CN104419878A - Ultrahigh-strength cold rolled dual-phase steel with weatherability and manufacturing method of ultrahigh-strength cold rolled dual-phase steel - Google Patents
Ultrahigh-strength cold rolled dual-phase steel with weatherability and manufacturing method of ultrahigh-strength cold rolled dual-phase steel Download PDFInfo
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Abstract
The invention provides an ultrahigh-strength cold rolled dual-phase steel with weatherability and a manufacturing method of the ultra-high strength cold rolled dual-phase steel. The ultra-high strength cold rolled dual-phase steel is prepared from the following components in percentage by weigh (wt%): 0.10-0.16 percent of C, 0.10-0.50 percent of Si, 1.4-2.2 percent of Mn, 0.30-0.79 percent of Cr, 0.08-0.20 percent of Ni, 0.20-0.50 percent of Cu, 0.01-0.05 percent of Nb, 0.02-0.05 percent of Ti, 0.015-0.045 percent of Al, no larger than 0.020 percent of P, no larger than 0.007 percent of S, no larger than 0.008 percent of N and the balance of Fe and inevitable impurities. The manufacturing method comprises the following steps: according to the chemical components, smelting, and continuously casting to obtain a casting slab; reheating the casting slab until the temperature is above 1250 DEG C, and carrying out finish rolling, wherein the initial rolling temperature is 1040-1100 DEG C, the finishing temperature is 880-930 DEG C, the coiling temperature is 580-660 DEG C, and the cold rolling reduction is 60-70 percent; and carrying out continuous annealing with two stages of slow cooling and fast cooling. According to the manufacturing method, the ultra-high strength cold rolled dual-phase steel with the weatherability, the yield strength higher than 700 MPa, the tensile strength higher than 800 MPa and the elongation higher than 5 percent can be obtained.
Description
Technical field
The invention belongs to high strength cold-rolled dual phase steel production technical field, particularly relate to a kind of superhigh intensity cold rolling dual phase steel with weathering resistance for freight container, automobile etc. and manufacture method thereof.
Background technology
For encased conveying, in the urgent need to the freight container of lightweight to increase the transportable cargo weight of single, development trend is then use the freight container of long 45 to 53 feet more and more.Therefore, what first manufacture lightweight container was considered is exactly a bit by manufacturing high-strength steel to reduce steel plate thickness.Owing to being subject to the restriction of Hot Rolling Mill thickness aspect, the thickness of the weather-resistant steel plate adopting hot rolling to produce is general thicker.In order to adapt to the thinning demand of steel plate, exploitation yield strength 700MPa and above superhigh intensity cold rolling weather resisting steel plate thereof are more and more subject to the favor of freight container user, and the steel plate of this rank effectively can reduce steel consumption to reduce manufacturing cost.Ultrahigh-strength steel plates is produced larger than the steel difficulty of common intensity rank in steel mill, high to equipment requirements, and quality control is more difficult.
The mode of external superhigh intensity cold rolling dual phase steel continuous annealing process many employings shrend+tempering, its cooling power can reach 1000-2000 DEG C/s, most domestic steel mill is not also possessed to the condition of high-strength steel special production line, how shrend+tempering is not being adopted even to move back on the basis of line, utilize existing company of the domestic steel mill equipment that moves back to adopt more than rapid cooling+overaging method production 700MPa level to have the superhigh intensity cold rolling dual phase steel of weathering resistance, become the emphasis of Domestic Scientific Research personnel research and development.
CN101376950A discloses " a kind of superhigh intensity cold rolling weather resisting steel plate and manufacture method thereof ".Its chemical composition is: C0.09% ~ 0.16%, Si0.20% ~ 0.60%, Mn1.00% ~ 2.00%, P≤0.030%, S≤0.015%, N≤0.008%, Al0.02% ~ 0.06%, Cu0.20% ~ 0.40%, Cr0.40% ~ 0.60%, Mo0.05% ~ 0.25%, (Nb+Ti) 0.04% ~ 0.08%, other is Fe and inevitable magazine.The steel of this technology, its yield strength 700 ~ 1000MPa, tensile strength 800 ~ 1070MPa, unit elongation 5 ~ 14%.But with the addition of noble metal Mo in its chemical composition, the present invention in contrast, has more cost advantage.
