CN102534409A - Anti-wrinkle ferritic stainless steel with low cost and production method thereof - Google Patents
Anti-wrinkle ferritic stainless steel with low cost and production method thereof Download PDFInfo
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Abstract
The invention relates to an anti-wrinkle ferritic stainless steel with low cost and a production method thereof, belonging to the field of stainless steel products and manufacture thereof. The anti-wrinkle ferritic stainless steel comprises the following chemical components by percent: 0.02-0.06 percent of C, 0.20-0.60 percent of Si, 0.20-0.80 percent of Mn, 16-18 percent of Cr, at most 0.025 percent of P, at most 0.015 percent of S, at most 0.75 percent of Ni, 0.020-0.030 percent of Als, at most 0.025 percent of N and the balance of Fe and inevitable impurities. A continuous casting process adopts a continuous-casting sheet billet with thickness of 75-90mm and dynamic liquid core soft-reduction technology so as to break columnar crystals, expand the proportion of as-cast equiaxial crystals and refine an as-cast structure. The component segregation caused by the columnar crystals during casting blank solidification is reduced, the characteristic that the reduction of single pass of the continuous casting and rolling production line of the sheet billet is large is combined, the perfect recrystallization of strip steel in the hot rolling process is ensured, and a hot-rolled state of structure is a polygonal equiaxial grain. An annealing procedure after hot rolling is not needed, the strip steel carries out direct acid washing for cold rolling, therefore the production cost is greatly reduced, and the strip steel has a good anti-wrinkle performance.
Description
Technical field
The present invention relates to crease-resistant ferritic stainless steel of a kind of low cost and working method thereof, belong to stainless steel product and manufacturing field thereof.
Background technology
Ferritic stainless steel is to contain the Cr amount between 11%～30%, is to be main stainless steel with the ferritic under user mode.Ferritic stainless steel is not because nickeliferous in the matrix; Price is relatively cheap; Have the anti-chloride stress cracking corrosive nature better again than austenitic stainless steel; Also have good sea water resistance local corrosion performance and high temperature oxidation resistance, so be widely used in aspects such as galley equipment, household electrical appliance, automobile, building decoration.But ferritic stainless steel cold shaping performance is often unsatisfactory, is that its cold shaping performance is poor on the one hand, and easy of crack causes waste product in punching course; Through regular meeting a kind of corrugated defective that is referred to as fold appears at its finished surface on the other hand.Fold has not only been destroyed the outward appearance of molded component, and needs to increase grinding and polishing operation, is difficult to eliminate even occur fracture phenomena when serious.The reason that produces for fold mainly contains following two kinds: a kind of reason is along rolling to some the special texture that distributes in heat, cold working process; In strain path; Because the anisotropy of viscous deformation causes fold thereby produce the strain difference in the sheet metal thickness direction; Another kind of reason is the ferritic stainless steel component segregation that column crystal causes when casting blank solidification, cause in subsequently hot-work and heat treatment process, being difficult to eliminate fully, and along with the increase of amount of finish, rolls to being linear distribution on the edge.This because the segregation of composition causes the inhomogeneous of material viscous deformation, thus fold produced.Background technology has proposed a lot of methods to improve the processing characteristics of ferritic stainless steel; One Chinese patent application CN01136913 provides a kind of processing characteristics improved ferrite stainless steel; Utilized the precipitate that contains Nb control action kou, cryogenicly in before the material final annealing, having carried out separated out processing crystalline orientation; CN200410046247 has announced interpolation Nb, Ti element, through carrying out that twice annealing control is dispersed in that sedimentary particle size and distribution in the steel matrix are improved its dimensional precision and in the post forming performance of press forming state cold rolling.These two patents unavoidably will have influence on the surface quality of cold drawing owing in material, added Nb, Ti element.CN101008043B has proposed a kind of working method of improved ferritic stainless steel; Adopting slab thickness is the heavy slab flow process of 200mm; Mainly be to control,, increased intermediate table between roughing and the finish rolling in order to guarantee fully carrying out of recrystallize from hot-rolled temperature and draft; This just need transform existing strip production line, therefore is difficult to promote aborning.At present, what the production of ferritic stainless steel was adopted usually all is heavy slab flow processs, to adopting continuous-casting sheet billet to produce ferritic stainless steel play-by-play is arranged seldom.Therefore, press for and propose a kind ofly to have the working method of the ferritic stainless steel of good wrinkle resistance, and can omit the annealing operation after the hot rolling, thereby reduce production costs greatly in bar strip continuous casting and rolling flow path production.
Summary of the invention
The object of the invention provides crease-resistant ferritic stainless steel of a kind of low cost and working method thereof; In the production process of ferrite stainless steel band; Adopt chemical ingredients and the continuous-casting sheet billet optimized; In conjunction with the CSP new technology, obtain the ferritic stainless steel that wrinkle resistance is excellent, manufacturing cost is low, solve the problems referred to above that background technology exists.
