CN100473741C - Soft tin-plate and making process thereof - Google Patents
Soft tin-plate and making process thereof Download PDFInfo
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- CN100473741C CN100473741C CNB2005100272914A CN200510027291A CN100473741C CN 100473741 C CN100473741 C CN 100473741C CN B2005100272914 A CNB2005100272914 A CN B2005100272914A CN 200510027291 A CN200510027291 A CN 200510027291A CN 100473741 C CN100473741 C CN 100473741C
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The soft tin-plate consists of C not more than 0.006 wt%, Mn 0.10-0.20 wt%, Al 0.025-0.075 wt%, Si not more than 0.03 wt%, Ti 0.03-0.08 wt%, P not more than 0.015 wt%, S not more than 0.015 wt%, N not more than 0.003 wt%, and O not more than 0.004 wt%, except Fe and inevitable impurities. Its production process includes the following steps: smelting steel, continuous casting and rolling, hot rolling, acid pickling and rolling, continuous annealing, flattening and tin plating.
Description
Technical field
The present invention relates to soft tin-plate and manufacture method thereof, being particularly related to HR30T is that 49 ± 3 soft tin-plates (hereinafter referred to as T-1CA) and HR30T are 53 ± 3 soft tin-plate (hereinafter referred to as T-2CA) and manufacture method thereof, this soft tin-plate adopts the method production of titanium-IF steel continuous annealing, be mainly used in production hole enlargement gaily decorated basket bucket, the jar of cover that distortion is complicated and punching press distortion.
Background technology
According to the JIS G of Japanese Industrial Standards 3303, hardness (HR30T) scope of different temper rank tin plates is as shown in table 1.Wherein be soft tin-plate from T-1 to T-3, T-4 is a hard tinned plate to T-6.
The durometer level of the different temper rank of table 1 tin plate
| Rank | The HR30T durometer level |
| T-1 | 46～52 |
| T-2 | 50～56 |
| T-2.5 | 52～58 |
| T-3 | 54～60 |
| T-4 | 58～64 |
| T-5 | 62～68 |
| T-6 | 67～73 |
In the past, tin plate mainly used carbon aluminium-killed steel production.NKK Corp in 1996 disclosed patent on March 19, (No.JP8073943) adopt the soft tin-plate of carbon aluminium-killed steel production hardness (HR30T) smaller or equal to T-3 hardness (HR30T is 54～60).Its Chemical Composition scope is: 0.050≤C (%)≤0.085, preferably 0.060≤C (%)≤0.080,0.05≤Mn (%)≤0.60, S (%) :≤0.020, P (%) :≤0.020, Al (%)≤0.10, and the atom number of Al and N ratio is more than or equal to 15.The hot rolling reeling temperature is controlled at 550 ℃～620 ℃, and annealing temperature is controlled at more than 650 ℃, A
1Below the transition temperature, and be cooled to 350 ℃～450 ℃, 350 ℃～450 ℃ ageing treatment more than 30 seconds with the speed of cooling of 〉=30 ℃/s.
When adopting carbon aluminium-killed steel to produce tin plate, tangible timeliness can take place, its product hardness will increase after the timeliness, follow-up processing characteristics is variation then, under the condition of aximal deformation values such as deep-draw, big hole enlargement, aggressive bend, be easy to occur cracking, produce defectives such as slip line reticulate pattern or curved surface barring.Be easy to the fold barring when the inevitable timeliness problem of soft steel causes tin plate crooked in addition, slip line occur after punching press or the tensile deformation, be difficult to satisfy user's demand.And, adopt carbon aluminium-killed steel to be not suitable for producing very soft tin plate.
Along with the progress of IF steel production technology, abroad, developed country begins the IF steel that adds niobium (Nb) that adopts in enormous quantities for a long time and produces tin-plated product.Because IF steel inherent favorable forming property and ageing resistance performance, make the show strong market competitiveness of IF steel tin-plated product.
