydrogen station deoxidation of tapping back, blow the process control of operations such as hydrogen refining, protection casting, vacuum secondary refining; can reach and reduce C content, raising molten steel cleanliness factor and slab quality; guarantee to be with steel mechanical property, and make the production process purpose of control easily.
The present invention adopts the higher short flow process slab continuous casting rolling technology of production efficiency, it is at casting process, heating cycle, there are evident difference in aspects such as the operation of rolling and traditional hot continuous rolling process, wherein the ZSP process characteristic is to adopt the direct heat charging, the intermediate blank hot rolling is got, seven frame tandem rollings, rolling lubrication and laminar flow cooling, batch by the intermediate blank Coil Box, can make the intermediate blank head and tail temperature even, it is too fast to prevent that temperature from descending, therefore, this Production Flow Chart can be adjusted rolling temperature and draft flexibly, obtain required tissue and performance, produce the calm steel of low-carbon (LC) aluminium of low-cost and high-performance.
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, cold-rolling tinning original plate of the present invention is selected soft steel for use, and its carbon content is≤0.04%, and limit control on the upper side can guarantee that cold rolling raw sheet has cold-forming property and certain rigidity preferably.
Si: the content of uncoated tinplate base Si is high more, and then the Si02 content of the oxidized generation of silicon increases thereupon, and the Si02 content of surface of steel plate is high more, and then the adhesivity of coating is poor more.The solidity to corrosion of tin plate descends with the rising of Si content, and food cans has certain requirement with tin plate plating corrosion resisting property.Therefore, for guaranteeing the solidity to corrosion and the ageing resistance of uncoated tinplate base, Si content is carried out strict control, Si content 0.020%.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 should be limit control on the lower side.
Segregation takes place in P easily, and the homogeneity of performance and tissue is had disadvantageous effect, 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, otherwise just easy to crack during punching press, formability also can go wrong.
S, in general, the content of sulphur is the smaller the better.The segregation of S tendency is big in the steel, and sulfide inclusion is bigger to the deep drawability influence of tin plate, and therefore, the control of S content should be low as much as possible.
Embodiment
Below in conjunction with embodiment in detail the present invention is described in detail.
In the present embodiment, ZSP produces line length 309.1m, pickling and cold-rolling line length 250m, finished product tinning substrate coiled material specification is (0.2～1.5) * (900～1300) * C, rolls up heavy about 16 tons, hardness is 53HV, the weight percent of chemical element moiety is: C:0.03%, Si:0.01%, Mn:0.24%, P:0.013%, S:0.009%, Als:0.028%.
Its production method is carried out as follows:
1, smelt: steel melting furnace employing capacity is 120 tons converter, and tap is 125 tons, 1655 ℃ of tapping temperatures.Steel melting furnace is produced the molten steel that comes and carry out refining in the RH refining furnace, adopt ordinary methods such as intensification, composition adjustment, calcium processing, molten steel composition weight percent after refining finishes is controlled to be: C:0.03%, Si:0.01%, Mn:0.24%, P:0.013%, S:0.009%, Als:0.028%; Liquid steel temperature is 1610 ℃ after the refining.
2, continuous casting: omnidistance argon shield casting, 35 ℃ of molten steel overheats adopt plate shaped crystallizer, and this crystallizer is a hydraulic vibration, and strand pulling rate 1.3m/min, slab thickness are 180mm.
3, heating: strand enters process furnace after cooling off through secondary cooling zone, and strand advances 700 ℃ of furnace temperatures, 1210 ℃ of tapping temperatures, strand residence time 150min.
4, roughing: after strand goes out process furnace, remove the reversible roughing mill roughing that scale on surface enters the band edger roll, enter Coil Box after roughing 5 passages and batch through the high-pressure water descaling machine.
5, finish rolling: after intermediate blank goes out the Coil Box dephosphorization, enter seven frame hot continuous rolling units, 1100 ℃ of start rolling temperatures, 900 ℃ of finishing temperatures, the F7 roll speed is 9m/s, and hot rolling thickness is 4mm, and draft is F1:12.7% relatively; F2-F3:41.8%; F4-F5:39.4%; F6-F7:17.8%.
6, cool off, batch: the cold mode of layer adopts leading portion to cool off continuously, rate of cooling: 〉=23.0 ℃/s; Coiling temperature is 560 ℃, batches the back naturally cooling.
