CN101684533A - High strength cold-rolled plate with excellent formability and production method thereof - Google Patents

High strength cold-rolled plate with excellent formability and production method thereof Download PDF

Info

Publication number
CN101684533A
CN101684533A CN200810013481A CN200810013481A CN101684533A CN 101684533 A CN101684533 A CN 101684533A CN 200810013481 A CN200810013481 A CN 200810013481A CN 200810013481 A CN200810013481 A CN 200810013481A CN 101684533 A CN101684533 A CN 101684533A
Authority
CN
China
Prior art keywords
steel
temperature
cold
rolling
strength
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN200810013481A
Other languages
Chinese (zh)
Inventor
于宁
刘嵩
王春刚
安晓光
赵永悦
何毅
丛劲松
王越
杨卫
黄秋菊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN200810013481A priority Critical patent/CN101684533A/en
Publication of CN101684533A publication Critical patent/CN101684533A/en
Pending legal-status Critical Current

Links

Abstract

The invention provides a high strength cold-rolled plate with excellent formability, containing: no more than 0.0040% of C, 0.02-0.15% of Si, 0.20-1.00% of Mn, 0.02-0.09% of P, 0.015-0.06% Ti, 0.01-0.05% of Nb, and the rest being Fe. The production method comprises: smelting, continuous casting, hot-rolling, cold rolling and continuous annealing, wherein the heating temperature of the hot-rolled billet is 1170-1270 DEG C, the finishing temperature of hot-rolling is 850-960 DEG C, and the coiling temperature is 650-760 DEG C; the cold rolling reduction percent is 60-82%; the annealing temperature is 760-880 DEG C, the thermal insulation time is 60-210s, the slow-cooling segment temperature is 630-700 DEG C, and the fast-cooling exit temperature is 300-500 DEG C; and the levelling elongationrate is 0.5-1.0%. The high strength steel plate containing phosphorus of the invention has the features of low carbon, microalloying and purity. The steel added with a certain amount of Nb and Ti hashigher plasticity. Using relevant rolling and annealing technique, the indexes of performance of the steel achieves the demand of high strength automobile stamping parts.