NKK Corp adopts following chemical ingredients scope to produce soft tin-plate: C in the flat No.JP7197192 of nineteen ninety-five disclosed open patent on August 1 :≤0.004%, Mn :≤0.6%, Al:0.03～0.10%, N≤0.004%, Nb:0.021～0.050%, and the atomic quantity of Nb and C is than greater than 1.0.What this patent adopted is niobium-IF steel, and the content of Nb element has all been proposed clear and definite requirement.Because niobium-IF steel is to the processing parameter sensitivity, particularly, make the product performance instability to the hot-rolled process parameter sensitivity, and its recrystallization temperature height, required annealing temperature height, when the production of organizing this product, need to use more transition material and long transit time, particularly in continuous annealing furnace, be easy to generate the wooden dipper song even broken belt takes place, thereby logical plate poor performance, heat energy consumption simultaneously is big, adds that alloying elements nb costs an arm and a leg, so its production cost is higher relatively.In addition, niobium-IF steel plasticity is poor, though anisotropy is little, its overall mechanical property is poor than titanium-IF steel.At last, niobium has certain radioactivity when exploitation and smelting, and whether the tin plate (being mainly used in food service industry) that adds niobium is harmful yet disputable.
Simultaneously; although adopting, this patent disclosure explanation between 600 ℃～800 ℃, carries out hot rolling reeling; but this coiling temperature is higher, and particularly ceiling temperature is obviously too high, can't carry out actually operating; the coiling temperature scope that this patent is protected is obviously unreasonable; because when batching near 800 ℃, the steel plate oxidation is serious, even just obviously thickened at iron scale more than 630 ℃; this not only influences the pickling speed of back operation, and can influence the surface quality of the finished product.In addition; although annealing between 670 ℃～800 ℃ is adopted in this patent disclosure explanation; but because this patent employing is that niobium IF steel is produced soft tin-plate; in the given annealing region of this patent during near 670 ℃ during annealing (for example 670 ℃～740 ℃); steel plate is difficult under the normal unit speed and finishes recrystallize; promptly can not produce qualified soft tin-plate, therefore, the annealing region that this patent is protected is also obviously unreasonable.
Summary of the invention
The purpose of this invention is to provide T-1CA and T-2CA soft tin-plate that use titanium-IF steel continuous annealing is produced.
For achieving the above object, the invention provides T-1CA and T-2CA soft tin-plate, its substrate composition is (weight percent):
C≤0.006% is preferably C≤0.004%,
Mn：0.10～0.20％，
Al:0.025～0.075% is preferably Al:0.030～0.060%,
Si≤0.03％，
Ti:0.03～0.08% is preferably Ti:0.05～0.07%,
P≤0.015％，
S≤0.015％，
N≤0.003％，
O≤0.004％，
Surplus is Fe and some unavoidable impurities elements.
Below be the effect and the qualification explanation thereof of patent principal element of the present invention:
C：≤0.006％，
Along with the increase of C constituent content, the hardness of soft tin-plate increases on the one hand, and plasticity descends, for being stablized, hardness HR30T is controlled at below 56, and guarantee the processability of material, the present invention the C constituent content is limited to≤0.006%, to obtain suitable hardness and good processability; On the other hand, after C content increased, in order to ensure the ageing resistance performance of soft tin-plate, the addition of necessary corresponding increase Ti make production cost also increase, so C content should not be too high.Preferred C constituent content≤0.004%.
Mn：0.10～0.20％，
Mn is the main strengthening element of soft tin-plate, and its content high product hardness more is high more.But the Mn price is higher, in order to save cost, satisfying under the prerequisite of performance, consumption is few more economical more, when its content be controlled at 0.20% when following for the T-2CA soft tin-plate of the hardness of having relatively high expectations, can easily also very economically control and meet the demands by improving smooth unit elongation, but when its content is lower than 0.10%, material is soft partially on the one hand, just contains a certain amount of Mn originally in the steel on the one hand in addition.If require Mn to be lower than 0.10% then Mn falls in needs, cost is high on the contrary.Thereby the present invention is limited to its content between 0.10%～0.20%.
