CN106987772B - High-strength fireproof weathering steel and its production method - Google Patents
High-strength fireproof weathering steel and its production method Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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Abstract
The present invention provides a kind of high-strength fireproof weathering steel, its chemical component includes C, Si, Mn, P, S, Mo, W, Cr, Cu, Ni, Nb, V, Als, Ca, Re, remaining is Fe and inevitable impurity.Fire-resistant and weather-resistant steel of the invention has excellent comprehensive mechanical property, and metallurgical quality is excellent, has high intensity, excellent fire resisting, weather-proof, cold-forming property and anti-large deformation ability using the steel that present component and method produce.Manufacturing method is simple simultaneously, and production cost is low, is easy to be mass produced.
Description
Technical field
The present invention relates to steel field of smelting, in particular to a kind of high-strength fireproof weathering steel and its production method.
Background technique
With being constantly progressive for metallurgical science and technology, the large scale structures such as building, bridge engineering is also more next to the technical requirements of steel
It is higher, other than there is high requirement to indexs such as traditional intensity, toughness, plasticity, also to the fire resisting of steel, weather-proof, antidetonation
More stringent requirements are proposed for performance, welding performance and thickness directional properties.And fire-resistant and weather-resistant steel can make up normal steel structure
The disadvantage of fire-resistance weather resistance difference greatly reduces fireproof coating and weathering resistance coatings, reduces environmental pollution, improves resource and energy benefit
With efficiency, meet state policies and principles requirement.Therefore, in the long run, structure is building structure industry tool with fire-resistant and weather-resistant steel
There is the high-quality steel of huge potential demand, market value is inestimable.Structure has been included in " 13 with fire-resistant and weather-resistant steel at present
Five " science and technology supporting projects, at the same it is external in skyscraper floor support plate largely using fire-resistant and weather-resistant steel plate, and the country there is no and grind
Hair and application report.
In the prior art, it is resistance to that the Chinese invention patent that number of patent application is CN01133562.9 discloses a kind of high-performance
Fiery weather-resisting building steel and its production method, the invention steel contain more P content, cause welding performance poor, and steel plate need to be into
Row normalizing+tempering, process route is complicated, higher cost, while the intensity rank of steel plate is lower.In addition, number of patent application
For CN20091027241.9, CN201410073270.5, CN201410236553.7, CN201510110519.X,
CN201110247625.0、CN200910045146.7、CN200810197847.8、CN201110080774.6、
The Chinese invention patent of CN201310714605.2 all refers to the production of steel, and obtained steel product all has good fire resisting
Performance, but the disadvantage is that do not have weather resistance.Number of patent application is that the Chinese invention patent of CN200680015185.7 discloses
A kind of heat-resistant steel product and its manufacturing method, the steel must contain more Cu, Ni element, and cost of alloy is high, be unfavorable in each smelting
Golden industry promotes production.
Summary of the invention
The object of the present invention is to provide a kind of high-strength fireproof weathering steel, it not only has high intensity, but also fire resisting, resistance to
Time, cold-forming property and anti-large deformation ability are outstanding.
To achieve the above object, the present invention provides a kind of high-strength fireproof weathering steel, its chemical component presses quality percentage
Number is calculated as：C：0.012~0.046%, Si：0.10~0.20%, Mn：0.60~1.10%, P≤0.005%, S≤
0.002%, Mo：0.12~0.41%, W：0.15~0.32%, Cr：0.61~0.81%, Cu：0.18~0.48%, Ni：
0.28~0.45%, Nb：0.008~0.026%, V：0.041~0.072%, Als：0.015~0.025%, Ca：0.0012
~0.0025%, Re：0.0010~0.0041%, remaining is Fe and inevitable impurity.
Further, in the chemical component of the high-strength fireproof weathering steel, (Mo+3W)：0.86~1.08%.
Further, in the chemical component of the high-strength fireproof weathering steel, (Cr+2Cu)/Ni：3.41~3.86%.
Further, in the chemical component of the high-strength fireproof weathering steel, cold cracking Sensitivity Index Pcm=C+Si/30+
(Mn+Cr+Cu)/20+Ni/60+Mo/15+V/10+5B≤0.18%.