Description

High strength cold-rolled plate and production method thereof with excellent formability
Technical field
The invention belongs to the steel products technical field, relate in particular to a kind of high strength cold-rolled plate that has excellent moldability and production method thereof.
Background technology
Automobile factory generally adopts mild steel such as St13 and St14 to do the stamping parts of automobile both at home and abroad, and this class steel is easy to distortion at the punching course light plate, but because intensity is low, the ability of its anti-collision and depression is low, and safety performance is bad, so be unfavorable for protecting driver and crew.
Adopt High Strength Steel Plate not only can solve this type of problem, simultaneously, because the increase of the intensity of steel, the thickness of steel plate also can reduce, thereby alleviates the weight of automobile, in energy-intensive today, just can effectively reduce oil product consumption, improve resource utilization, also help automobile factory and capture the selling market.
At present, the technology that adopts phosphorus to produce high-strength steel as main strengthening element all has report both at home and abroad, though resemble process, implementation has tangible difference.
High Mn content is adopted in the design that has, and its shortcoming is that the anisotropy of steel is big.For example, application number is 99118334.7, the Chinese patent of " high strength phosphorated steel and manufacture method thereof " by name, the design that this patent adopts is high-carbon, phosphorates, and does not add alloying element, by the segregation of phosphorus at the crystal boundary place, reach the purpose of grain refining, realize the raising of the intensity of steel, the product plasticity index that adopts this mode to produce is bad, when causing deep processing, the plasticity of steel is bad.Be 200510051717.X also as application number, the Chinese patent of " high strength cold rolled steel plate and manufacture method thereof " by name, that this patent adopts is high Mn, high Als, Als content is 0.1%~1.0%, need add a large amount of ferro-aluminums during smelting, and cost is increased.
Summary of the invention
The objective of the invention is to overcome above-mentioned existing in prior technology defective, provide a kind of and can satisfy the automotive industry needs, have the high strength cold-rolled plate and the production method thereof of excellent formability.
The present invention is achieved in that the chemical component weight per-cent of the high strength cold-rolled plate that this has excellent formability: C≤0.0040%, Si:0.02%~0.15%, Mn:0.20%~1.00%, P:0.02%~0.09%, S≤0.025%, AL S≤ 0.06%, Ti:0.015%~0.06%, Nb:0.01%~0.05%, N≤0.005%, surplus is Fe and unavoidable impurities.
The chemical component weight per-cent of high strength cold-rolled plate of the present invention preferably can be: C≤0.0040%, Si:0.02%~0.10%, Mn:0.20%~0.55%, P:0.02%~0.05%, Ti:0.015%~0.045%, Nb:0.01%~0.04%, surplus are Fe and unavoidable impurities; Also can be: C≤0.0040%, Si:0.02%~0.10%, Mn:0.30%~0.70%, P:0.05%~0.07%, Ti:0.03%~0.06%, Nb:0.01%~0.04%, surplus be Fe and unavoidable impurities; Can also be: C≤0.0040%, Si:0.04%~0.15%, Mn:0.70%~1.00%, P:0.05%~0.09%, Ti:0.03%~0.06%, Nb:0.02%~0.05%, surplus be Fe and unavoidable impurities.Can also add B in the steel of the present invention, its content weight percent is 0.0003%~0.0015%.
Production method with high strength cold-rolled plate of excellent formability of the present invention comprises smelting, continuous casting, hot rolling, cold rolling, continuous annealing, finishing, be characterized in that described hot rolled billet heating temperature is 1170~1270 ℃, hot rolling finishing temperature is 850~960 ℃, and coiling temperature is 650~760 ℃; Cold rolling draft is 60%~82%; Annealing temperature is 760~880 ℃, soaking time 60~210s, 630~700 ℃ of slow cooling section temperature, 300~500 ℃ of fast cold section temperature outs; Smooth unit elongation 0.5%~1.0%.
The described cold rolling draft of high strength cold-rolled plate of the present invention is preferably 70%~75%; Described annealing temperature is preferably 800~820 ℃, and soaking time is preferably 120~180s.
Composition design reason of the present invention:
The phosphorous high tensile steel plate of the present invention has characteristics such as Ultra-low carbon, microalloying, steel be pure, have lower yield strength and advantages of higher tensile strength, simultaneously, certain Nb, Ti alloy in steel, have been added, C, N in the steel are existed in steel with the form of second phase, make steel have high plasticity.Added P, Mn, Si content in the steel intensity of steel is improved, but plasticity index can reduce, therefore, must formulate rational composition design.
Ti content adds and too much will exist with the solid solution form in steel, simultaneously, when high temperature Ti easily with steel in P react, generate the FePTi of chemical combination attitude, FePTi has reduced the solution strengthening effect of phosphorus, to the intensity reduction and the reduction of r value of steel, therefore, should control Ti content in the steel in right amount.Ti content is low, and the C in the steel, N atom can not be completely fixed, and be unfavorable to the plasticity of steel; Ti content height causes the waste of production cost.Ti content of the present invention is controlled at 0.015%~0.06%.