Ti：0.03～0.08％，
Ti is mainly used in the free C in the fixing steel, makes it form TiC, and Ti helps improving ageing resistance performance, especially its punching formation property of material simultaneously, and TiC also has certain dispersion-strengthened action simultaneously, can improve the intensity and the hardness of material.But Ti price more expensive (though than Nb considerably cheaper), its content how much be directly connected to manufacturing cost, so should strictly control its content, in the present invention, Ti content is controlled to be enough to below 0.08% meet the demands, but when its content is lower than 0.03%, can't free C in the steel and minor N is all fixing, therefore, the present invention requires the content of Ti between 0.03%～0.08%.Preferred Ti content is between 0.05%～0.07%.
Al：0.025～0.075％，
Al is calm element, also be strong nitride forming element, be mainly used to the fix N atom, favourable to the ageing resistance performance that improves material, indispensable reductor when Al also is steel-making simultaneously, its content can't satisfy specification of quality, and its content was higher than at 0.075% o'clock less than 0.025 o'clock, not only cost is higher, and can suppress growing up of annealing recrystallization crystal grain, therefore, the present invention is limited to its content between 0.025%～0.075%.Preferred Al content is limited between 0.030%～0.060%.
Si：≤0.03％，
Worsen solidity to corrosion though Si has certain strengthening effect, so low more good more, the present invention requires its content is controlled at below 0.03%, when its content surpasses 0.03%, obviously worsens corrosion resisting property.
Other element: P (P≤0.015%), S (S≤0.015%), N (N≤0.003%), O (O≤0.004%) are the detrimental impurity elements, should strictly control, and be low more good more, otherwise influence the mechanical property and the solidity to corrosion of soft tin-plate.These impurity elements as long as in limited range of the present invention, all can be produced the soft tin-plate that meets the demands.
T-1CA of the present invention and T-2CA soft tin-plate adopt following operation production: associating → continuous annealing → smooth → zinc-plated is rolled in steel-making → continuous casting → hot rolling → acid, also can adopt steel-making → continuous casting → hot rolling → pickling → cold continuous rolling → continuous annealing → smooth → zinc-plated, or steel-making → continuous casting → hot rolling → pickling → repeatedly reversible is cold rolling → continuous annealing → smooth → tin plating technique production.
Below be the key point of master operation:
Steel-making: molten steel is handled through RH refining vacuum outgas, and adopts the measure of control corresponding inclusion, produces continuously cast bloom through conventional continuous casting process at last, carries out hot rolling then.
Hot rolling: method of the present invention at hot-rolled process slab heating temperature (being tapping temperature) is: 1220 ± 30 ℃, hot rolling finishing temperature is 900 ± 20 ℃.When theoretical and production practice have all proved finishing temperature greater than 920 ℃, the belt steel surface oxidation is serious, and product surface quality is poor, but when finishing temperature is lower than 880 ℃, hot rolled strip enters the rolling mixed grain structure that is prone to of two-phase region, and causes the inequality of the finished product structure property.And hot rolling finishing temperature makes the belt steel surface oxidation lighter when being controlled at 900 ± 20 ℃, mixed grain structure also do not occur in the band steel, and the finished product structure property is even.Preferred hot rolling finishing temperature is controlled between 885 ℃～915 ℃, to obtain more uniform performance and better surface quality.
Hot rolling reeling temperature of the present invention is controlled between 590 ± 40 ℃.Improve the hardness that coiling temperature can reduce hot-rolled substrate, and then reduce the hardness of the finished product, improve the forming property of the finished product, but when coiling temperature during greater than 630 ℃, the belt steel surface iron scale thickens easily, the pickling difficulty, and influence product surface quality.When coiling temperature was lower than 550 ℃, hot rolling intermediates crystal grain was too small, and had influence on finished product tissue and performance, made the crystal grain of final finished tiny, and intensity and hardness increase, the plasticity variation.So use the T-1CA soft tin-plate and the T-2CA soft tin-plate of continuous annealing production for the present invention, when the hot rolling reeling temperature is controlled at 590 ± 40 ℃, it is less to batch back belt steel surface iron scale amount, and pickling is more or less freely, and the surface quality of the finished product is good.Preferred hot rolling reeling temperature is controlled between 570 ℃～610 ℃, to obtain good plasticity and the surface quality of Geng Jia.