In the present invention described below the reasons why chemical component limited amount：
C content selection of the present invention improves the strong of steel by gap displacement solution strengthening in 0.012~0.046%, C strongly
Degree, is to ensure that one of important element of hardness of steel.Appropriate C forms tiny precipitation with alloying elements such as Nb, V, Mo in steel simultaneously
Phase, it is strong to improve steel room temperature intensity and elevated temperature strength, improve the plasticity and toughness of steel.Excessively high tendency, the M- that will increase carbon segregation of C content
The island A volume fraction content and welding cold crack sensitivity coefficient influence the cold and hot working of steel to deteriorate the comprehensive performance of steel
Performance.The transformation temperature that steel will be promoted when C content is too low is unfavorable for the implementation of rolling mill practice, and deteriorates the comprehensive performance of steel.Therefore
C content is limited to 0.012~0.046%.
Si content selection of the present invention is solution strengthening and deoxidation in main function of 0.10~0.20%, the Si in steel.By
The element that Ca, Als etc. have stronger binding force with [O] is added in steel of the present invention, therefore, that adds in steel of the present invention is a small amount of
Si primarily serves solution strengthening effect, it is ensured that the strength level of steel.
Mn content selection of the present invention is thinning microstructure in 0.60~1.10%, Mn and ensures that steel obdurability is indispensable
Important element.But Mn easily forms coarse MnS field trash with S, adversely affects height to the plasticity and toughness of steel.Therefore Mn content limits
It is set to 0.60~1.10%.
P≤0.005% of the present invention, S≤0.002%, P, S are the objectionable impurities elements in steel.Although P can improve the resistance to of steel
Corrosion energy, but high P easily leads to segregation, influences the structural homogenity of steel, reduces the toughness of steel；And S and Mn easily form coarse MnS
It is mingled with, it is very unfavorable to plasticity and toughness.
It is mainly solution strengthening effect that Mo content of the present invention, which is selected in effect of 0.12~0.41%, the Mo in steel, same with this
When, Mo can also be precipitated in the form of tiny carbide in conjunction with C, while improving steel room temperature intensity, can also be mentioned significantly
The elevated temperature strength of Gao Gang.Appropriate Mo can also promote the tiny carboritride analysis of Nb, V at high temperature with higher stability
Out, to improve the high-temperature behavior of steel.But in steel containing higher Mo easily lead to a large amount of martensitic structures in cooling procedure out
It is existing, deteriorate the plasticity and toughness of steel.Therefore Mo content is limited to 0.12~0.41%.
W content of the present invention is selected in 0.15~0.32%, and W, which is largely solid-solution in matrix, in steel plays solution strengthening effect,
Equally, a small amount of W is precipitated in the form of tiny carbide in conjunction with C, improves the elevated temperature strength of steel, but higher W content is unfavorable
In the plasticity and toughness for improving steel.
Cr content of the present invention is selected in 0.61~0.81%, Cr with very strong solution strengthening effect, is to effectively improve steel plate
One of element of intensity.In the case where Cr and the compound addition of Ni, Cu, the corrosion resistance of steel is significantly improved.
Cu content of the present invention is selected in 0.18~0.48%, and in the present invention, the main function of Cu is strong in addition to playing solid solution and precipitating
Change effect, moreover it is possible to the corrosion resistance significantly improved.In the case where with the compound addition of Ni, Cr, corrosion resistance is improved
Effect is more significant.But when Cu content is lower than 0.18%, precipitation enhancement is unobvious, and corrosion resisting property cannot be guaranteed,
When Cu content is more than 0.48%, hot-short phenomenon can be caused when heated, cause surface quality problems.
Ni content selection of the present invention contributes less steel strength in 0.28~0.45%, Ni, but can be obviously improved steel
Plasticity and toughness.Steel especially high to the solution strengthening elements content such as Cu, Cr, appropriate Ni can be effectively improved the cold working of steel
Performance.In the case where Ni and the compound addition of Cr, Cu, it is also remarkably improved weather resistance.But Ni amount is excessively high, and surface of steel plate easily produces
Life is largely difficult to the iron scale to fall off, and greatly increases production cost.