In order to reduce the anisotropy of Ti steel, need to add certain Nb in the steel, in the high-strength IF steel plate that Ti+Nb handles, the adding of excessive Nb will make the Nb nucleidic mass of solid solution in the steel increase, and be unfavorable for that recrystallize carries out, and make the recrystallization temperature and the time lengthening of steel.Nb content is low, and the C in the steel, N atom can not be completely fixed.The present invention is controlled at 0.01%~0.05% with Nb content.
Consider the temperature of separating out that temperature is lower than C, N in the steel and Ti, Nb reaction of separating out of FePTi in the steel, in the composition design, should be taken into account that in theory the interpolation of Ti, Nb should meet Ti=4*C+3.43*N+1.5S and Nb=7.76*C, on the maximum addition of Ti, after should guaranteeing the C reaction formation precipitated phase in Ti and the steel, remaining solid solution C can react with the Nb in the steel, exists with the precipitated phase form.
P: be a kind of harmful element, can increase the fragility of steel, but in soft steel, suitably increase phosphorus content, little to the forming property influence of steel, but can improve the intensity of steel greatly.Phosphorus content added low, and was little to the intensity effect of steel, and the fragility of too high then steel and segregation influence plasticity, and therefore, P content scope of design is 0.02%~0.09%.
Mn is the solution strengthening element in steel, can improve the intensity of steel, and simultaneously, Mn can separate out with compound second mutually the form with S, Ti in the steel, C, N, and the precipitated phase in the steel is increased, and improves the plasticity of steel.Mn content scope of design is: 0.20%~1.00%, adjust Mn content upper and lower limit in the steel according to the intensity rank of steel.
Si is the solution strengthening element in steel, improves the intensity of steel, but the Si too high levels will influence the plasticity of steel.Si content scope of design is: 0.02%~0.15%, adjust Si content upper and lower limit in the steel according to the intensity rank of steel.
Al: suppress the solid solution of nitrogen in ferrite, eliminate strain aging, improve cold plasticity.
B: in ultra low-carbon steel, the P element is easily in the segregation of crystal boundary place, add a small amount of B after because B is gathered in crystal boundary in the IF steel, the crystal boundary bonding force is strengthened, simultaneously, B has suppressed the segregation of P at the crystal boundary place, has overcome crystal boundary fragility.Compound interpolation B and Nb can make the obvious refinement of IF steel annealed structure crystal grain that contains Ti.The B element adds few, does not have above-mentioned effect, and it is excessive that the B element adds, and causes the steel plate sclerosis easily, influences plasticity.
The present invention has adopted and added molten admittedly strengthening element such as certain Nb, Ti alloy and P, Mn, Si in steel, make steel have low yield strength and high tensile strength and plasticity preferably, be fit to the use of car surface spare and inner structural members, simultaneously, even if also change the original sentence to other products when this product goes wrong aborning easily, can reduce loss.
Operational path of the present invention: hot metal pretreatment → converter → refining (RH) → continuous casting → hot continuous rolling → cold-rolling pickling unit → cold rolling → continuous annealing → finishing unit → packing.
Technological design reason of the present invention:
Hot rolling steel billet Heating temperature of the present invention is 1170~1270 ℃, hot rolling finishing temperature is 850~960 ℃, employing high temperature batches, coiling temperature is 650~760 ℃, and this is can form tiny and uniform ferrite and big and equally distributed two-phase particle in the above hot rolling of recrystallization temperature in order to ensure steel.
Cold-rolling process of the present invention when obtaining high R value, can obtain high unit elongation by rational draft.The increase of cold rolling draft increases recrystallize energy storage broken in the tissue after cold rolling, and in cold rolled annealed process, recrystallize forming core particle increases, and the recrystallize time opening in advance.At holding stage subsequently, the time of grain growth prolongs relatively, helps obtaining separating out, assembling of the big crystal grain and second phase, forms favorable texture, it is favourable to obtain good unit elongation and R value, if but the draft of cold rolling employing is excessive, can cause in the steel recrystallize forming core particle too much, and the motivating force of grain growth mainly come from the interfacial energy between the crystal boundary, interfacial energy circle difference increases, like this, cause the inner crystal grain of steel inhomogeneous easily, influence the unit elongation of steel.The present invention is controlled at 60%~82% with cold rolling draft, and best draft is 70%~75%, at this moment, can obtain high R value and high unit elongation.
The annealing holding stage also forms in this stage the vital fiber texture of deep drawability, and therefore, annealing process plays a decisive role to the deep drawability of high-strength IF steel.Along with the raising of annealing temperature, crystal grain increases.This has illustrated that annealing temperature is high more, and recrystallize and recrystal grain are grown up abundant more, and be favourable more to deep drawability, but the yield strength of steel and tensile strength will reduce, and unit elongation and R value, n value increase.Therefore, need to formulate the rational heat treatment temperature, can obtain unit elongation and R value, n value that high yield strength can obtain again is the heat treated key of production phosphor-containing steel.