CN101553586A discloses " having formable high strength cold-rolled steel sheet and the manufacture method thereof of excellent weather resistance ".Its chemical composition is: C0.10% ~ 0.20%, Si0.05% ~ 0.25%, Mn1.0% ~ 2.5%, P≤0.020%, S≤0.010%, Al0.02% ~ 0.07%, Nb0.02% ~ 0.08%, Ni0.05% ~ 0.30%, Cu0.1% ~ 0.5%, Cr0.8% ~ 1.5%, Co0.01% ~ 0.10%, and the iron of surplus and other inevitable impurity.Disclosed in the document, technology reheats in 1150 to 1300 DEG C, in the final rolling temperature hot rolling of 750 to 930 DEG C, batches in 400 to 650 DEG C, in (A1 transition point+30 DEG C) to (A3 transition point or following) continuous annealing.The steel yield strength of this technology is maximum at below 500MPa.
CN102011060A discloses " a kind of 700MPa level has cold-rolled steel sheet and the manufacture method thereof of excellent weather resistance ".Its chemical composition is: C0.03% ~ 0.07%, Si≤0.35%, Mn0.1% ~ 1.8%, P≤0.020%, S≤0.010%, Cu0.25% ~ 0.50%, Cr0.25% ~ 0.80%, Ni0.05% ~ 0.30%, Ti0.06% ~ 0.20%, is Fe and inevitable impurity more than other.Technology disclosed in the document makes described steel anneal in bell type annealing furnace in 500 DEG C of temperature ranges to A1 transition point.This technology is only applicable to small serial production, is difficult to meet the demand produced in enormous quantities, and the homogeneity of coil of strip entire volume not easily ensures.
Summary of the invention
The object of the invention is to overcome the problems referred to above and not enough and a kind of superhigh intensity cold rolling dual phase steel and the manufacture method thereof with weathering resistance are provided, this steel plate yield strength can reach more than 700MPa, meets freight container, automobile and other industries to demand that is ultra-thin, ultrahigh-strength steel plates.
The present invention seeks to realize like this:
Have the superhigh intensity cold rolling dual phase steel of weathering resistance, it is characterized in that, (wt.%) meter is as follows by weight percentage for the composition of this steel plate: C:0.10% ~ 0.16%, Si:0.10% ~ 0.50%, Mn:1.4% ~ 2.2%, Cr:0.30% ~ 0.79%, Ni:0.08% ~ 0.20%, Cu:0.20% ~ 0.50%, Nb:0.01% ~ 0.05%, Ti:0.02% ~ 0.05%, Al:0.015% ~ 0.045%, P≤0.020%, S≤0.007%, N≤0.008%, surplus is Fe and inevitable impurity.
Steel plate microtexture is primarily of ferrite+martensite composition, and also may there is a small amount of bainite, by area percentage: ferrite is 57%-70%, martensite is 30%-40%, and bainite is 0-3%.
Present component design reason is as follows:
C is important strengthening element, improves martensitic intensity, affects martensitic content.C content is too low, the Ovshinsky scale of construction during heating of same intercritical annealing temperature in ferrite and austenite two-phase region reduces, and the martensite volume obtained is corresponding minimizing also, is difficult to proof strength, C content is too high is unfavorable for welding property, and in steel of the present invention, C content controls 0.10% ~ 0.16%.
Si is ferrite former, it accelerates carbon to austenitic segregation, ferrite is purified further, Si can expand ferrite, austenite two-phase region simultaneously, the temperature range that critical zone is processed is widened, Si too high levels is unfavorable for weldability and plate surface quality, and in steel of the present invention, Si content controls 0.10% ~ 0.50%.
Mn can improve the hardening capacity of steel, thus reduce two-phase region heating after, in process of cooling obtain martensitic critical cooling velocity.But Mn too high levels, be easy to the martensite banded structure forming high rigidity, unfavorable to homogeneity of structure, in steel of the present invention, Mn content controls 1.4% ~ 2.2%.