7, pickling, cold rolling: enter pickling tank after the hot rolled coil uncoiling, pickling speed 120m/min enters the cold rolling reversable mill of single chassis then, and total draft is about 75%; Batch after cold rolling.
8, annealing, smooth: cold rolling hard involves in into bell type annealing furnace, and 680 ℃ of annealing temperatures, soaking time are 15h, smooth unit elongation 1.2%.
Claims (2)
1. a tinning substrate for deep-punching food can is characterized in that, the weight percent of chemical element moiety is: C :≤0.04%; Si :≤0.02%; Mn:0.20～0.25; P :≤0.02; S :≤0.018; Als:0.005～0.040%; All the other are iron and unavoidable impurities.
2. the production method of a tinning substrate for deep-punching food can as claimed in claim 1 comprises steel-making step, hot-rolled step, cold rolling step, it is characterized in that:
A. make steel in the step:
Smelting procedure is: smelting → RH vacuum-treat is blown in KR desulfurization → converter again, the chemical composition of steel weight percent satisfies: C :≤0.04%, Si :≤0.02%, Mn:0.20～0.25, P :≤0.02, S :≤0.018, Als:0.005～0.040%, all the other are Fe and unavoidable impurities;
Continuous casting working procedure is: take omnidistance argon shield casting, molten steel overheat 30-35 ℃, pulling rate 1.3m/min adopts the plate shaped crystallizer of hydraulic vibration formula;
B. in the hot-rolled step:
Heating process is: strand advances 700 ℃ of furnace temperatures, 1210 ℃ of tapping temperatures, and strand is at stove residence time 150min;
Hot-rolled process is: enter Coil Box and batch after five passage roughing, seven frame hot continuous rollings after the dephosphorization, and adopt lubrication and rolling, 890 ± 10 ℃ of start rolling temperature 1100-1150 ℃, finishing temperature;
Cooling, coiling process is: the cold mode of layer adopts leading portion to cool off continuously, and rate of cooling 〉=23.0 ℃/s are as cold as 560 ± 15 ℃ soon, batch;
C. in the cold rolling step:
The pickling and cold-rolling operation is: enter pickling tank after the hot rolled coil uncoiling, pickling speed 100～120m/min enters the cold rolling reversable mill of single chassis then, and total draft is 75%; Batch after cold rolling;
Annealing, smooth operation are: cold rolling hard involves in into full-hydrogen hood-type annealing furnace, and 670～690 ℃ of annealing temperatures, soaking time are 13～15h, and smooth unit elongation 1.0～1.2% promptly gets the uncoated tinplate base that hardness is 51-53HV.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103305680A (en) * | 2013-06-08 | 2013-09-18 | 首钢总公司 | Method for producing cold-rolled sheet by means of cover annealing blowing |
| CN103451519A (en) * | 2012-06-01 | 2013-12-18 | 上海梅山钢铁股份有限公司 | Cold rolling hot-dip steel with thickness greater than 1.5 mm for folding forming and production method thereof |
| CN104651712A (en) * | 2015-03-18 | 2015-05-27 | 唐山国丰钢铁有限公司 | CQ-grade hot-dip galvanization steel strip for anti-theft door plate and production process thereof |
| CN105018976A (en) * | 2014-04-21 | 2015-11-04 | 上海梅山钢铁股份有限公司 | Cold-rolled tin plate for tank used for containing protein food and manufacturing method of cold-rolled tin plate |
| CN105648331A (en) * | 2014-11-14 | 2016-06-08 | 上海梅山钢铁股份有限公司 | Cold-rolled flash-coating tinned steel plate for food can and manufacturing method thereof |
| CN107541663A (en) * | 2016-06-23 | 2018-01-05 | 上海梅山钢铁股份有限公司 | A kind of beverage can ferrostan and its production method |
| CN109957726A (en) * | 2019-03-29 | 2019-07-02 | 江苏省沙钢钢铁研究院有限公司 | A kind of low-cost high-strength cold rolled annealed plate and manufacturing method |