Annealing temperature of the present invention is 760 ℃~880 ℃, and best annealing temperature is 800 ℃~820 ℃; Reasonably soaking time is 60~210s, and best soaking time is 120~180s, can obtain all extraordinary effects of composite target such as intensity and plasticity.Phosphor-containing steel can not be annealed again, because again after the annealing, will make separating out of FeTiP phase in the steel, and melt back takes place the compound two-phase particle that TiNbCN is bigger.Soaking time is too short, will make recrystallize insufficient, and the two-phase particle can not be assembled fully.Make crystal grain meticulous, influence the unit elongation of steel.Evenly the growing up of two-phase particle that increase to of soaking time provides the time with poly-partially, can occur the bigger compound two-phase particle of TiNbCN in the steel.But along with the continuation of soaking time increases, tiny two-phase particle in the steel presents poly-partially phenomenon, and is therefore bigger to the pinning effect of crystal boundary, hinders dislocation motion, unfavorable to the development of annealing texture, and the development of obstruction recrystallization texture influences the unit elongation of steel.
The present invention is controlled at 630~700 ℃ with the slow cooling section temperature, and fast cold section temperature out is controlled at 300~500 ℃, and smooth unit elongation is 0.5%~1.0%, the performance that this helps obtaining.
The phosphorous high tensile steel plate of the present invention has characteristics such as Ultra-low carbon, microalloying, steel be pure, certain Nb, Ti alloy in steel, have been added, C, N in the steel are existed in steel with the form of second phase, make steel have high plasticity, and the common ultra low-carbon steel of the anisotropy ratio of steel is little.Adopt corresponding hot rolling, cold rolling and annealing process, the steel of producing has good plasticity and very high intensity, can satisfy the requirement of high-strength vehicle stamping parts performance index.Cost of the present invention increases little, but effect stability, remarkable in economical benefits.
Embodiment
The present invention is further described by the following embodiment.
Table 1 is the chemical ingredients of embodiment of the invention steel plate.
Table 2 is the rolling technological parameter of the embodiment of the invention.
Table 3 is the continuous annealing process parameter of the embodiment of the invention.
Table 4 is the detection performance of embodiment of the invention steel plate.
The chemical ingredients of table 1 embodiment of the invention steel plate (wt, %)
Embodiment ??C ??Si ??Mn ??P ??S ??Als ??Ti ??N ??Nb ??B
??1 ??0.0021 ??0.05 ??0.52 ??0.045 ??0.010 ??0.035 ??0.043 ??0.0024 ??0.030 ??-
??2 ??0.0025 ??0.03 ??0.54 ??0.041 ??0.011 ??0.033 ??0.025 ??0.0034 ??0.040 ??-
??3 ??0.0019 ??0.09 ??0.31 ??0.024 ??0.009 ??0.029 ??0.042 ??0.0034 ??0.038 ??-
??4 ??0.0017 ??0.08 ??0.33 ??0.046 ??0.007 ??0.027 ??0.045 ??0.0018 ??0.039 ??-
??5 ??0.0027 ??0.08 ??0.60 ??0.063 ??0.007 ??0.027 ??0.047 ??0.0018 ??0.031 ??-
??6 ??0.0017 ??0.05 ??0.58 ??0.055 ??0.012 ??0.042 ??0.041 ??0.0028 ??0.037 ??-
??7 ??0.0028 ??0.08 ??0.63 ??0.067 ??0.012 ??0.042 ??0.045 ??0.0022 ??0.030 ??-
??8 ??0.0015 ??0.04 ??0.68 ??0.069 ??0.012 ??0.042 ??0.055 ??0.0029 ??0.017 ??-
??9 ??0.0023 ??0.09 ??0.92 ??0.062 ??0.018 ??0.039 ??0.042 ??0.0035 ??0.038 ??-
??10 ??0.0021 ??0.12 ??0.88 ??0.069 ??0.013 ??0.039 ??0.049 ??0.0017 ??0.028 ??-
??11 ??0.0018 ??0.11 ??0.76 ??0.083 ??0.008 ??0.029 ??0.053 ??0.0017 ??0.025 ??-
??12 ??0.0024 ??0.09 ??0.25 ??0.039 ??0.011 ??0.048 ??0.044 ??0.0032 ??0.032 ??0.0009
??13 ??0.0018 ??0.06 ??0.51 ??0.032 ??0.010 ??0.037 ??0.055 ??0.0025 ??0.024 ??0.0012
??14 ??0.0016 ??0.08 ??0.92 ??0.055 ??0.009 ??0.042 ??0.033 ??0.0025 ??0.044 ??0.0006
Table 2 embodiment of the invention rolling technological parameter
Embodiment Heating temperature (℃) Hot rolling finishing temperature (℃) The hot rolling reeling temperature (℃) Cold rolling draft (%)
??1 ??1202 ??901 ??708 ??68
??2 ??1245 ??889 ??697 ??81
??3 ??1190 ??924 ??727 ??66
??4 ??1233 ??920 ??713 ??73
??5 ??1201 ??904 ??702 ??72
??6 ??1241 ??897 ??735 ??73
??7 ??1239 ??902 ??701 ??70
??8 ??1270 ??929 ??715 ??69
??9 ??1255 ??915 ??712 ??64
??10 ??1228 ??917 ??705 ??69
??11 ??1264 ??933 ??723 ??69
??12 ??1236 ??905 ??722 ??73
??13 ??1192 ??897 ??735 ??72
??14 ??1180 ??899 ??702 ??68
Table 3 embodiment of the invention continuous annealing process parameter
Embodiment Annealing temperature (℃) Soaking time (S) The slow cooling section temperature out (℃) Fast cold section temperature out (℃) Smooth unit elongation (%)
??1 ??812 ??88 ??653 ??402 ??0.6
??2 ??815 ??194 ??644 ??387 ??0.65
??3 ??796 ??121 ??655 ??409 ??0.70
??4 ??828 ??76 ??669 ??428 ??0.6
??5 ??821 ??132 ??667 ??416 ??0.7
??6 ??817 ??115 ??650 ??397 ??0.7
??7 ??815 ??144 ??642 ??399 ??0.6
??8 ??822 ??124 ??646 ??392 ??0.92
??9 ??799 ??133 ??655 ??422 ??0.5
??10 ??820 ??160 ??673 ??404 ??0.8
??11 ??809 ??95 ??677 ??427 ??0.7
??12 ??812 ??149 ??687 ??403 ??0.7
??13 ??817 ??105 ??649 ??396 ??0.5
??14 ??809 ??172 ??692 ??422 ??0.8
The performance of table 4 embodiment of the invention steel plate
Embodiment Yield strength MPa Tensile strength MPa Unit elongation % ??r ??n
??1 ??198 ??354 ??39 ??2.02 ??0.23
??2 ??191 ??347 ??40 ??2.12 ??0.24
??3 ??207 ??367 ??39 ??2.09 ??0.23
??4 ??210 ??356 ??38 ??1.95 ??0.25
??5 ??242 ??390 ??35 ??1.79 ??0.20
??6 ??229 ??374 ??37 ??1.86 ??0.22
??7 ??248 ??392 ??36 ??1.83 ??0.24
??8 ??252 ??387 ??35 ??1.79 ??0.19
??9 ??274 ??423 ??34
??10 ??269 ??437 ??35
??11 ??283 ??441 ??33
??12 ??212 ??362 ??38 ??2.09 ??0.24
??13 ??244 ??397 ??36 ??2.02 ??0.22
??14 ??281 ??429 ??33