Pickling and cold rolling: can adopt acid to roll the production of associating unit, perhaps first pickling, after carry out cold continuous rolling or repeatedly reversible cold rolling, but preferably adopt acid to roll the production of associating unit, to enhance productivity.Should adjust unit speed according to the pickling ability of unit during pickling, guarantee pickling effect.Cold rolling when being five frame tandem rollings, cold rolling total draft is 82%～92%.Cold rolling reduction will influence the mechanical property of material, and suitable cold rolling reduction is convenient to roll the assurance of hard material dimensional precision and the control of plate shape.The too little then forming materials of deflection is poor, and it is poor that the too greatly then cold rolling production of deflection consumes increase and rolls hardwood board shape, influences the stable logical plate of high speed that operation is moved back by follow-up company.
Continuous annealing: the present invention uses continuous annealing to produce T-1CA soft tin-plate and T-2CA soft tin-plate, and annealing temperature is 720 ℃～770 ℃, and soaking time is 25s～50s.Preferred annealing temperature is 735 ℃～765 ℃.Though adopt bell-type annealing also can produce soft tin-plate, the big volume head of the tin-plated product of bell-type annealing explained hereafter, in, the mechanical property of tail is inhomogeneous, its product plate shape and surface quality can not show a candle to the soft tin-plate that continuous annealing is produced.The present invention adopts titanium-IF steel continuous annealing to produce T-1CA soft tin-plate and T-2CA soft tin-plate, and its product mechanical property is even, and product surface quality is good, can satisfy customer requirements preferably, thereby has the stronger market competitiveness.When annealing temperature was higher than 770 ℃, because band steel matter is soft, when being with steel broad and thickness thin again, the band steel was easy to take place wooden dipper song even broken belt in annealing furnace, and energy expenditure also will increase simultaneously; When annealing temperature is lower than 720 ℃, be difficult to guarantee that steel plate finishes recrystallize under normal continuous annealing unit speed, product hardness increases, simultaneously the formed product degradation.The present invention uses titanium-IF steel continuous annealing to produce soft tin-plate, lower than the annealing temperature of using niobium-IF steel continuous annealing production soft tin-plate (according to the simulated annealing test-results, the annealing temperature of niobium-IF steel should reach 750 ℃～800 ℃ just can guarantee abundant recrystallize), therefore when production program layout, can reduce the consumption of transition volume and the time of heating-cooling, enhance productivity, reduce production costs, and because the reduction of temperature has reduced the probability of being with steel that wooden dipper song and broken belt take place significantly in annealing furnace.Soaking time and annealing temperature are interactional, improve annealing temperature and be convenient to shorten soaking time, but soaking time can not be less than 25s, otherwise that recrystal grain is grown up is insufficient, and material is hard partially, the easy sideslip of band steel when the unit production rate is too high simultaneously.Soaking time again can not be oversize, and when soaking time surpassed 50s, unit speed was too low owing to even moving back, and-aspect production efficiency reduces, and crystal grain looks too big on the other hand, and material is soft partially and be with steel to be easy to wooden dipper song even broken belt in annealing furnace.
Smooth: the smooth deflection after Ti-IF steel recrystallize is finished is very big to the material capability influence, and along with the increase of deflection, intensity and hardness obviously increase.The T-1CA soft tin-plate that the present invention uses continuous annealing to produce, the annealing back adopts the two-shipper frame smooth, smooth elongation control is between 0.8%～1.8%, and for the T-2CA soft tin-plate, its smooth elongation control is between 1.8%～3.0%, the smooth unit elongation scope of above-mentioned T-1CA and T-2CA can remake suitable adjustment according to the thickness of product, and the band steel adopts less smooth unit elongation when thin, adopt bigger smooth unit elongation when the band steel is thicker.