Nb content selection of the present invention is a kind of carbide in 0.008~0.026%, Nb, is had strongly
Grain refinement can significantly improve austenite recrystallization temperature, expand rolling mill practice range, make invention steel in II stage rolling
Abundant thinning microstructure in the process, it is ensured that steel are matched with good obdurability.During the rolling process, the carbon that Nb is formed in steel
Growing up for austenite grain can be effectively suppressed in nitride particles, improves intensity and plasticity and toughness.In the present invention, it is added simultaneously with Mo
The tiny carboritride that Nb, V can be significantly improved is precipitated, these carbide stability with higher at high temperature, to mention
The fire resistance of Gao Gang.When Nb content is lower than 0.008%, the tiny carboritride that Nb is precipitated is insufficient, is unable to ensure fire resisting
Performance, and cause intensity insufficient.
V selection of the present invention is a kind of considerably more intense carbide former in 0.041~0.072%, V, suitable V tool
There is apparent precipitation hardening to act on, also have the function of solution strengthening effect and reduces yield tensile ratio.As Nb and the compound addition of V
When, it can obviously improve the generation of transversal crack phenomenon, significantly improve the recrystallization temperature of steel.In the present invention, it is added simultaneously with Mo
The tiny carboritride that Nb, V can be significantly improved is precipitated, these carbide stability with higher at high temperature, to mention
The fire resistance of Gao Gang.But V content is excessively high, and precipitation enhancement is significant, but plasticity and toughness are deteriorated.
Als content selection of the present invention is added in steel in 0.015~0.025%, Als often as deoxidant element.Als and steel
Middle N is combined and is formed AlN particle, plays Grain refinement.
Ca content control of the present invention is 0.0012~0.0025%.Ca is a critically important element in product of the present invention,
Suitable Ca is added in steel by Sulfide inclusion nodularization, is conducive to improve plasticity and toughness.Ca in the present invention important function be with
Als and [O], which are combined, forms fine oxide particle, forming core core of these fine oxide particles as Mn sulfide, carefully
Change sulfide size, improve plasticity and toughness, therefore, Ca content should be not less than 0.0012%；When Ca content is more than 0.0025%, then can
It forms many large-scale sulfide mixing containing Ca to be mingled with, is unfavorable for improving the comprehensive mechanical property of steel.
Re content control of the present invention is 0.0010~0.0050%.Re is a critically important element in product of the present invention,
In addition to purifying steel, the corrosion resisting property of steel can also be significantly improved.When Re content is lower than 0.0010%, purifies steel and mention
The effect of high corrosion resistance cannot embody, and when the content of Re is more than 0.0050%, then it is multiple will form the high large scale of Re content
Co-clip sundries.
It is insufficient in addition to causing hardness of steel as Mo+3W < 0.86 meanwhile as a preferred technical solution, in steel of the present invention
Outside, the fire resistance that also not can guarantee steel, as Mo+3W > 1.08, plasticity and toughness and the cold-forming property that will cause steel are poor, close
Golden cost is also higher；As (Cr+2Cu)/Ni < 3.41, other than causing intensity insufficient, the fire resistance and corrosion resisting property of steel
Also it is unable to get guarantee, as (Cr+2Cu)/Ni > 3.86, then will lead to plasticity and toughness and the cold-forming property decline of steel, alloy
Cost also greatly increases；For the plasticity and toughness and cold-forming property for ensuring steel, Pcm value is necessarily less than equal to 0.18%.
In addition to containing above-mentioned chemical component, surplus is Fe and is inevitably mingled with steel of the present invention.
It is a further object to provide the production method of above-mentioned high-strength fireproof weathering steel, this method step letters
It is single, at low cost, it is suitable for industrialized production.
To achieve the above object, the present invention provides a kind of production method of above-mentioned high-strength fireproof weathering steel, it is successively wrapped
Include following steps：Continuous casting, slab heating, hot continuous rolling, sour cold rolling, continuous annealing, wherein：
1) in the slab heating period, slab is heated to 1280~1320 DEG C of temperature, heating time is 150~
220min；
2) in the hot continuous rolling stage, roughing outlet temperature is 1080~1200 DEG C, and finish rolling finishing temperature is 860~900
DEG C, coiling temperature is 680~720 DEG C；
3) in the sour cold rolling stage, acid value is 195~205g/L, and pickling temperature is 70~90 DEG C, cold rolling total reduction
It is 55~70%；
4) in the continuous annealing stage, soaking temperature is 770~800 DEG C, and it is 660~680 DEG C that slow cooling section, which terminates temperature,
Rapid cooling section terminates 410~430 DEG C of temperature, then slow cooling is to room temperature, 170~220m/min of process section strip speed.