| CN112176166A (en) * | 2020-09-09 | 2021-01-05 | 唐山不锈钢有限责任公司 | Production method of high-yield-strength and high-elongation T-5 tinplate base plate |
| CN112746223A (en) * | 2020-12-30 | 2021-05-04 | 广西柳钢华创科技研发有限公司 | High-r-value low-carbon aluminum killed steel produced by ferrite rolling process |
| CN113943899A (en) * | 2021-10-20 | 2022-01-18 | 山东钢铁集团日照有限公司 | Control method for surface appearance of cold-rolled deep-drawing steel |
| CN114918622A (en) * | 2022-05-31 | 2022-08-19 | 江苏苏讯新材料科技股份有限公司 | Deep-drawing tank processing technology |
| CN115125434A (en) * | 2021-03-29 | 2022-09-30 | 宝山钢铁股份有限公司 | Low-carbon high-nitrogen tinned substrate and continuous slab casting production method thereof |
| CN115341155A (en) * | 2022-10-17 | 2022-11-15 | 江苏省沙钢钢铁研究院有限公司 | Tin plate and manufacturing method thereof |
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| 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 |
| CN103451519A (en) * | 2012-06-01 | 2013-12-18 | 上海梅山钢铁股份有限公司 | Cold rolling hot-dip steel with thickness greater than 1.5 mm for folding forming and production method thereof |
| CN103451519B (en) * | 2012-06-01 | 2016-04-13 | 上海梅山钢铁股份有限公司 | A kind of thickness is greater than cold rolling hot dipping steel plating and the production method thereof of 1.5mm bending and forming |
| CN103305680A (en) * | 2013-06-08 | 2013-09-18 | 首钢总公司 | Method for producing cold-rolled sheet by means of cover annealing blowing |
| CN105018976A (en) * | 2014-04-21 | 2015-11-04 | 上海梅山钢铁股份有限公司 | Cold-rolled tin plate for tank used for containing protein food and manufacturing method of cold-rolled tin plate |
| CN105648331A (en) * | 2014-11-14 | 2016-06-08 | 上海梅山钢铁股份有限公司 | Cold-rolled flash-coating tinned steel plate for food can and manufacturing method thereof |
| CN104651712A (en) * | 2015-03-18 | 2015-05-27 | 唐山国丰钢铁有限公司 | CQ-grade hot-dip galvanization steel strip for anti-theft door plate and production process thereof |
| CN107541663B (en) * | 2016-06-23 | 2019-11-19 | 上海梅山钢铁股份有限公司 | A kind of beverage can ferrostan and its production method |
| CN107541663A (en) * | 2016-06-23 | 2018-01-05 | 上海梅山钢铁股份有限公司 | A kind of beverage can ferrostan and its production method |
| CN109957726A (en) * | 2019-03-29 | 2019-07-02 | 江苏省沙钢钢铁研究院有限公司 | A kind of low-cost high-strength cold rolled annealed plate and manufacturing method |
| CN112176166A (en) * | 2020-09-09 | 2021-01-05 | 唐山不锈钢有限责任公司 | Production method of high-yield-strength and high-elongation T-5 tinplate base plate |
| CN112746223A (en) * | 2020-12-30 | 2021-05-04 | 广西柳钢华创科技研发有限公司 | High-r-value low-carbon aluminum killed steel produced by ferrite rolling process |
| CN112746223B (en) * | 2020-12-30 | 2022-02-01 | 广西柳钢华创科技研发有限公司 | High-r-value low-carbon aluminum killed steel produced by ferrite rolling process |
| CN115125434A (en) * | 2021-03-29 | 2022-09-30 | 宝山钢铁股份有限公司 | Low-carbon high-nitrogen tinned substrate and continuous slab casting production method thereof |
| CN113943899A (en) * | 2021-10-20 | 2022-01-18 | 山东钢铁集团日照有限公司 | Control method for surface appearance of cold-rolled deep-drawing steel |
| CN114918622A (en) * | 2022-05-31 | 2022-08-19 | 江苏苏讯新材料科技股份有限公司 | Deep-drawing tank processing technology |
| CN114918622B (en) * | 2022-05-31 | 2023-10-20 | 江苏苏讯新材料科技股份有限公司 | Deep-drawing tank processing technology |
| CN115341155A (en) * | 2022-10-17 | 2022-11-15 | 江苏省沙钢钢铁研究院有限公司 | Tin plate and manufacturing method thereof |
| CN115341155B (en) * | 2022-10-17 | 2023-02-24 | 江苏省沙钢钢铁研究院有限公司 | Tin plate and manufacturing method thereof |
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