Zinc-plated: T-1CA soft tin-plate and T-2CA soft tin-plate that the present invention uses continuous annealing to produce, adopt the tin plating technique identical with common tin plate to produce.
The present invention adopts titanium-IF steel to produce soft tin-plate, not only the timeliness problem can not take place in Chemical Composition scope of the present invention, and insensitive to hot-rolled process parameter.The soft tin-plate that the present invention adopts titanium-IF steel to produce is lower than the soft tin-plate recrystallization temperature of producing with niobium-IF steel, not only the stove heat energy consumption is low, the temperature transition time is short during ordinary production, the consumption that volume was rolled up or returned in transition also will reduce, therefore can reduce production costs, and band steel difficult wooden dipper song that takes place when the continuous annealing furnace annealing, logical plate performance is good, and the broken belt risk is little.The soft tin-plate that the present invention adopts titanium-IF steel to produce has more stable mechanical property than the soft tin-plate with niobium-IF steel production.In addition, soft tin-plate of the present invention is guaranteeing that lower finishing temperature and coiling temperature are adopted in hot rolling under the uniform precondition of material capability, and the belt steel surface iron scale is few after the hot rolling, and pickling subsequently is easy to carry out, and the surface quality of the finished product is good.
Embodiment
It below is the example explanation that the present invention produces soft tin-plate.
Example 1-6:T-1CA soft tin-plate, adopt the production of titanium-IF steel, molten steel is handled through RH refining vacuum outgas, and adopted the measure of various control inclusion, produce continuously cast bloom through conventional continuous casting process at last, the chemical ingredients of molten steel is as shown in table 2, also contains other unavoidable impurities element in the steel, and surplus is Fe.
The substrate chemical ingredients actual achievement of table 2 example 1-6, wt%
| Numbering | C | Si | Mn | P | S | Al | N | Ti | O |
| 1 | 0.0022 | 0.007 | 0.17 | 0.011 | 0.0100 | 0.045 | 0.0026 | 0.060 | 0.0040 |
| 2 | 0.0020 | 0.008 | 0.18 | 0.015 | 0.0120 | 0.025 | 0.0023 | 0.050 | 0.0030 |
| 3 | 0.0033 | 0.030 | 0.20 | 0.012 | 0.0150 | 0.055 | 0.0018 | 0.030 | 0.0023 |
| 4 | 0.0040 | 0.015 | 0.13 | 0.009 | 0.0080 | 0.060 | 0.0027 | 0.055 | 0.0018 |
| 5 | 0.0045 | 0.009 | 0.10 | 0.013 | 0.0060 | 0.030 | 0.0030 | 0.080 | 0.0027 |
| 6 | 0.0060 | 0.008 | 0.12 | 0.010 | 0.0085 | 0.075 | 0.0026 | 0.070 | 0.0020 |
Continuously cast bloom is heated to the hot rolling cogging temperature before hot rolling, batch after roughing, finish rolling and laminar flow cooling, cools off after CDCM unit (pickling and cold continuous rolling associating unit) is produced cold-reduced sheet through 2～3 days room temperatures.Concrete processing parameter sees Table 3:
The main technologic parameters actual achievement of table 3 example 1-6
| Numbering | Tapping temperature (℃) | Hot rolling finishing temperature (℃) | The hot rolling reeling temperature (℃) | Cold rolling draft (%) |
| 1 | 1220 | 903 | 615 | 82 |
| 2 | 1250 | 920 | 630 | 90 |
| 3 | 1190 | 880 | 550 | 89 |
| 4 | 1225 | 907 | 590 | 85 |
| 5 | 1220 | 915 | 610 | 90 |
| 6 | 1210 | 885 | 570 | 92 |
With cold rolled strip anneal at CAPL unit (continuous annealing and levelling machine group), smooth, carry out conventional zinc-plated production tin plate then, the hardness of parameter and annealing, smooth unit elongation and the finished product is as shown in table 4.