Claims (8)

1. high strength cold-rolled plate with excellent formability, the chemical component weight per-cent that it is characterized in that this steel is: C≤0.0040%, Si:0.02%~0.15%, Mn:0.20%~1.00%, P:0.02%~0.09%, S≤0.025%, ALs≤0.06%, Ti:0.015%~0.06%, Nb:0.01%~0.05%, N≤0.005%, surplus are Fe and unavoidable impurities.
2. high strength cold-rolled plate according to claim 1 is characterized in that the chemical component weight per-cent of this steel is: Si:0.02%~0.10%, Mn:0.20%~0.55%, P:0.02%~0.05%, Ti:0.015%~0.045%, Nb:0.01%~0.04%.
3. high strength cold-rolled plate according to claim 1 is characterized in that the chemical component weight per-cent of this steel is: Si:0.02%~0.10%, Mn:0.30%~0.70%, P:0.05%~0.07%, Ti:0.03%~0.06%, Nb:0.01%~0.04%.
4. high strength cold-rolled plate according to claim 1 is characterized in that the chemical component weight per-cent of this steel is: Si:0.04%~0.15%, Mn:0.70%~1.00%, P:0.05%~0.09%, Ti:0.03%~0.06%, Nb:0.02%~0.05%.
5. according to claim 1,2,3 or 4 described high strength cold-rolled plates, it is characterized in that also containing in the steel B, its weight percent is 0.0003%~0.0015%.
6. the production method of each described high strength cold-rolled plate in the claim 1~5, comprise smelting, continuous casting, hot rolling, cold rolling, continuous annealing, finishing, it is characterized in that described hot rolled billet heating temperature is 1170~1270 ℃, hot rolling finishing temperature is 850~960 ℃, and coiling temperature is 650~760 ℃; Cold rolling draft is 60%~82%; Annealing temperature is 760 ℃~880 ℃, soaking time 60~210s, 630~700 ℃ of slow cooling section temperature, 300~500 ℃ of fast cold section temperature outs; Smooth unit elongation 0.5%~1.0%.
7. the production method of high strength cold-rolled plate according to claim 6 is characterized in that described cold rolling draft is 70%~75%.
8. the production method of high strength cold-rolled plate according to claim 6 is characterized in that described annealing temperature is 800~820 ℃, and soaking time is 120~180s.
CN200810013481A 2008-09-27 2008-09-27 High strength cold-rolled plate with excellent formability and production method thereof Pending CN101684533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200810013481A CN101684533A (en) 2008-09-27 2008-09-27 High strength cold-rolled plate with excellent formability and production method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200810013481A CN101684533A (en) 2008-09-27 2008-09-27 High strength cold-rolled plate with excellent formability and production method thereof

Publications (1)

Publication Number Publication Date
CN101684533A true CN101684533A (en) 2010-03-31

Family

ID=42047905

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200810013481A Pending CN101684533A (en) 2008-09-27 2008-09-27 High strength cold-rolled plate with excellent formability and production method thereof

Country Status (1)

