CN101643828B - Production method of anti-aging tinning black plate - Google Patents
Production method of anti-aging tinning black plate Download PDFInfo
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- CN101643828B CN101643828B CN2009100637235A CN200910063723A CN101643828B CN 101643828 B CN101643828 B CN 101643828B CN 2009100637235 A CN2009100637235 A CN 2009100637235A CN 200910063723 A CN200910063723 A CN 200910063723A CN 101643828 B CN101643828 B CN 101643828B
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Abstract
The invention relates to a production method of an anti-aging tinning black plate with hardness HR30Tm of 55+/-4 and discloses a production method of an anti-aging tinning black plate. The method comprises the following steps: smelting: adopting KR desulfurization, smelting in a converter, RH vacuum treatment and continuous casting; hot rolling: carrying out the hot rolling of a continuous casting blank comprising the following chemical components in percentage by weight: C: 0.02-0.06, Si: smaller than or equal to 0.025, Mn: smaller than or equal to 0.50, P: smaller than or equal to 0.020, S: smaller than or equal to 0.030, Als: 0.005-0.040, Ti: 0.005-0.020, N: smaller than or equal to 0.005, the balance of Fe and inevitable impurities; and carrying out pickling, cold rolling, electrolytic degreasing, full-hydrogen bell furnace annealing and leveling of a tinning black plate with hardness HR30Tm of 51-59. The invention has the advantages of small production control difficulty and low cost and hardness value, is beneficial for users to use the anti-aging tinning black plate to manufacture deep drawing cans and can lids with complicated deformation, lessens the canning defects of cracks, crazing slip lines or corded bent surfaces, and the like and improves the canning yield rate and the canning qualified rate.
Description
Technical field
Present technique relates to the production method of uncoated tinplate base, especially belongs to produce the production method that a kind of hardness HR30Tm is the anti-aging tinning black plate in 55 ± 4.
Background technology
The annealing way of cold-rolling tinning original plate has two kinds, i.e. cover annealing (BA), continuous annealing (CA).
Annealed steel plate, still there are the free C of part, N atom, if annealed steel plate is at normal temperatures through placing for a long time, or carrying out the short period of time heating under the high-temperature slightly, then can produce yield point elongation, and yield-point itself also can improve, and this performance variation along with institute's elapsed time and generation is called timeliness.The tin plate that has yield point elongation can produce wrinkle on its surface when drawing, influence quality product even cause workpiece to scrap attractive in appearance with product.Adopt continuous annealing annealed tin plate because annealing time is shorter, uncombined carbon, nitrogen amount are more, so ageing resistance is relatively poor.
At present, processing characteristics is good both at home and abroad, the hardness rank is as being TH52, TH55, the soft tin-plate of TH57, all adopt continuous annealing mode (CA), as Korean patent No. be: the patent documentation of KR100285643, its chemical ingredients that provides is C:0.003～0.007 for (wt.%), S≤0.012, N:0.001～0.004, Mn:0.10～0.40, Al:0.03～0.06, added Al in addition, elements such as N, " 2 sheet zip-top cans soft zinc-plated blackboard of aluminium killed steel and manufacture method " with excellent processability and compressive property, Korean patent No. is: the patent documentation of KR100340504, its chemical ingredients is that (wt.%) is C≤0.004, Mn:0.2～0.5, Al:0.02～0.06, P:0.02～0.04, Cr:0.02～0.06, N≤0.003, N, and S≤0.01, Ti:0.01～0.03, the zinc-plated blackboard of aluminium killed steel and the production method that have excellent processability and ductility after the annealing, 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, solAl:0.002～0.15, adopt continuous casting → 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 20sec, 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, and the chemical ingredients of employing IF steel is (wt%) C≤0.006, Mn:0.10～0.20, Al:0.025～0.075, Si≤0.03, Ti:0.03～0.08, P≤0.015, S≤0.015, N≤0.003, O≤0.004, surplus is Fe and unavoidable impurities element, adopt steel-making → continuous casting → hot rolling → acid to roll associating → continuous annealing → smooth → tin plating technique and produce the document of soft tin-plate and manufacture method thereof, its common ground adopts continuous annealing (CA) thermal regulation to produce soft tin-plate exactly, and the ageing resistance energy problem that does not all relate to tin plate in these patent documentations, have only Baosteel to propose employing continuous annealing R-OA, the control of gap-free atom processing and material grains size effectively slows down or eliminates the tin plate timeliness and takes place.
