CN102653839B - Low-temperature continuous-annealing interstitial-free atom cold-rolled steel plate and production method thereof - Google Patents

Low-temperature continuous-annealing interstitial-free atom cold-rolled steel plate and production method thereof Download PDF

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CN102653839B
CN102653839B CN201110052830.5A CN201110052830A CN102653839B CN 102653839 B CN102653839 B CN 102653839B CN 201110052830 A CN201110052830 A CN 201110052830A CN 102653839 B CN102653839 B CN 102653839B
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rolled steel
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CN102653839A (en
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裴新华
曹孝平
李雯
穆海玲
韩孝永
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Shanghai Meishan Iron and Steel Co Ltd
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Abstract

The invention relates to a low-temperature continuous-annealing interstitial-free atom cold-rolled steel plate and a production method thereof and belongs to the technical field of iron-based alloys. The production method of the cold-rolled steel plate comprises the following steps of: controlling the components of the cold-rolled steel plate in percentage by mass: 0.0005-0.0025% of C, less than or equal to 0.03% of Si, 0.05-0.15% of Mn, less than or equal to 0.015% of P, less than or equal to 0.01% of S, less than or equal to 0.0025% of O, less than or equal to 0.0025% of N, 0.015-0.050% of Al, 0.03-0.07% of Ti, and the balance of Fe and inevitable mixed elements; and meanwhile, controlling the continuous-annealing temperature of the cold-rolled steel plate to be 710-740 DEG C, and controlling the cold-rolling reduction ratio to be not less than 80%. According to the cold-rolled steel plate and the production method thereof, the reasonable chemical components and the suitable control of cold-rolling reduction are adopted, the recrystallization temperature is lowered, full-old-rolled microstructures are formed, and a lower continuous-annealing temperature can be adapted, so that the equipment cost and energy consumption are reduced, the control difficulty of a production process is reduced, the product defects and production accidents are avoided.

Description

Low temperature continuous annealing gap-free atom cold-rolled steel sheet and production method thereof
Technical field
The present invention relates to a kind of gap-free atom cold-rolled steel sheet, and relate to a kind of production method of this cold-rolled steel sheet, belong to ferrous alloy technical field.
Background technology
Gapless atomic steel is called again IF steel (abbreviation of Interstitial-Free Steel).Due to atom very close to each other, therefore there is excellent deep drawability and non-ageing, in industries such as automobile, household electrical appliances, five metals, obtain in a large number, applied widely.Particularly gap-free atom cold-rolled steel sheet, after anneal more than recrystallization temperature, can obtain good microcosmic texture after cold rolling, has more excellent stamping performance.There are two kinds of bell-type annealing technique and continuous annealing processes for the annealing way of gap-free atom cold-rolled steel sheet.Compare with bell-type annealing technique, continuous annealing has 1) mechanical property is even on band steel length and width; 2) belt steel flating degree is high, and plate shape is good; 3) annealing process is without bonding phenomenon, and strip surface quality is good.Therefore, continuous annealing process production gap-free atom cold-rolled steel sheet is widely used.
But according to the knowledge of the applicant, the recrystallization temperature of existing gap-free atom cold-rolled steel sheet in the time of continuous annealing is higher, therefore need higher continuous annealing temperature (general >=780 DEG C).In actual production, on the one hand, the continuous annealing furnace that need to be used for annealing has higher temperature capability like this, thereby increases construction, maintenance cost and the energy consumption of annealing furnace; On the other hand, because annealing temperature is high, the tension force with steel, difficulty smooth and steady running control are increased, and easily having formed the product defects such as muscle, rib typesetting and printing even causes the industrial accidents such as broken belt.
Summary of the invention
The technical problem that the present invention solves is: propose a kind of in the time of continuous annealing, have lower recrystallization temperature, the gap-free atom cold-rolled steel sheet with good stamping performance that can carry out at a lower temperature continuous annealing; Thereby reduce equipment cost and energy consumption, reduce controlling of production process difficulty, avoid product defects and industrial accident.
In order to solve the problems of the technologies described above, one of technical scheme that the present invention proposes is: a kind of low temperature continuous annealing gap-free atom cold-rolled steel sheet, and the temperature of described cold-rolled steel sheet in the time of continuous annealing is 710-740 DEG C; The composition that described cold-rolled steel sheet contains and mass percentage content are: C:0.0005~0.0025%, Si≤0.03%, Mn:0.05-0.2%, P≤0.015%, S≤0.01%, 0≤0.0025%, N≤0.0025%, Al:0.015~0.050%, Ti:0.03 ∽ 0.07%, all the other are Fe and inevitable tramp element; The ratio X of the mass percentage content of described Ti composition and C composition, N composition and S composition meets following formula,
X = Ti / ( 48 12 C + 48 14 N + 48 32 S ) .