The parameter and annealing of table 4 example 1-6, smooth unit elongation and product hardness actual achievement
| Numbering | Annealing temperature (℃) | Annealing soaking soaking time (s) | Smooth unit elongation (%) | Product hardness HR30T |
| 1 | 745 | 27 | 1.2 | 49.1 |
| 2 | 765 | 25 | 1.8 | 50.9 |
| 3 | 740 | 36 | 1.3 | 50.0 |
| 4 | 720 | 50 | 1.0 | 50.7 |
| 5 | 735 | 38 | 0.8 | 51.3 |
| 6 | 770 | 26 | 1.0 | 51.7 |
The mechanical property of the finished product is as shown in table 5.
The mechanical property actual achievement of table 5 example 1-6
| Numbering | Condition stress σ 0.2(MPa) | Tensile strength (MPa) | Uniform elongation (%) | Yield extension rate Y PEL(％) | Tension set (%) | Tin plate finished product hardness HR30T | Comprehensive surface quality |
| 1 | 245 | 349 | 25 | 0 | 41 | 49.1 | More excellent |
| 2 | 233 | 351 | 25 | 0 | 41 | 50.9 | Excellent |
| 3 | 247 | 353 | 24 | 0 | 40 | 50.0 | More excellent |
| 4 | 240 | 356 | 24 | 0 | 40 | 50.7 | Excellent |
| 5 | 249 | 356 | 24 | 0 | 40 | 51.3 | Excellent |
| 6 | 251 | 359 | 23 | 0 | 39 | 51.7 | Excellent |
Example 7-12:T-2CA soft tin-plate, adopt the production of titanium-IF steel, molten steel is handled through RH refining vacuum outgas, and adopted the measure of various control inclusion, produce continuously cast bloom through conventional continuous casting process at last, the chemical ingredients of molten steel is as shown in table 6, also contains other unavoidable impurities element in the steel, and surplus is Fe.
The substrate chemical ingredients actual achievement of table 6 example 7-12, wt%
| Numbering | C | Si | Mn | P | S | Al | N | Ti | O |
| 7 | 0.0021 | 0.0075 | 0.17 | 0.010 | 0.015 | 0.045 | 0.0030 | 0.070 | 0.0025 |
| 8 | 0.0019 | 0.0080 | 0.18 | 0.015 | 0.011 | 0.040 | 0.0022 | 0.055 | 0.0040 |
| 9 | 0.0015 | 0.0300 | 0.20 | 0.013 | 0.009 | 0.025 | 0.0023 | 0.030 | 0.0023 |
| 10 | 0.0060 | 0.0070 | 0.10 | 0.012 | 0.007 | 0.075 | 0.0025 | 0.080 | 0.0018 |
| 11 | 0.0040 | 0.0090 | 0.13 | 0.010 | 0.012 | 0.060 | 0.0018 | 0.040 | 0.0020 |
| 12 | 0.0035 | 0.0150 | 0.15 | 0.013 | 0.008 | 0.030 | 0.0020 | 0.050 | 0.0027 |
Continuously cast bloom is heated to the hot rolling cogging temperature before hot rolling, batch after roughing, finish rolling and laminar flow cooling, cools off after CDCM unit (pickling and cold continuous rolling associating unit) is produced cold-reduced sheet through 2～3 days room temperatures.Concrete processing parameter sees Table 7:
The main technologic parameters actual achievement of table 7 example 7-12
| Numbering | Tapping temperature (℃) | Hot rolling finishing temperature (℃) | The hot rolling reeling temperature (℃) | Cold rolling draft (%) |
| 7 | 1225 | 907 | 615 | 89 |
| 8 | 1210 | 890 | 600 | 82 |
| 9 | 1190 | 880 | 550 | 87 |
| 10 | 1250 | 920 | 630 | 90 |
| 11 | 1200 | 885 | 570 | 89 |
| 12 | 1220 | 915 | 610 | 92 |
With cold rolled strip anneal at CAPL unit (continuous annealing and levelling machine group), smooth, carry out conventional zinc-plated production tin plate then, parameter and annealing, smooth unit elongation and product hardness are as shown in table 8.