Produce the deficiency of soft tin-plate with continuous annealing furnace (CA): because uncoated tinplate base is extremely thin, IF steel or carbon aluminium-killed steel material are soft, add high temperature annealing, and problems such as hot wooden dipper song, broken belt take place when steel band continuous annealing easily.For fear of the generation of problems such as hot wooden dipper song, broken belt, people generally adopt the measure that reduces the unit production rate and for it, it causes production efficiency and lumber recovery to reduce again, the problem that production cost is high.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existence, it is the method for the anti-aging tinning black plate in 55 ± 4 that a kind of employing cover annealing method production hardness HR30Tm is provided.
Realize purpose technical measures of the present invention:
A kind of production method of anti-aging tinning black plate, its step:
1) smelts: adopt KR desulfurization → converter smelting → RH vacuum-treat → continuous casting;
2) hot rolling: with chemical ingredients (wt%) is C:0.02～0.06, Si :≤0.025, Mn :≤0.50, P :≤0.020, S :≤0.030, Als:0.005～0.040, Ti:0.005～0.020, N :≤0.005, and all the other continuously cast blooms for Fe and unavoidable impurities carry out hot rolling;
3) carry out pickling → cold rolling → electrolytic degreasing → perhydro cover annealing, the annealing temperature of perhydro cover annealing≤620 ℃, annealing time is that 11～16 hours → smooth → hardness HR30Tm is the uncoated tinplate bases in 55 ± 4.
The present invention adopts the cover annealing method to produce uncoated tinplate base, steel plate is after cold rolling and become the band steel of fibrous tissue, dislocation desity sharply raises, the also corresponding rapid increase of its intensity and hardness, for making the band steel recover plasticity, reduce hardness, obtain stable tissue and performance, therefore, the coil of strip after cold rolling adopts the perhydro bell furnace to carry out recrystallization annealing.Full-hydrogen hood-type annealing furnace does not have the local superheating phenomenon because furnace temperature is more even during heating, annealing time is longer, N, C generate stable compound and separate out, free C, N atom are less, so the band coil of strip mechanical property of full-hydrogen hood-type annealing furnace after handling is even, and anti-timeliness is good.In addition, because that small hydrogen atom penetrates in band coil of strip ring layer is very fast, in the time of 100 ℃, it makes, and residual lubricant is reduced to hydrocarbon polymer on the band coil of strip, thereby reduce its boiling point, accelerated the evaporation of hydrocarbon polymer, the decomposition of unlikely generation lubricant and remain in the band coil of strip the surface on.In the time of 600 ℃, intensive reductibility hydrogen (in low-dew point hydrogen atmosphere) can form water vapor with the residual oxide reduction effectively, and this water vapor reacts with being with carbon residual on the coil of strip, forms carbon monoxide, discharges out of the furnace with hydrogen.Therefore the perhydro bell-type annealing is handled the solidity to corrosion that also helps improving uncoated tinplate base.
C content: well-known, carbon is the most effective strengthening element, and therefore, along with the increase carbon steel hardening gradually of carbon content, but its cold working (punching press, drawing) simultaneously and welding property degenerate; Because cementite is a negative electrode with respect to carbon steel (matrix is a ferrite), therefore, when carbon content increases, negative electrode quantity and area have been increased, correspondingly its corrosion current has increased, thereby causes pickling time lag (PL) to increase, for this reason, determine that the soft uncoated tinplate base of anti-timeliness selects carbon aluminium-killed steel for use, carbon content is controlled to be 0.02～0.06%.
Si of the present invention: the content of uncoated tinplate base Si is high more, then the SiO of the oxidized generation of silicon
2Content increases thereupon, the SiO of surface of steel plate
2Content is high more, and then the adhesivity of coating is poor more.Therefore,, need Si content is carried out strict control for guaranteeing the solidity to corrosion and the ageing resistance of uncoated tinplate base, so Si content is controlled at≤0.025%.
Mn:Mn energy reinforced ferrite of the present invention, but also solid solution increases the hardness of tin plate base material.But the content of uncoated tinplate base Mn is high more, and the PL value is big more, and the solidity to corrosion of tin plate descends.Therefore, soft tin-plate Mn content≤0.50%.