Country Link
CN (1) CN101684533A (en)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102199727A (en) * 2011-05-17 2011-09-28 马鞍山钢铁股份有限公司 400MPa high-strength and high-forming-performance cold rolled steel plate and production method thereof
CN102644023A (en) * 2012-04-23 2012-08-22 武汉钢铁(集团)公司 Steel containing P and used for intermediate frequency (IF) automotive panel and production method thereof
CN102653840A (en) * 2011-03-04 2012-09-05 上海梅山钢铁股份有限公司 Color-coated and laminated cold-rolled substrate for household appliances and production method of color-coated and laminated cold-rolled substrate
CN102719768A (en) * 2011-03-29 2012-10-10 鞍钢股份有限公司 Cold-rolled steel plate for hydroforming and manufacture method thereof
CN102719740A (en) * 2012-03-29 2012-10-10 鞍钢股份有限公司 Method for producing ultra-low carbon high-strength cold rolling sheet
CN102732778A (en) * 2012-06-19 2012-10-17 马钢(集团)控股有限公司 340MPa-grade high-strength cold-rolled steel plate used for deep-drawing, and production method thereof
CN102925796A (en) * 2012-10-30 2013-02-13 鞍钢股份有限公司 Non-alloyed ultra-low carbon structure cold-rolled sheet and production method thereof
CN103160735A (en) * 2011-12-14 2013-06-19 鞍钢股份有限公司 Ultrahigh strength cold-rolled steel sheet for automobile and production method thereof
CN103510001A (en) * 2012-06-29 2014-01-15 上海梅山钢铁股份有限公司 Cold-rolled steel plate for double-layer coil-welded tubes and production method thereof
CN104018079A (en) * 2014-06-18 2014-09-03 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet, preparation method thereof, galvanized steel sheet and preparation method thereof
CN104060071A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof as well as hot-galvanized steel sheet and preparation method thereof
CN104060168A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof, as well as hot-galvanized steel sheet and preparation method thereof
CN104060066A (en) * 2013-06-07 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof
CN104060072A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof, as well as hot-galvanized steel sheet and preparation method thereof
CN104060166A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof, as well as hot-galvanized steel sheet and preparation method thereof
CN104120345A (en) * 2014-07-16 2014-10-29 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof, and galvanized steel plate and preparation method thereof
CN104120346A (en) * 2014-07-16 2014-10-29 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof, and galvanized steel plate and preparation method thereof
CN104131144A (en) * 2014-07-16 2014-11-05 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate, making method of cold-rolled steel plate, galvanized steel plate and making method of galvanized steel plate
CN104131223A (en) * 2014-07-16 2014-11-05 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and making method thereof
CN104195430A (en) * 2014-07-16 2014-12-10 攀钢集团攀枝花钢铁研究院有限公司 Cold-roll steel sheet, manufacturing method thereof, galvanized steel sheet and manufacturing method thereof
CN104195434A (en) * 2014-09-22 2014-12-10 武汉钢铁(集团)公司 Hot galvanized high-strength steel with 390MPa tensile strength for internal structural member of saloon car and production method of hot galvanized high-strength steel
CN104372243A (en) * 2014-10-10 2015-02-25 河北钢铁股份有限公司邯郸分公司 440MPa grade cold rolled strip steel and production method thereof
CN104419877A (en) * 2013-09-05 2015-03-18 鞍钢股份有限公司 Weatherproof cold-rolled martensite steel and manufacturing method thereof
CN105568132A (en) * 2016-01-05 2016-05-11 河北钢铁股份有限公司邯郸分公司 180 MPa-grade cold-rolled ultralow carbon baking hardened steel and production method thereof
CN105714186A (en) * 2016-04-01 2016-06-29 唐山钢铁集团有限责任公司 Continuous annealing low-alloy and high-strength steel plate and production method thereof
CN105861929A (en) * 2016-04-15 2016-08-17 河北钢铁股份有限公司邯郸分公司 440 MPa-level cold rolling high-strength IF steel and production method thereof
CN106834938A (en) * 2017-01-17 2017-06-13 唐山钢铁集团有限责任公司 The high-strength galvanized steel of 400MPa grade ultra-low-carbons and its production method
CN107287505A (en) * 2017-08-04 2017-10-24 蒙城信和汽车有限公司 A kind of car panel steel and preparation method thereof
CN105483546B (en) * 2014-09-26 2017-10-31 宝山钢铁股份有限公司 A kind of welding processing and the cold-rolled steel sheet having excellent moldability and its manufacture method
CN107400829A (en) * 2017-08-07 2017-11-28 攀钢集团攀枝花钢铁研究院有限公司 A kind of ultra-low carbon baking hardening cold rolled steel sheet and preparation method thereof
CN111705263A (en) * 2020-06-22 2020-09-25 武汉钢铁有限公司 Strip steel with excellent low-temperature secondary processing performance and tensile strength of 440MPa and production method thereof