The parameter and annealing of table 8 example 7-12, smooth unit elongation and product hardness actual achievement
| Numbering | Annealing temperature (℃) | Annealing soaking soaking time (s) | Smooth unit elongation (%) | Uncoated tinplate base hardness HR30T |
| 7 | 750 | 28 | 2.6 | 53.0 |
| 8 | 740 | 33 | 2.4 | 52.8 |
| 9 | 770 | 25 | 2.8 | 53.6 |
| 10 | 720 | 50 | 1.8 | 54.5 |
| 11 | 735 | 40 | 2.3 | 54.6 |
| 12 | 765 | 26 | 3.0 | 55.1 |
The mechanical property of the finished product is as shown in table 9.
The mechanical property actual achievement of table 9 example 7-12
| Numbering | Condition stress σ 0.2(MPa) | Tensile strength (MPa) | Uniform elongation (%) | Yield extension rate Y PEL(％) | Tension set (%) | Tin plate finished product hardness HRT30T | Comprehensive surface quality |
| 7 | 275 | 363 | 22 | 0 | 38 | 53.1 | More excellent |
| 8 | 261 | 359 | 23 | 0 | 39 | 52.8 | More excellent |
| 9 | 270 | 357 | 23 | 0 | 39 | 53.6 | Excellent |
| 10 | 278 | 367 | 21 | 0 | 37 | 54.6 | Excellent |
| 11 | 273 | 359 | 22 | 0 | 38 | 54.6 | Excellent |
| 12 | 279 | 368 | 21 | 0 | 37 | 55.1 | Excellent |
Claims (17)
1. soft tin-plate, its substrate composition is (weight percent):
C≤0.006％，
Mn：0.10～0.20％，
Al：0.025～0.075％，
Si≤0.03％，
Ti：0.04～0.08％，
P≤0.015％，
S≤0.015％，
N≤0.003％，
O≤0.004％，
Surplus is Fe and unavoidable impurities element.
2. tin plate according to claim 1 is characterized in that, C content is≤0.004%.
3. tin plate according to claim 1 is characterized in that, described Al content is 0.030%～0.060%.
4. tin plate according to claim 1 is characterized in that, described Ti content is 0.05%～0.07%.
5. tin plate according to claim 1 is characterized in that, produces described tin plate with the method for continuous annealing.
6. the manufacture method of soft tin-plate according to claim 1 comprises the steps: that steel-making → continuous casting → hot rolling → acid rolls associating → continuous annealing → smooth → zinc-plated.
7. method according to claim 6 is characterized in that, described acid is rolled the step of associating and finished by adopting pickling and cold continuous rolling associating unit.
8. method according to claim 6 is characterized in that, the step that associating is rolled in described acid is to replace by carrying out cold continuous rolling or repeatedly reversible cold rolling step after the first pickling.
9. according to any described method of claim 6-8, it is characterized in that in described hot-rolled step, the slab tapping temperature is controlled between 1190 ℃～1250 ℃, finishing temperature is controlled between 880 ℃～920 ℃; Coiling temperature is controlled between 550 ℃～630 ℃.
10. method according to claim 9 is characterized in that, in described hot-rolled step, finishing temperature is controlled between 885 ℃～915 ℃; Coiling temperature is controlled between 570 ℃～610 ℃.
11., it is characterized in that in described cold rolling step, cold rolling reduction is controlled between 82%～92% according to any described method of claim 6-8.
12., it is characterized in that in the step of described continuous annealing, annealing temperature is controlled between 720 ℃～770 ℃ according to any described method of claim 6-8, soaking time is controlled between 25s～50s.
13. method according to claim 12 is characterized in that, described annealing temperature is controlled between 735 ℃～765 ℃.