In order to solve the problems of the technologies described above, two of the technical scheme that the present invention proposes is: a kind of production method of low temperature continuous annealing gap-free atom cold-rolled steel sheet, comprise steel making working procedure, hot-rolled process, cold rolling process and continuous annealing operation, it is characterized in that composition and the mass percentage content of in described steel making working procedure, controlling described cold-rolled steel sheet are: C:0.0005~0.0025%, Si≤0.03%, Mn:0.05-0.2%, P≤0.015%, S≤0.01%, 0≤0.0025%, N≤0.0025%, Al:0.015~0.050%, Ti:0.03 ∽ 0.07%, all the other are Fe and inevitable tramp element, in described hot-rolled process, the Heating temperature of controlling continuous casting steel billet is 1080~1160 DEG C, and in described continuous annealing operation, control temperature is 710-740 DEG C, in described cold rolling process, control draft >=80%.
The improvement of one of technique scheme is: the continuous casting steel billet Heating temperature of described cold-rolled steel sheet in the time of hot rolling is 1080~1160 DEG C, draft >=80% of described cold-rolled steel sheet when cold rolling.
The further improvement of one of technique scheme is: described ratio X is 1.5~2.0.
The further improvement of one of technique scheme is: the intermediate blank after the roughing of described cold-rolled steel sheet in the time of hot rolling after Coil Box rolling again uncoiling enter 7 passage finish rolling, the finish rolling start rolling temperature of described cold-rolled steel sheet in the time of hot rolling is 960 DEG C~1020 DEG C, the finish rolling end temp of described cold-rolled steel sheet in the time of hot rolling is 900 DEG C~950 DEG C, and after the finish rolling of described cold-rolled steel sheet in the time of hot rolling, coiling temperature is 600 DEG C~700 DEG C; The soaking zone time of described cold-rolled steel sheet in the time of continuous annealing is 60~160s.
Further improving again of one of technique scheme is: the smooth unit elongation of described cold-rolled steel sheet when smooth is 0.3~1.2%.
Two improvement of technique scheme is: in described hot-rolled process, control intermediate blank after roughing after Coil Box rolling again uncoiling enter 7 passage finish rolling, controlling finish rolling start rolling temperature is 960 DEG C~1020 DEG C, controlling finish rolling end temp is 900 DEG C~950 DEG C, and after control finish rolling, coiling temperature is 600 DEG C~700 DEG C; In described continuous annealing operation, the time of controlling soaking zone is 60~160s.
Two further improvement of technique scheme is: also comprise smooth operation after annealing; In described smooth operation, controlling smooth unit elongation is 0.3~1.2%.
Technique scheme perfect: the mass percentage content of described C composition is 0.008~0.0015%, and the mass percentage content of described Mn composition is 0.08~0.15%, and described draft is 85%~90%; Described finish rolling end temp is 920 DEG C, and after described finish rolling, coiling temperature is 680 DEG C, and described draft is 85%~90%.
The theoretical foundation of the chemical constitution in the invention described above technical scheme is:
[carbon]: reduce C content, be conducive to gap-free atom cold-rolled steel sheet and obtain good punching performance, can under lower annealing temperature, obtain low yield strength and high uniform elongation simultaneously.Because the punching performance of solid solution C grievous injury gapless atomic steel, along with the increase of C content, after recrystallization annealing, be conducive to { the 111} texture density reduction of punching press, on the other hand along with the increase of C content, can with add Ti atom to form more carbide, make under identical annealing temperature the strength increase of steel plate, therefore the low yield strength in order to obtain needing, need to increase annealing temperature.But too low C content is difficult to realize in industrial production, can obviously increase steel-making cost, it is 0.0005~0.0025% that technical solution of the present invention is set C content range, preferable range is 0.008~0.0015%.
[silicon]: in gap-free atom cold-rolled steel sheet, Si is inevitable impurity element, plasticity and the forming property of Si content grievous injury cold-rolled steel sheet.But to the too low cost that can improve steel-making refining procedure of Si content requirement.Technical solution of the present invention is set Si content≤0.03%.