Further, in the slab heating period, the slab temperature difference≤30 DEG C are controlled.It can preferably guarantee that de-scaling is imitated
Fruit.
Further, in the hot continuous rolling stage, roughing passage is 3~5 times, and finish rolling collector opens 2~3 groups of number, same to plate
The temperature difference≤25 DEG C.
Further, carried out after the continuous annealing it is smooth, smooth elongation percentage be 1.3~1.5%.
The beneficial effects of the present invention are：
The present invention by controlling the degree of each chemical component, obtain it is a kind of not only there is high intensity, but also fire resisting,
Weather-proof, cold-forming property and the outstanding fire-resistant and weather-resistant steel of anti-large deformation ability, at the same it is at low cost.The fire-resistant and weather-resistant steel can be with
The disadvantage for making up normal steel structure fire-resistance weather resistance difference greatly reduces fireproof coating and weathering resistance coatings, reduces environmental pollution, mentions
High resource and efficiency of energy utilization.Meanwhile the present invention can pass through conventional simple procedures by the control of production technology
Production obtains fire-resistant and weather-resistant steel of the invention, and production cost is low, is easy to be mass produced, and is suitble to carry out industry in each smelter
Change and promote and apply, there is very strong practicability.
Specific embodiment
High-strength fireproof weathering steel of the invention and its production method are made further below by way of specific embodiment
It is bright：
The weight percent that table 1 lists the chemical component of the high-strength fireproof weathering steel of 1~embodiment of embodiment 9 is (remaining
Amount is Fe and inevitable impurity).
The chemical component (wt, %) of 1 embodiment of table
According to steel chemical composition of the present invention and production method requirement, smelts and rolled 9 batches of steel of the invention, respectively in fact
1~embodiment of example 9 is applied, the steel of Examples 1 to 3 is with a thickness of 0.8mm, and the steel of embodiment 4~6 is with a thickness of 1.0mm, embodiment 7~9
Steel with a thickness of 1.2mm.
The production method of the high-strength fireproof weathering steel of the embodiment of the present invention 1~9, successively includes the following steps：Continuous casting, casting
Base heating, hot continuous rolling, sour cold rolling, continuous annealing.
1) in the slab heating period, slab is heated to 1280~1320 DEG C of temperature, heating time is 150~
220min controls the slab temperature difference≤30 DEG C.
2) in the hot continuous rolling stage, control roughing outlet temperature be 1080~1200 DEG C, finish rolling finishing temperature be 860~
900 DEG C, coiling temperature is 680~720 DEG C.Roughing passage is 3~5 times, and finish rolling collector opens 2~3 groups of number, guarantees de-scaling effect
Fruit controls with the plate temperature difference≤25 DEG C.
3) in the sour cold rolling stage, acid value is 195~205g/L, and pickling temperature is 70~90 DEG C, cold rolling total reduction
It is 55~70%.
4) in the continuous annealing stage, soaking temperature is 770~800 DEG C, and it is 660~680 DEG C that slow cooling section, which terminates temperature,
Rapid cooling section terminates 410~430 DEG C of temperature, then slow cooling is to room temperature, 170~220m/min of process section strip speed.It is described continuously to move back
Carried out after fire it is smooth, smooth elongation percentage be 1.3~1.5%.
Mechanical property test is carried out to the steel of above-described embodiment 1~9, the results are shown in Table 2：
The mechanical property of the steel of the present invention of table 2
(note：Steel fire resistance of the present invention is with yield strength R at 600 DEG CP0.2It is commented not less than the 2/3 of room-temperature yield strength
Fixed, high temperature tension test is provided to execute by GB/T4338；Weather resistance is commented by the mass loss after week leaching corrosion test 264h
Fixed, week leaching test is provided to execute by GB/T19746, specific corrosion test testing liquid：1.0×10-2mol/L NaHSO3；Supply
Solution：2.0×10-2mol/L NaHSO3；Test temperature：45±2℃；Relative humidity：70 ± 5%；Week leaching wheel speed：1 circle/60
Minute.)
From table 2 it can be seen that fire-resistant and weather-resistant steel of the invention has excellent comprehensive mechanical property, metallurgical quality is excellent,
Have high intensity, excellent fire resisting, weather-proof, cold-forming property and anti-big change using the steel that present component and method produce
Shape ability.Manufacturing method is simple simultaneously, and production cost is low, is easy to be mass produced.