P of the present invention: the most basic requirement of metallic substance is the homogeneity of performance and tissue, otherwise just easy to crack during punching press, formability also can go wrong.Because segregation takes place in phosphorus easily, so phosphorus content is wanted strict control.Therefore, P content≤0.020%.
S of the present invention: in general, S is the detrimental impurity element in steel, and the avidity of Ti and S is very strong, therefore, give full play to the effect of Ti, at first will stablize and reduce the S content in the steel.Therefore, S content≤0.030%.
Als content of the present invention is 0.005～0.040%.The adding of Al then can form sour molten aluminium and sour insoluble aluminium in the steel, and Als comprises solid solution aluminium and AlN, and the AlN particle of disperse can stop growing up of austenite crystal, crystal grain thinning, thus help to improve the processing forming of steel plate.But for aluminium killed steel, along with the increase of Als, the Al in the steel
2O
3The amount of inclusions increases, and the inclusion size also will become greatly, will cause the corrosion resisting property and the coating adhesion variation of tin plate, and the PL value is big more; But in order to guarantee the surface quality of complete deoxidation of molten steel and continuously cast bloom, Als should guarantee 〉=0.005%.Therefore Als content is chosen in 0.005～0.040%.
Ti content of the present invention is 0.005～0.020.Ti is typical microalloy element.Make in the process of the type jar that expands at D class steel tin plate, produce L (being slip line) through regular meeting, had a strong impact on the outward appearance of jar on the surface.For preventing that tin plate sheet surface from producing slip line, can add the Ti alloy of trace.At high temperature, Ti and N or O generate TiN or Ti
2O
3Micropartical, refine austenite crystal grain and as the forming core core of pro-eutectoid α-Fe.In addition, Ti combines the generation stable compound and the solute constituent element is withdrawn from sosoloid with N or C, suppressed the generation of " Ke Shi air mass " effectively.In cold-rolled low carbon steel, as contain Ti and measure when too much, big titanium nitride particle will be formed, cause steel to become fragile, thereby the tin plate pressworkability is degenerated, as it is very few to contain the Ti amount, it is difficult to play the effect of microalloying in steel, therefore, Ti add-on of the present invention should be controlled at 0.005～0.020%.
N content of the present invention≤0.005%.N is the same with C, also is solid solution element.Along with the increase of N content in the steel, will cause its pressworkability to degenerate (descending), simultaneously as n, r value, solid solution N is the major cause that causes tin plate finished product timeliness, particularly for the strain aging effect after smooth, the influence of nitrogen is especially big, therefore requires N low as far as possible.Concerning the soft tin plate of anti-the timeliness, the N content in the steel answers≤0.005%.
The present invention compared with prior art has following advantage:
1. the present invention adopts the bell-type annealing mode to produce, and it is little to have the production control difficulty, and cost is low, helps the advantage that the user reduces cost.
2. the hardness HR30Tm that produces of the present invention is the anti-aging tinning black plates in 55 ± 4, has the low advantage of hardness value, helps the user and uses the tin plate of anti-the timeliness to make deep Drawn Can and the complicated cover of distortion.
3. hardness HR30Tm of the present invention is that the anti-aging tinning black plate in 55 ± 4 has the strong advantage of ageing resistance, and defectives such as cracking, slip line reticulate pattern or curved surface barring improve system jar lumber recovery and make a jar qualification rate when making it can reduce the system jar.
Embodiment
Be described in further detail below:
Adopt carbon aluminium-killed steel to produce anti-aging tinning black plate.
Embodiment 1:
A kind of production method of anti-aging tinning black plate, its step:
1) smelts: adopt KR desulfurization → converter smelting → RH vacuum-treat → continuous casting;
2) hot rolling: its chemical ingredients (wt%) is C:0.042, Si:0.020, Mn:0.30, P:0.011, S:0.014, Als:0.029, N:0.0022, and all the other continuously cast blooms for Fe and unavoidable impurities carry out hot rolling;
3) carry out plug-type pickling; It is cold rolling to adopt the HC milling train to carry out, and its draft is controlled to be under 80% condition, has carried out the cold rolling of 3 passages, is rolled down to 0.28 millimeter thickness; Carry out electrolytic degreasing; Anneal in the perhydro bell furnace, its annealing temperature is 500～510 ℃, and annealing time is controlled to be 16 hours; Carry out smooth.