[manganese]: Mn mainly exists with solid solution condition in gap-free atom cold-rolled steel sheet, improves armor plate strength, unfavorable to the formability index r value of deep drawing steel.Because Mn element has solution strengthening effect, if Mn content is high, can not, under lower annealing temperature, obtain lower yield strength.But too low Mn content can increase the hot short risk of steel plate.It is 0.05%~0.2% that technical solution of the present invention is set Mn content range, and preferable range is 0.08~0.15%.
[phosphorus]: P can improve the recrystallization temperature of gapless atomic steel, and the annealing temperature of steel requirement is raise, and therefore needs to control lower P content.Because P is easily at Grain Boundary Segregation, can increase the secondary processing brittleness phenomenon of gap-free atom cold-rolled steel sheet simultaneously.Technical solution of the present invention is set P content P≤0.015%.
[sulphur]: falling S can increase solid solution carbon amount, reduces grain growth resistance, the punching performance of raising product.S can also with gapless atomic steel in formation sulfide (TiS, Ti 4C2 S2) consumed Ti element useful in steel.Therefore gapless atomic steel needs lower S content, but too low S content can increase the cost of steel desulfurization.Technical solution of the present invention is set S content≤0.010%.
[oxygen]: O is the element that can not avoid completely in steelmaking process, has stronger avidity with other many elements, is easy to form various inclusiones, unfavorable to the performance of steel.In addition, O too high levels, can cause the sharply reduction and obvious aging phenomenon of gap-free atom cold-rolling steel-plate punch performance equally.Technical solution of the present invention is set O content≤0.0025%.
[nitrogen]: N is harmful impurity element in gap-free atom cold-rolled steel sheet, and the intensity of steel is raise, and unit elongation declines, and is also unfavorable for obtaining favourable punching performance at low-temperature annealing temperature.N is also the element that forms timeliness simultaneously, therefore requires to reduce N content.Technical solution of the present invention is set N content≤0.0025%.
[aluminium]: Al adds in gapless atomic steel as reductor in steelmaking process, and it is favourable that simultaneously Al can also fix the aging resistance that a part of N atom pairs ensures steel plate in steel.The effect of guarantee deoxidation in the time that Al content is greater than 0.015% in steel.But when Al measures when too high, can increase cost of alloy, also can form in addition the oxide compound Al of too much deoxidation products Al 2o 3be mingled with.It is 0.015~0.05% that technical solution of the present invention is set Al content range.
[titanium]: Ti is strong carboritride forming element, and after adding Ti, and C, N atom are completely fixed and really realize in steel gapless solid solution atom and exist.Ti in IF steel except with C, N in conjunction with, also to form sulfide (TiS, Ti 4C2 S2) with S.But Ti content can not be too high, too high Ti content can be increased sharply the recrystallization temperature of gap-free atom cold-rolled steel sheet, thereby needs higher annealing temperature.It is 0.03~0.07% that technical solution of the present invention is set Ti content.Also set the condition that between Ti and C, N, O content, ratio should be satisfied, object is that Ti in order to ensure to add can be enough in conjunction with C, N atom, and has suitable residual content simultaneously.
Technology theory in the invention described above technical scheme is according to being:
One, hot rolling technology
1, continuous casting steel billet Heating temperature
To there is the dissolving of AlN and Ti (C, N) second phase particles in the heat-processed of gapless atomic steel continuous casting steel billet.If Heating temperature exceedes 1160 DEG C, second phase particles is separated out precipitate more tiny, disperse again in hot rolling reeling process after dissolving, suppress to grow up at recrystallize cold rolling, the rear crystal grain of annealing subsequently, the recrystallization temperature of steel plate is raise, can not adapt to low annealing temperature.But Heating temperature can not be too low, if Heating temperature is too low, due to the natural temperature drop in course of hot rolling, cannot ensure the higher finishing temperature that the present invention requires.
2, Coil Box
Coil Box is after the Main Function of the course of hot rolling of gap-free atom cold-rolled steel sheet is to batch by Coil Box, make the temperature homogenizing more of intermediate blank volume, can reach like this effect of two aspects: on the length direction with steel, temperature is more even, make with steel toe, in, the property retention of tail is consistent; The temperature drop that reduces steel edge portion, because the Ar3 transformation temperature of gap-free atom cold-rolled steel sheet is high, under common rolling state, steel edge portion temperature drop is large, easily enters two-phase region rolling, makes the final poor performance of cold-rolled steel edges of boards portion.