The scientific research personnel of technical field can according to the above-mentioned change for making content and form unsubstantiality without departing from
Institute's essential scope of the present invention, therefore, the present invention is not limited to above-mentioned specific embodiment.
Claims (6)
1. a kind of high-strength fireproof weathering steel, it is characterised in that：Its chemical component is by mass percentage：C：0.012~
0.046%, Si：0.10~0.20%, Mn：0.60~1.10%, P≤0.005%, S≤0.002%, Mo：0.12~
0.41%, W：0.15~0.32%, Cr：0.61~0.81%, Cu：0.18~0.48%, Ni：0.28~0.45%, Nb：
0.008~0.026%, V：0.041~0.072%, Als：0.015~0.025%, Ca：0.0012~0.0025%, Re：
0.0010~0.0041%, remaining is Fe and inevitable impurity；
In the chemical component of the high-strength fireproof weathering steel, (Mo+3W)：0.86~1.08%, (Cr+2Cu)/Ni：3.41~
3.86%.
2. high-strength fireproof weathering steel according to claim 1, it is characterised in that：The change of the high-strength fireproof weathering steel
In studying point, cold cracking Sensitivity Index Pcm=C+Si/30+ (Mn+Cr+Cu)/20+Ni/60+Mo/15+V/10+5B≤0.18%.
3. the production method of high-strength fireproof weathering steel described in a kind of claim 1, it successively includes the following steps：Continuous casting, casting
Base heating, hot continuous rolling, sour cold rolling, continuous annealing, it is characterised in that：
1) in the slab heating period, slab is heated to 1280~1320 DEG C of temperature, heating time is 150~220min；
2) in the hot continuous rolling stage, roughing outlet temperature is 1080~1200 DEG C, and finish rolling finishing temperature is 860~900 DEG C, volume
Taking temperature is 680~720 DEG C；
3) in the sour cold rolling stage, acid value is 195~205g/L, and pickling temperature is 70~90 DEG C, and cold rolling total reduction is 55
~70%；
4) in the continuous annealing stage, soaking temperature is 770~800 DEG C, and it is 660~680 DEG C that slow cooling section, which terminates temperature, rapid cooling
Section terminates 410~430 DEG C of temperature, then slow cooling is to room temperature, 170~220m/min of process section strip speed.
4. the production method of high-strength fireproof weathering steel according to claim 3, it is characterised in that：The slab heats rank
Duan Zhong controls the slab temperature difference≤30 DEG C.
5. the production method of high-strength fireproof weathering steel according to claim 3, it is characterised in that：The hot continuous rolling stage
In, roughing passage is 3~5 times, and finish rolling collector opens 2~3 groups of number, with the plate temperature difference≤25 DEG C.
6. the production method of high-strength fireproof weathering steel according to claim 3, it is characterised in that：After the continuous annealing
Carry out it is smooth, smooth elongation percentage be 1.3~1.5%.
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|---|---|---|---|---|
| CN100392135C (en) * | 2005-06-30 | 2008-06-04 | 宝山钢铁股份有限公司 | Ultra-high strength strip steel and its production process |
| JP4495060B2 (en) * | 2005-10-13 | 2010-06-30 | 新日本製鐵株式会社 | Welded joints for refractory structures with excellent high-temperature strength and toughness |
| JP5633594B2 (en) * | 2013-04-02 | 2014-12-03 | Ｊｆｅスチール株式会社 | Cold-rolled steel sheet excellent in punchability and heat-strain resistance and method for producing the same |
| CN103882292B (en) * | 2014-03-05 | 2016-03-30 | 首钢总公司 | A kind of cold rolling structural carbon steel production method |
| CN103938101B (en) * | 2014-04-10 | 2016-08-31 | 马钢(集团)控股有限公司 | A kind of steel plate and preparation method thereof |
| CN105063510B (en) * | 2015-08-11 | 2017-05-10 | 东北大学 | High-plasticity 700 MPa cold-rolled weather-proof dual-phase steel and preparation method thereof |
| CN105937011B (en) * | 2016-07-11 | 2018-05-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Low yield strength cold rolling high strength steel plate and preparation method thereof |
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