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102653840A (en) * 2011-03-04 2012-09-05 上海梅山钢铁股份有限公司 Color-coated and laminated cold-rolled substrate for household appliances and production method of color-coated and laminated cold-rolled substrate
CN102719768B (en) * 2011-03-29 2014-12-03 鞍钢股份有限公司 Cold-rolled steel plate for hydroforming and manufacture method thereof
CN102719768A (en) * 2011-03-29 2012-10-10 鞍钢股份有限公司 Cold-rolled steel plate for hydroforming and manufacture method thereof
CN102199727A (en) * 2011-05-17 2011-09-28 马鞍山钢铁股份有限公司 400MPa high-strength and high-forming-performance cold rolled steel plate and production method thereof
CN102199727B (en) * 2011-05-17 2013-06-19 马鞍山钢铁股份有限公司 400MPa high-strength and high-forming-performance cold rolled steel plate and production method thereof
CN103160735A (en) * 2011-12-14 2013-06-19 鞍钢股份有限公司 Ultrahigh strength cold-rolled steel sheet for automobile and production method thereof
CN103160735B (en) * 2011-12-14 2015-03-11 鞍钢股份有限公司 Ultrahigh strength cold-rolled steel sheet for automobile and production method thereof
CN102719740A (en) * 2012-03-29 2012-10-10 鞍钢股份有限公司 Method for producing ultra-low carbon high-strength cold rolling sheet
CN102644023A (en) * 2012-04-23 2012-08-22 武汉钢铁(集团)公司 Steel containing P and used for intermediate frequency (IF) automotive panel and production method thereof
CN102644023B (en) * 2012-04-23 2014-01-22 武汉钢铁(集团)公司 Steel containing P and used for intermediate frequency (IF) automotive panel and production method thereof
CN102732778A (en) * 2012-06-19 2012-10-17 马钢(集团)控股有限公司 340MPa-grade high-strength cold-rolled steel plate used for deep-drawing, and production method thereof
CN102732778B (en) * 2012-06-19 2014-04-02 马钢(集团)控股有限公司 340MPa-grade high-strength cold-rolled steel plate used for deep-drawing, and production method thereof
CN103510001A (en) * 2012-06-29 2014-01-15 上海梅山钢铁股份有限公司 Cold-rolled steel plate for double-layer coil-welded tubes and production method thereof
CN103510001B (en) * 2012-06-29 2016-08-24 上海梅山钢铁股份有限公司 A kind of double coiled welded tube cold-rolled steel sheet and production method thereof
CN102925796B (en) * 2012-10-30 2014-07-09 鞍钢股份有限公司 Non-alloyed ultra-low carbon structure cold-rolled sheet and production method thereof
CN102925796A (en) * 2012-10-30 2013-02-13 鞍钢股份有限公司 Non-alloyed ultra-low carbon structure cold-rolled sheet and production method thereof
CN104060066A (en) * 2013-06-07 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof
CN104419877A (en) * 2013-09-05 2015-03-18 鞍钢股份有限公司 Weatherproof cold-rolled martensite steel and manufacturing method thereof
CN104060072A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof, as well as hot-galvanized steel sheet and preparation method thereof
CN104060166A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof, as well as hot-galvanized steel sheet and preparation method thereof
CN104018079B (en) * 2014-06-18 2016-04-06 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104060072B (en) * 2014-06-18 2016-06-22 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104060166B (en) * 2014-06-18 2016-01-06 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104060168A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof, as well as hot-galvanized steel sheet and preparation method thereof
CN104060071A (en) * 2014-06-18 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof as well as hot-galvanized steel sheet and preparation method thereof
CN104018079A (en) * 2014-06-18 2014-09-03 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet, preparation method thereof, galvanized steel sheet and preparation method thereof
CN104060071B (en) * 2014-06-18 2016-06-15 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104060168B (en) * 2014-06-18 2016-04-06 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104195430A (en) * 2014-07-16 2014-12-10 攀钢集团攀枝花钢铁研究院有限公司 Cold-roll steel sheet, manufacturing method thereof, galvanized steel sheet and manufacturing method thereof
CN104131223A (en) * 2014-07-16 2014-11-05 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and making method thereof
CN104131144A (en) * 2014-07-16 2014-11-05 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate, making method of cold-rolled steel plate, galvanized steel plate and making method of galvanized steel plate
CN104120346A (en) * 2014-07-16 2014-10-29 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof, and galvanized steel plate and preparation method thereof
CN104120345B (en) * 2014-07-16 2016-03-02 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104131144B (en) * 2014-07-16 2016-03-09 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104120346B (en) * 2014-07-16 2016-03-09 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104120345A (en) * 2014-07-16 2014-10-29 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel plate and preparation method thereof, and galvanized steel plate and preparation method thereof
CN104131223B (en) * 2014-07-16 2016-01-20 攀钢集团攀枝花钢铁研究院有限公司 A kind of cold-rolled steel sheet and preparation method thereof
CN104195430B (en) * 2014-07-16 2016-03-02 攀钢集团攀枝花钢铁研究院有限公司 Cold-rolled steel sheet and preparation method thereof and hot-dip galvanizing sheet steel and preparation method thereof
CN104195434A (en) * 2014-09-22 2014-12-10 武汉钢铁(集团)公司 Hot galvanized high-strength steel with 390MPa tensile strength for internal structural member of saloon car and production method of hot galvanized high-strength steel
CN105483546B (en) * 2014-09-26 2017-10-31 宝山钢铁股份有限公司 A kind of welding processing and the cold-rolled steel sheet having excellent moldability and its manufacture method
CN104372243A (en) * 2014-10-10 2015-02-25 河北钢铁股份有限公司邯郸分公司 440MPa grade cold rolled strip steel and production method thereof
CN105568132A (en) * 2016-01-05 2016-05-11 河北钢铁股份有限公司邯郸分公司 180 MPa-grade cold-rolled ultralow carbon baking hardened steel and production method thereof
CN105714186A (en) * 2016-04-01 2016-06-29 唐山钢铁集团有限责任公司 Continuous annealing low-alloy and high-strength steel plate and production method thereof
CN105861929A (en) * 2016-04-15 2016-08-17 河北钢铁股份有限公司邯郸分公司 440 MPa-level cold rolling high-strength IF steel and production method thereof
CN105861929B (en) * 2016-04-15 2017-11-21 邯郸钢铁集团有限责任公司 A kind of 440MPa levels Cold Rolled High Strength IF Steel and its production method
CN106834938A (en) * 2017-01-17 2017-06-13 唐山钢铁集团有限责任公司 The high-strength galvanized steel of 400MPa grade ultra-low-carbons and its production method
CN107287505A (en) * 2017-08-04 2017-10-24 蒙城信和汽车有限公司 A kind of car panel steel and preparation method thereof
CN107400829A (en) * 2017-08-07 2017-11-28 攀钢集团攀枝花钢铁研究院有限公司 A kind of ultra-low carbon baking hardening cold rolled steel sheet and preparation method thereof
CN107400829B (en) * 2017-08-07 2019-02-01 攀钢集团攀枝花钢铁研究院有限公司 A kind of ultra-low carbon baking hardening cold rolled steel sheet and preparation method thereof
CN111705263A (en) * 2020-06-22 2020-09-25 武汉钢铁有限公司 Strip steel with excellent low-temperature secondary processing performance and tensile strength of 440MPa and production method thereof