After testing, the hardness value of its anti-aging tinning black plate (HR30Tm) is 54.5, and pickling time lag (PL) is 2.0 seconds, and Erichsen number is 9.9mm.
Embodiment 2
A kind of production method of anti-aging tinning black plate, its step:
1) smelts: adopt KR desulfurization → converter smelting → RH vacuum-treat → continuous casting;
2) hot rolling: its chemical ingredients (wt%) is C:0.056, Si:0.012, Mn:0.31, P:0.012, S:0.019, Als:0.018, N:0.0035, and all the other continuously cast blooms for Fe and unavoidable impurities carry out hot rolling;
3) carry out plug-type pickling; It is cold rolling to adopt the HC milling train to carry out, and its draft is controlled to be under 86% condition, has carried out the cold rolling of 4 passages, is rolled down to 0.22 millimeter thickness; Carry out electrolytic degreasing; Anneal in the perhydro bell furnace, its annealing temperature is 550～560 ℃, and annealing time is controlled to be 13 hours; Carry out smooth.
After testing, the hardness value of its anti-aging tinning black plate (HR30Tm) is 55.0, and pickling time lag (PL) is 1.5 seconds, and Erichsen number is 9.5mm.
Embodiment 3:
A kind of production method of anti-aging tinning black plate, its step:
1) smelts: adopt KR desulfurization → converter smelting → RH vacuum-treat → continuous casting;
2) hot rolling: its chemical ingredients (wt%) is C:0.051, Si:0.013, Mn:0.29, P:0.010, S:0.020, Als:0.031, N:0.0025, and all the other continuously cast blooms for Fe and unavoidable impurities carry out hot rolling;
3) carry out plug-type pickling; It is cold rolling to adopt the HC milling train to carry out, and its draft is controlled to be under 91% condition, has carried out the cold rolling of 5 passages, is rolled down to 0.20 millimeter thickness; Carry out electrolytic degreasing; Anneal in the perhydro bell furnace, its annealing temperature is 605～620 ℃, and annealing time is controlled to be 11 hours; Carry out smooth.
After testing, the hardness value of its anti-aging tinning black plate (HR30Tm) is 57.5, and pickling time lag (PL) is 2.5 seconds, and Erichsen number is 9.2mm.
Claims (1)
1. the production method of an anti-aging tinning black plate, its step:
1) smelts: adopt KR desulfurization → converter smelting → RH vacuum-treat → continuous casting;
2) hot rolling: with chemical ingredients (wt%) is C:0.02～0.06, Si :≤0.025, Mn :≤0.50, P :≤0.020, S :≤0.030, Als:0.005～0.040, Ti:0.005～0.020, N :≤0.005, and all the other continuously cast blooms for Fe and unavoidable impurities carry out hot rolling;
3) carry out pickling → cold rolling → electrolytic degreasing → perhydro cover annealing, the annealing temperature of perhydro cover annealing≤620 ℃, annealing time is that 11～16 hours → smooth → hardness HR30Tm is the uncoated tinplate bases in 55 ± 4.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2792763A1 (en) * | 2011-12-12 | 2014-10-22 | JFE Steel Corporation | Steel sheet with excellent aging resistance, and method for producing same |
| CN108998723A (en) * | 2018-06-14 | 2018-12-14 | 河钢股份有限公司 | A kind of high temperature resistant accelerated ag(e)ing steel plate and its production method |
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| CN115449718B (en) * | 2022-08-19 | 2024-01-16 | 马鞍山钢铁股份有限公司 | Time-resistant pickled plate and production method thereof |
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| SU1624046A1 (en) * | 1989-03-13 | 1991-01-30 | Институт Металлургии Им.А.А.Байкова | Steel for manufacturing plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2792763A1 (en) * | 2011-12-12 | 2014-10-22 | JFE Steel Corporation | Steel sheet with excellent aging resistance, and method for producing same |
| EP2792763A4 (en) * | 2011-12-12 | 2014-11-19 | Jfe Steel Corp | Steel sheet with excellent aging resistance, and method for producing same |
| US9828648B2 (en) | 2011-12-12 | 2017-11-28 | Jfe Steel Corporation | Steel sheet with excellent aging resistance property and method for producing the same |
| CN108998723A (en) * | 2018-06-14 | 2018-12-14 | 河钢股份有限公司 | A kind of high temperature resistant accelerated ag(e)ing steel plate and its production method |
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