3, finish rolling start rolling temperature
Three iron scales of the too high easy formation of finish rolling start rolling temperature, gapless atomic steel is very soft, and three times iron scale is easily pressed into surface of steel plate, in acid cleaning process subsequently, can form pit, affects surface of cold-rolled steel plate quality.The too low finish rolling end temp that can not ensure of final rolling temperature.Therefore to set finish rolling start rolling temperature be 960 DEG C~1020 DEG C in the present invention.
4, finish rolling end temp
The hot rolling finish to gauge of gap-free atom cold-rolled steel sheet need to be in austenitic area rolling, and finishing temperature will be higher than Ar3 transformation temperature, and from the angle of refine austenite grain fineness number and the alligatoring of promotion precipitate, finishing temperature can not be too high.Therefore technical solution of the present invention setting finish rolling end temp is 900 DEG C~950 DEG C, is preferably 920 DEG C.
4, coiling temperature after finish rolling
Along with the rising of coiling temperature, the recrystallization temperature of gap-free atom cold-rolled steel sheet declines, and press formability index r value improves.The present invention is in order to reduce the recrystallization temperature of gap-free atom cold-rolled steel sheet, and setting coiling temperature after lower finish rolling is 600 DEG C~700 DEG C, is preferably 680 DEG C.While selecting 680 DEG C, can make the abundant alligatoring of precipitate, be unlikely to again to make the iron scale of belt steel surface to have a strong impact on acid cleaning process subsequently.
Two, cold-rolling process
1, cold rolling draft
The r value of gap-free atom cold-rolled steel sheet increases and monotone increasing with cold rolling draft, particularly in the time that lesser temps is annealed.This is because increase cold rolling draft, makes to store in steel plate more deformation energy, increases recrystallize motivating force, reduce recrystallization temperature and can make in cold rolling texture 111} component increases, thus make after annealing 111) texture strengthens.Gap-free atom cold-rolled steel sheet can obtain good stamping performance at cold rolling draft >=80%, but mill load increases obviously in the time that draft exceedes 90%, and cold-rolled process stability is bad, easily causes broken belt accident; The present invention preferably cold rolling draft is 85%~90%.
2, the continuous annealing time
Gap-free atom annealing process is the process of a deformed grains recovery and recrystallization, needs free guarantee in kinetics.As too short in the time, can not carry out sufficient recovery and recrystallization, can not get good stamping performance.As overlong time, affect production efficiency on the one hand, on the other hand because C atom is spread to intracrystalline by crystal boundary, reduce the grain-boundary strength of gap-free atom cold-rolled steel sheet, make Interstitial Atom Free Sheet Steel there is two times punch fragility, use properties worsens.
3, smooth unit elongation
After the annealing of gap-free atom cold-rolled steel sheet, need to carry out smooth to reach the surfaceness of needs and to control steel-plate shape.Therefore need a minimum smooth unit elongation, unit elongation can not be too high, exceedes 1.2% and can cause that steel plate yield strength is too high, and cause the reduction of punching performance.
In a word, technical characterstic and beneficial effect that low temperature continuous annealing gap-free atom cold-rolled steel sheet of the present invention and production method thereof have are: 1) by controlling C content and rationally adding Ti element and control inevitable impurity element, obtain the micro components of complete gapless solid solution atom, for establishing composition basis compared with obtaining good impact briquetting performance under low temperature thermal oxidation; 2) by the control of suitable cold roling reduction, store enough energy of deformation, reduce recrystallization temperature and form sufficient cold rolling heterogeneous microstructure; 3) by rational slab heating temperature, batch case technique, finish rolling end temp, coiling temperature control AlN and Ti (C, N) second phase particles dissolving, separate out and alligatoring, and ensure reduce band steel length direction and width temperature homogeneity the recrystallization temperature of steel plate and obtain good hot rolling heterogeneous microstructure; Therefore can adapt to lower continuous annealing temperature (710~740 DEG C), thereby reduce equipment cost and energy consumption, reduce controlling of production process difficulty, avoid product defects and industrial accident.
Brief description of the drawings
Below in conjunction with accompanying drawing, low temperature continuous annealing gap-free atom cold-rolled steel sheet of the present invention and production method thereof are described further.
Fig. 1 is the curve that the hardness of the low temperature continuous annealing gap-free atom cold-rolled steel sheet of specific embodiment of the invention embodiment mono-changes with annealing soaking time.
Fig. 2 is the metallographic structure figure of the low temperature continuous annealing gap-free atom cold-rolled steel sheet of specific embodiment of the invention embodiment mono-.