Cr improves hardening capacity and the atmospheric corrosion resistance of steel, can cause crevice corrosion, and significantly increase production cost when the amount of Cr is more than 0.80%, and reduce plasticity and toughness, in steel of the present invention, Cr content controls 0.30% ~ 0.80% simultaneously.
Ni improves the hardening capacity of steel, improves the atmospheric corrosion resistance ability of steel, reinstates to improve to be easy to produce hot-short problem containing Cu steel with Cu mono-simultaneously, but it is expensive, and in steel of the present invention, Ni content controls 0.08% ~ 0.20%.
Cu improves hardening capacity and the atmospheric corrosion resistance of steel, when the amount adding copper is less than 0.20%, be difficult to the solidity to corrosion needed for ensureing, when the amount of the copper added is more than 0.50%, may produce grain-boundary crack in the castingprocesses of steel, the surface of hot-rolled sheet also may become coarse.In steel of the present invention, Cu content controls 0.20% ~ 0.50%.
Nb is strong carbonitride-forming elements, tiny carbide and nitride can be formed, suppress growing up of austenite crystal, recrystallization temperature can be improved in the operation of rolling, suppress austenitic recrystallize, keep deformation effects thus fining ferrite grains, and with the form reinforced ferrite matrix of precipitate.In steel of the present invention, Nb content controls 0.01% ~ 0.05%.
The TiN that Ti is highly stable under forming high temperature, reheating in process before hot-work suppresses austenitic grain growth.The too low TiN that can not obtain enough volume fractions of titanium content effectively stops grain coarsening, and titanium content is too high can not play causing thick liquid state to separate out the appearance of TiN the effect stoping grain growth.In steel of the present invention, Ti content controls 0.02% ~ 0.05%.
Al is that deoxidation and crystal grain adjustment add, and can be combined, eliminate the harm of nitrogen with nitrogen, and can crystal grain thinning, and when aluminium adds excessive, the inclusion formed in steel increases and makes the deteriorated workability of steel.In steel of the present invention, Al content controls 0.015% ~ 0.045%.
N is the element existed in smelting process, needs to be controlled the scope certain.Control N≤0.008% in the present invention, is preferably N≤0.006%.
P and S is impurity element in steel, significantly reduces plasticity and toughness and welding property, controls lower P, S and is conducive to improving performance.Control P≤0.020% in steel of the present invention, S≤0.007%.
There is the manufacture method of the superhigh intensity cold rolling dual phase steel of weathering resistance, comprise smelting-continuous casting-heating-hot rolling-cold rolling-continuous annealing-smooth,
(1) pass through smelting according to above-mentioned chemical composition, continuous casting, obtain block;
(2) described block is passed through heating, hot-rolled process, obtained hot-rolled sheet, reheating temperature is more than 1250 DEG C, finish rolling start rolling temperature 1040 DEG C ~ 1100 DEG C, finishing temperature 880 DEG C ~ 930 DEG C, and coiling temperature is 580 DEG C ~ 660 DEG C;
(3) cold rolling draft is 60% ~ 70%;
(4) continuous annealing adopts 750 DEG C ~ 810 DEG C to be incubated 110s ~ 170s, 750 DEG C ~ 810 DEG C insulations, if lower than 750 DEG C, then can not form enough austenites, if temperature is more than 810 DEG C, then can increase due to austenitic volume fraction, in austenite, carbon and alloying element reduce, and the hardening capacity on austenite island declines; And so that 3 DEG C/s ~ 10 DEG C/s speed is jet is cooled to 680 DEG C ~ 710 DEG C, the cooling of this section ensures that austenite low decomposes.Temperature is too low, and cause austenite too much to decompose, temperature is too high, be then unfavorable for plate shape; Then being cooled to 200 DEG C ~ 260 DEG C so that the cooling rate of 40 DEG C/s ~ 60 DEG C/s is jet, in order to ensure austenite fully to martensitic transformation, must cooling rate being strengthened.Temperature is higher than 260 DEG C, and martensite volume is inadequate; Temperature, lower than 200 DEG C, exceeds the capacity of equipment limit; And then being heated to 340 DEG C ~ 400 DEG C tempering 300s ~ 520s, overaging temperature is too low, and martensite island can not be decomposed, and causes yield strength not enough; Overaging temperature is too high, and martensite island is decomposed too much, causes tensile strength to decline too much, can not meet the demands;
(5) carry out smooth through 0.8% ~ 1.4% smooth unit elongation again, smooth is the important procedure of cold rolling production, and Main Function is the yield point elongation eliminating annealed strip.Why the present invention adopts the smooth unit elongation of more than 0.8%, is to make band steel again work hardening occur, and improves yield strength, and exceeds capacity of equipment higher than 1.4%.