Similar Documents

Publication Publication Date Title
CN101684533A (en) High strength cold-rolled plate with excellent formability and production method thereof
CN104928568A (en) Ferrite low-density high-strength steel and manufacturing method thereof
CN101701316B (en) Automobile beam steel with tensile strength of 590MPa and manufacturing method thereof
CN104928569B (en) A kind of low density steel of 800MPa level high ductibility and its manufacture method
CN102758133B (en) 1000MPa-level automobile steel with high product of strength and elongation and manufacturing method thereof
CN102839329B (en) Cold-rolling double-phase-steel steel plate with tensile strength of 450 MPa, and preparation method thereof
CN102912219A (en) High-strength plastic accumulation TRIP (Transformation-Induced Plasticity) steel plate and preparation method thereof
CN102409235A (en) High-strength cold rolling transformation induced plasticity steel plate and preparation method thereof
CN104694822A (en) High-strength hot rolled steel plate with 700 MPa grade yield strength and manufacturing method thereof
CN102031455A (en) Steel plate for stamping and quenching and manufacturing method thereof
CN108796363B (en) High-surface-quality aluminum-coated substrate steel suitable for large deformation and stamping and production method thereof
CN103451535B (en) A kind of 510MPa level automotive frame hot continuous rolling Strip and production technique thereof
CN105274432A (en) 600 MPa grade high-yield-ratio high-plasticity cold-rolled steel plate and manufacturing method thereof
CN107557673B (en) A kind of high-strength hot rolling acid-cleaning steel plate of high-elongation and its manufacturing method
CN104498821A (en) Medium-manganese high-strength steel for automobiles and production method thereof
CN104928456B (en) A kind of manufacture method for improving general chill ferritic lightweight steel ductility
CN103882320A (en) High-strength cold-rolled steel sheet having excellent stretch flangeability and spot welding property and manufacturing method of the steel sheet
CN109943778B (en) 590 MPa-grade cold-rolled dual-phase steel with excellent hole expansion performance and production method thereof
CN100392135C (en) Ultra-high strength strip steel and its production process
CN105543666A (en) Automobile beam steel with 960 MPa yield strength and production method thereof
CN102534373B (en) Super-high strength cold rolled steel belt suitable for rolling formation and manufacture method of super-high strength cold rolled steel belt
CN100473738C (en) Solution strengthening isotropical steel and preparation method thereof
CN110714165B (en) Cold-rolled sheet for 320 MPa-level household appliance panel and production method thereof
CN109943765B (en) 800 MPa-grade cold-rolled dual-phase steel with high yield ratio and preparation method thereof
CN109825768B (en) 780 MPa-grade ultrathin hot-galvanized dual-phase steel and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication

Open date: 20100331

C12 Rejection of a patent application after its publication