Embodiment
The low temperature continuous annealing gap-free atom cold-rolled steel sheet of this embodiment is divided into four embodiment by the difference of its composition and content, and composition and mass percentage content that the cold-rolled steel sheet of four embodiment contains are as shown in table 1:
Composition and mass percentage content when the steel-making of table 1 cold-rolled steel sheet
The production method of the cold-rolled steel sheet of four embodiment of this embodiment, comprises steel making working procedure, hot-rolled process, cold rolling process and continuous annealing operation.
Steel making working procedure comprises: adopt molten iron pre-desulfurization; converter top bottom blowing; LF stove heats up and ensures that bottom blowing Ar churning time is greater than 5 minutes; RH stove carries out vacuum circulation degassing processing; ensure that the pure degassed time of RH is greater than 15 minutes; then adopt low-carbon steel protecting slag, whole process is blown Ar protective casting and is become continuous casting steel billet.
Hot-rolled process comprises: continuous casting steel billet is after process furnace reheats, rolling on Continuous Heat tandem rolling mill, hot-rolled process parameter control is in table 2, after roughing milling train and the rolling of finish rolling tandem rolling unit, carry out laminar flow cooling, then batch, produce qualified hot-rolled sheet coil, product thickness is 2.0-5.0mm.
In hot-rolled process, as shown in table 2 for the processing parameter of controlling hot rolling separately of the cold-rolled steel sheet of above-mentioned four embodiment:
Table 2 hot-rolled process parameter
Hot Rolling Parameters Heating of plate blank Finish rolling starts Finish rolling finishes Coiling temperature Product thickness
Temperature/DEG C Temperature/DEG C Temperature/DEG C /℃ /mm
Set 1080-1160 960-1020 900-950 600-700 2.0-5.0
Embodiment mono- 1100 1020 920 680 5.0
Embodiment bis- 1130 980 930 700 3.5
Embodiment tri- 1160 1000 900 600 2.0
Embodiment tetra- 1080 960 950 640 4.5
Cold rolling process comprises: the interstitial-free hot-rolled steel of above-mentioned hot rolling is rolled up to uncoiling again after overpickling is fallen scale on surface, on cold continuous rolling or on reciprocating single stand mill through after repeatedly cold rolling, and by after cold rolling roll steel band after hard state after continuous annealing through smooth, the control of cold-rolling process parameter is in table 3, and the steel band rolling after hard state after cold rolling obtains the finished product cold-rolled steel sheet that thickness is 0.2~1.0mm after continuous annealing.Cold rolling draft sets >=80%, is preferably 85%~90%.
Annealing operation comprises: steel band is 710~740 DEG C in the annealing region of the soaking zone of continuous annealing furnace, is 60~160s with steel in the time of soaking zone, adopts flattening process after annealing, and smooth unit elongation is 0.3~1.2%, and parameter and annealing control is in table 3.
Cold rolling and the parameter and annealing of table 3
The mechanical property detected result of the cold-rolled steel sheet of above-mentioned four embodiment and the grading of micro-grain fineness number are as shown in table 4:
Table 4 mechanical property measuring result
Appoint curve that the hardness of the cold-rolled steel sheet of getting above-mentioned four embodiment (as embodiment bis-) in annealing operation changes with annealing soaking time as shown in Figure 1; This cold-rolled steel sheet is done to metallurgical analysis, as shown in Figure 2 simultaneously.Can find out from table 4 and Fig. 1, Fig. 2, the cold-rolled steel sheet of above-mentioned four embodiment all has good stamping performance, and microstructure grain size number reaches I6.5~I8.0 level.
Low temperature continuous annealing gap-free atom cold-rolled steel sheet of the present invention and production method thereof are not limited to the concrete technical scheme described in above-described embodiment, and the technical scheme that all employings are equal to replacement formation is the protection domain that the present invention requires.

Claims (6)

1. a low temperature continuous annealing gap-free atom cold-rolled steel sheet, is characterized in that the temperature of described cold-rolled steel sheet in the time of continuous annealing is 710-740 DEG C; The composition that described cold-rolled steel sheet contains and mass percentage content are: C:0.0009~0.0018%, Si≤0.03%, Mn:0.05-0.2%, P≤0.015%, S≤0.01%, O≤0.0025%, N≤0.0025%, Al:0.015~0.050%, Ti:0.047~0.050%, all the other are Fe and inevitable tramp element; The ratio X of the mass percentage content of described Ti composition and C composition, N composition and S composition meets following formula,
The continuous casting steel billet Heating temperature of described cold-rolled steel sheet in the time of hot rolling is 1080~1160 DEG C, draft >=80% of described cold-rolled steel sheet when cold rolling, described ratio X is 1.5~2.0, intermediate blank after the roughing of described cold-rolled steel sheet in the time of hot rolling after Coil Box rolling again uncoiling enter 7 passage finish rolling, the finish rolling start rolling temperature of described cold-rolled steel sheet in the time of hot rolling is 960 DEG C~1020 DEG C, the finish rolling end temp of described cold-rolled steel sheet in the time of hot rolling is 900 DEG C~950 DEG C, and after the finish rolling of described cold-rolled steel sheet in the time of hot rolling, coiling temperature is 600 DEG C~700 DEG C; The soaking zone time of described cold-rolled steel sheet in the time of continuous annealing is 60~160s.