The present invention is designed by reasonable component and is equipped with suitable continuous annealing process, under the content of moderate carbon and alloying element, obtain the superhigh intensity cold rolling dual phase steel with weathering resistance, steel plate yield strength reaches more than 700MPa, more than tensile strength 800MPa, the superhigh intensity cold rolling dual phase steel with weathering resistance of unit elongation more than 5%, and there is close grain ferrite and martensite duplex structure, , also may there is a small amount of bainite, by area percentage: ferrite is 57%-70%, martensite is 30%-40%, bainite is 0-3%, ferrite average grain size is 2.2 μm, a certain amount of alloyed cementite is also dispersed with in addition on ferrite matrix.Adopt the continuous annealing mode of air cooling+overaging just can produce, do not need the continuous annealing apparatus with shrend ability, exempt the operation of pickling, surface quality is better, more easily produce, be applicable to the lightweight growth requirement of freight container and automobile and other industries, there is certain application prospect.
Accompanying drawing explanation
Fig. 1 is the micro-organization chart of steel embodiment 2 of the present invention.
Fig. 2 is the precipitated phase of steel embodiment 2 of the present invention.
Fig. 3 is the energy spectrogram of steel embodiment 2 of the present invention.
Embodiment
Below by embodiment, the present invention is further illustrated.
The embodiment of the present invention, according to the component proportion of technical scheme, carries out smelting, continuous casting, rolling, continuous annealing, smooth.The smelting composition of embodiment of the present invention steel is in table 1.The main technologic parameters of embodiment of the present invention steel is in table 2.The performance of embodiment of the present invention steel is in table 3.Embodiment of the present invention steel salt spray corrosion test the results are shown in Table 4.
The smelting composition of table 1 embodiment of the present invention steel, wt%
The main technologic parameters of table 2 embodiment of the present invention steel
The performance of table 3 embodiment of the present invention steel
Table 4 salt spray corrosion test result
As atmospheric exposure test, at 35 DEG C, in 5%NaCl solution, carry out the salt-fog test of 31 days, spray amount 1-2ml/h.The results are shown in Table 4.The atmospheric corrosion resistance of steel of the present invention is obviously better than Q235, is on close level with SPA-H material object.
Claims (4)
1. have the superhigh intensity cold rolling dual phase steel of weathering resistance, it is characterized in that, (wt.%) meter is as follows by weight percentage for the composition of this steel plate: C:0.10% ~ 0.16%, Si:0.10% ~ 0.50%, Mn:1.4% ~ 2.2%, Cr:0.30% ~ 0.79%, Ni:0.08% ~ 0.20%, Cu:0.20% ~ 0.50%, Nb:0.01% ~ 0.05%, Ti:0.02% ~ 0.05%, Al:0.015% ~ 0.045%, P≤0.020%, S≤0.007%, N≤0.008%, surplus is Fe and inevitable impurity.
2. there is the superhigh intensity cold rolling dual phase steel of weathering resistance according to claim 1, it is characterized in that, steel plate microtexture is primarily of ferrite+martensite composition, also may there is a small amount of bainite, by area percentage: ferrite is 57%-70%, martensite is 30%-40%, and bainite is 0-3%.
3. the superhigh intensity cold rolling dual phase steel with weathering resistance as described in claim 1 or 2, it is characterized in that, described steel plate, its yield strength is more than 700MPa, tensile strength is more than 800MPa, unit elongation A
50mmbe more than 5%.