14., it is characterized in that described planarization step adopts single chassis or two-shipper frame to finish according to any described method of claim 6-8.
15., it is characterized in that in described planarization step, smooth unit elongation is 0.8%～3.0% according to any described method of claim 6-8.
16. method according to claim 15 is characterized in that, when production hardness HR30T was 49 ± 3 soft tin-plate, described smooth elongation control was between 0.8%～1.8%.
17. method according to claim 15 is characterized in that, when production hardness HR30T was 53 ± 3 soft tin-plate, described smooth elongation control was between 1.8%～3.0%.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100272914A CN100473741C (en) | 2005-06-29 | 2005-06-29 | Soft tin-plate and making process thereof |
| KR1020087002426A KR20080038141A (en) | 2005-06-29 | 2006-06-26 | Soft blackplate for tinning and production method for the same |
| PCT/CN2006/001460 WO2007000109A1 (en) | 2005-06-29 | 2006-06-26 | Soft blackplates for tinning and production method for the same |
| RU2008103194/02A RU2381293C2 (en) | 2005-06-29 | 2006-06-26 | Soft black sheet iron for tinning and method of its manufacturing |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100272914A CN100473741C (en) | 2005-06-29 | 2005-06-29 | Soft tin-plate and making process thereof |
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| CN1888114A CN1888114A (en) | 2007-01-03 |
| CN100473741C true CN100473741C (en) | 2009-04-01 |
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| CNB2005100272914A Active CN100473741C (en) | 2005-06-29 | 2005-06-29 | Soft tin-plate and making process thereof |
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| Country | Link |
|---|---|
| KR (1) | KR20080038141A (en) |
| CN (1) | CN100473741C (en) |
| RU (1) | RU2381293C2 (en) |
| WO (1) | WO2007000109A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506437A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Production method of hard ultra-low carbon steel |
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| DE102011117572A1 (en) * | 2011-01-26 | 2012-08-16 | Salzgitter Flachstahl Gmbh | High-strength multiphase steel with excellent forming properties |
| CN102653839B (en) * | 2011-03-04 | 2014-10-29 | 上海梅山钢铁股份有限公司 | Low-temperature continuous-annealing interstitial-free atom cold-rolled steel plate and production method thereof |
| 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 |
| JP2013060644A (en) * | 2011-09-14 | 2013-04-04 | Jfe Steel Corp | Thin steel sheet excellent in workability, plated thin steel sheet, and method for producing them |
| JP2013076132A (en) * | 2011-09-30 | 2013-04-25 | Jfe Steel Corp | High strength thin steel sheet having excellent bake hardenability and formability and method for manufacturing the same |
| JP5884161B2 (en) * | 2011-12-07 | 2016-03-15 | Ｊｆｅスチール株式会社 | Steel plate for cans and method for producing steel plate for cans |
| DE102012002079B4 (en) * | 2012-01-30 | 2015-05-13 | Salzgitter Flachstahl Gmbh | Process for producing a cold or hot rolled steel strip from a high strength multiphase steel |
| US9797058B2 (en) * | 2012-03-30 | 2017-10-24 | Tata Steel Ijmuiden Bv | Process for manufacturing a recovery annealed coated steel substrate for packaging applications and a packaging steel product produced thereby |
| CN102747283B (en) * | 2012-07-31 | 2014-07-23 | 首钢总公司 | Method for producing steel strip for copper-plated precision welded pipe |
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| CN108500066B (en) * | 2017-02-24 | 2020-06-16 | 上海梅山钢铁股份有限公司 | Coordinated control method for tail thickness difference cold and hot rolling process of T5 hard tin plate |
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| CN105506437A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Production method of hard ultra-low carbon steel |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080038141A (en) | 2008-05-02 |
| RU2008103194A (en) | 2009-08-10 |
| RU2381293C2 (en) | 2010-02-10 |
| CN1888114A (en) | 2007-01-03 |
| WO2007000109A1 (en) | 2007-01-04 |
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