2. cold-rolled steel sheet according to claim 1, is characterized in that the smooth unit elongation of described cold-rolled steel sheet when smooth is 0.3~1.2%.
3. according to cold-rolled steel sheet described in claim 1 or 2, the mass percentage content that it is characterized in that described Mn composition is 0.08~0.15%; Described finish rolling end temp is 920 DEG C, and after described finish rolling, coiling temperature is 680 DEG C, and described draft is 85%~90%.
4. the production method of a low temperature continuous annealing gap-free atom cold-rolled steel sheet, comprise steel making working procedure, hot-rolled process, cold rolling process and continuous annealing operation, it is characterized in that composition and the mass percentage content of in described steel making working procedure, controlling described cold-rolled steel sheet are: C:0.0009~0.0018%, Si≤0.03%, Mn:0.05-0.2%, P≤0.015%, S≤0.01%, O≤0.0025%, N≤0.0025%, Al:0.015~0.050%, Ti:0.047~0.050%, all the other are Fe and inevitable tramp element; In described hot-rolled process, the Heating temperature of controlling continuous casting steel billet is 1080~1160 DEG C, and in described continuous annealing operation, control temperature is 710-740 DEG C; In described cold rolling process, control draft >=80%, in described hot-rolled process, control intermediate blank after roughing after Coil Box rolling again uncoiling enter 7 passage finish rolling, controlling finish rolling start rolling temperature is 960 DEG C~1020 DEG C, controlling finish rolling end temp is 900 DEG C~950 DEG C, and after control finish rolling, coiling temperature is 600 DEG C~700 DEG C; In described continuous annealing operation, the time of controlling soaking zone is 60~160s.
5. production method according to claim 4, characterized by further comprising smooth operation after annealing; In described smooth operation, controlling smooth unit elongation is 0.3~1.2%.
6. according to the production method described in claim 4 or 5, the mass percentage content that it is characterized in that described Mn composition is 0.08~0.15%; Described finish rolling end temp is 920 DEG C, and after described finish rolling, coiling temperature is 680 DEG C, and described draft is 85%~90%.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1888113A (en) * 2005-06-29 2007-01-03 宝山钢铁股份有限公司 Soft tin-plate of hardness HR30T 51+/-3 and its making process
CN1888114A (en) * 2005-06-29 2007-01-03 宝山钢铁股份有限公司 Soft tin-plate and its making process
CN101082107A (en) * 2007-06-29 2007-12-05 武汉钢铁(集团)公司 Ultra-low carbon cold-rolling deep-punching glassed steel and method of production
CN101608285A (en) * 2009-07-13 2009-12-23 山西太钢不锈钢股份有限公司 A kind of interstitial-free hot-rolled steel strip and manufacture method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030555A1 (en) * 1995-03-27 1996-10-03 Nippon Steel Corporation Ultralow-carbon cold-rolled sheet and galvanized sheet both excellent in fatigue characteristics and process for producing both
TW515847B (en) * 1997-04-09 2003-01-01 Kawasaki Steel Co Coating/baking curable type cold rolled steel sheet with excellent strain aging resistance and method for producing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1888113A (en) * 2005-06-29 2007-01-03 宝山钢铁股份有限公司 Soft tin-plate of hardness HR30T 51+/-3 and its making process
CN1888114A (en) * 2005-06-29 2007-01-03 宝山钢铁股份有限公司 Soft tin-plate and its making process
CN101082107A (en) * 2007-06-29 2007-12-05 武汉钢铁(集团)公司 Ultra-low carbon cold-rolling deep-punching glassed steel and method of production
CN101608285A (en) * 2009-07-13 2009-12-23 山西太钢不锈钢股份有限公司 A kind of interstitial-free hot-rolled steel strip and manufacture method thereof

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