4. the manufacture method with the superhigh intensity cold rolling dual phase steel of weathering resistance as described in as arbitrary in claims 1 to 3, comprises smelting-continuous casting-heating-hot rolling-cold rolling-continuous annealing-smooth, it is characterized in that:
(1) pass through smelting according to above-mentioned chemical composition, continuous casting, obtain block;
(2) described block is passed through heating, hot-rolled process, obtained hot-rolled sheet, reheating temperature is more than 1250 DEG C, finish rolling start rolling temperature 1040 DEG C ~ 1100 DEG C, finishing temperature 880 DEG C ~ 930 DEG C, and coiling temperature is 580 DEG C ~ 660 DEG C;
(3) cold rolling draft is 60% ~ 70%;
(4) continuous annealing adopts 750 DEG C ~ 810 DEG C to be incubated 110s ~ 170s, and so that 3 DEG C/s ~ 10 DEG C/s speed is jet is cooled to 680 DEG C ~ 710 DEG C, then be cooled to 200 DEG C ~ 260 DEG C so that the cooling rate of 40 DEG C/s ~ 60 DEG C/s is jet, and then be heated to 340 DEG C ~ 400 DEG C tempering 300s ~ 520s;
(5) smooth unit elongation is 0.8% ~ 1.4%.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348885A (en) * | 2008-09-11 | 2009-01-21 | 北京科技大学 | 1000MPa grade cold rolling hot dip galvanizing two-phase steel and manufacturing method thereof |
| CN101558178A (en) * | 2006-12-12 | 2009-10-14 | Posco公司 | Cold-rolled steel sheet with high yield ratio and excellent weather resistance |
| CN102021483A (en) * | 2010-12-06 | 2011-04-20 | 北京科技大学 | Cold-rolled dual-phase steel plate with 1,200 MPa-level tensile strength and preparation method thereof |
| CN102839329A (en) * | 2012-08-06 | 2012-12-26 | 马钢(集团)控股有限公司 | Cold-rolling double-phase-steel steel plate with tensile strength of 450 MPa, and preparation method thereof |
| CN103060703A (en) * | 2013-01-22 | 2013-04-24 | 宝山钢铁股份有限公司 | 780MPa grade cold rolling biphase strip steel and manufacturing method thereof |
-
2013
- 2013-09-05 CN CN201310398861.5A patent/CN104419878B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101558178A (en) * | 2006-12-12 | 2009-10-14 | Posco公司 | Cold-rolled steel sheet with high yield ratio and excellent weather resistance |
| CN101348885A (en) * | 2008-09-11 | 2009-01-21 | 北京科技大学 | 1000MPa grade cold rolling hot dip galvanizing two-phase steel and manufacturing method thereof |
| CN102021483A (en) * | 2010-12-06 | 2011-04-20 | 北京科技大学 | Cold-rolled dual-phase steel plate with 1,200 MPa-level tensile strength and preparation method thereof |
| CN102839329A (en) * | 2012-08-06 | 2012-12-26 | 马钢(集团)控股有限公司 | Cold-rolling double-phase-steel steel plate with tensile strength of 450 MPa, and preparation method thereof |
| CN103060703A (en) * | 2013-01-22 | 2013-04-24 | 宝山钢铁股份有限公司 | 780MPa grade cold rolling biphase strip steel and manufacturing method thereof |
Cited By (24)
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| CN105568145A (en) * | 2015-12-24 | 2016-05-11 | 北京科技大学 | Cold-rolled ultrahigh-strength biphase steel plate for vehicle with corrosion resistance and preparation method thereof |
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| CN114381580B (en) * | 2020-10-19 | 2023-12-12 | 宝山钢铁股份有限公司 | Cover annealing process and manufacturing method of high corrosion-resistant weather-resistant steel |
| CN113122783A (en) * | 2021-04-23 | 2021-07-16 | 唐山全丰薄板有限公司 | 1300 MPa-grade ultrahigh-strength cold-rolled steel plate for automobiles and manufacturing method thereof |
| CN115852245A (en) * | 2021-09-27 | 2023-03-28 | 宝山钢铁股份有限公司 | Cold-rolled bainite weathering steel and preparation method thereof |
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