Technical scheme of the present invention is:
The crease-resistant ferritic stainless steel of a kind of low cost, its chemical ingredients is following according to the weight percent proportioning: C:0.02～0.06%, Si:0.20～0.60%; Mn:0.20～0.80%, Cr:16～18%, P :≤0.025%; S :≤0.015%; Ni≤0.75%, Als:0.020～0.030%, N≤0.025% surplus is Fe and inevitable impurity.
The working method of the crease-resistant ferritic stainless steel of a kind of low cost comprises converter smelting, external refining, continuous casting, hot rolling, cold rolling, cold coiling annealing operation, and converter smelting, external refining Working Procedure Controlling chemical ingredients are following according to the weight percent proportioning: C:0.02～0.06%; Si:0.20～0.60%; Mn:0.20～0.80%, Cr:16～18%, P :≤0.025%; S :≤0.015%; Ni≤0.75%, Als:0.020～0.030%, N≤0.025% surplus is Fe and inevitable impurity; Said continuous casting working procedure adopts sheet blank continuous casting, and molten steel temperature in tundish is in the sheet blank continuous casting operation: 1525～1565 ℃, the pulling rate of strand is 3.5～5.0m/min, and going out the mold slab thickness is 75～90mm; Continuous casting adopts the soft technology of depressing of dynamic fluid flow core, and soft draught is 5～25mm, to eliminate component segregation and to smash column crystal, enlarges the ratio and the thinning solidification structure of as cast condition equiax crystal; Proportion of equiaxed grain in the continuously cast bloom solidified structure>=60%.
Slab heating temperature is 1050～1150 ℃ in the said hot-rolled process, and the roughing final temperature is controlled at 1000～1100 ℃, and roughing is two rolling mill tandem rollings, and the single pass draft is not less than 40%; The intermediate blank that roughing is come out gets into finishing train through intermediate table; Finish rolling is five to seven rolling mill tandem rollings, and the finish rolling temperature in is controlled at 900～1050 ℃, and the finish rolling final temperature is controlled at 800～950 ℃; Finish rolling outlet single pass draught is greater than 20%, and coiling temperature is controlled at 660～760 ℃.The hot-rolled sheet coil that adopts above-mentioned continuous casting process and hot rolling technology to produce, its hot rolling attitude is organized as polygonal equi-axed crystal, does not need the annealing operation after the hot rolling, directly pickling, cooling rolls.
Said cold rolling, cold coiling annealing operation, stainless steel hot-rolling coiled sheet to obtaining to adopt once cold rolling or twice cold-rolling practice between the cold rolling production board, add up cold rolling draft >=75% from hot-rolled sheet after pickling; Cold rolled strip carries out continuous annealing after pickling handles, and annealing temperature is controlled at 850～900 ℃.
The crease-resistant ferritic stainless steel of low cost of the present invention according to the physical metallurgy characteristics of CSP, provides the chemical ingredients prescription of the crease-resistant ferritic stainless steel of optimizing.The function analysis of principal element is following in the prescription:
Carbon: carbide forming element and austenite former, can improve the intensity of steel, but can make the decrease ductility of steel, thereby reduce the forming property of steel greatly.The present invention chooses 0.02～0.06%.
Manganese: austenite former, mainly play solution strengthening.But when its content is too much, have high temperature austenite in the steel, cooling rate control is unreasonable can to form residual austenite, makes the matrix of steel inhomogeneous, reduces the forming property of steel.Therefore the present invention chooses 0.20～0.80%.
Silicon: ferrite former, can increase the iron element and organize ratio, the tensile strength and the less degree that can significantly improve steel improve ys, but reduce toughness, the plasticity of steel simultaneously to a certain extent.The present invention chooses 0.20～0.60%.
Chromium: the alloying element that makes ferritic stainless steel have ferritic structure and have good corrosion resistance.The rustless property of ferritic stainless steel and the acquisition of erosion resistance are because under the medium effect, chromium has promoted the passivation of steel and made steel keep stablizing passive result.Chromium rank ferritic stainless steel in the invention belongs to, chromium remains on 16～18%.
Nickel: can improve the intensity and the toughness of ferritic stainless steel, and the brittle transition temperature of steel is reduced, can also further improve the corrosion resistance nature of steel simultaneously, and useful to the cold shaping performance.The present invention chooses Ni≤0.75%.
Nitrogen: the element that improves the strength of materials; Because the solubleness of nitrogen in ferritic stainless steel is low; Have carbon in the subsequent cooling process after heat, nitride is separated out; Cause the reduction of ferritic stainless steel toughness, brittle transition temperature to raise, and the intergranular corrosion susceptibility of ferritic stainless steel is increased.The present invention controls N≤0.05%.
Aluminium: utilize Al fix N element, aluminium and nitrogen can form disperse, tiny AlN particle when sheet blank continuous casting, and the tiny particle of these disperses can hinder growing up of in heating and rolling deformation process crystal grain, thereby makes crystal grain fined.The present invention chooses 0.020～0.030%.
The working method of the low-cost crease-resistant ferritic stainless steel of the present invention, what its special feature adopted is bar strip continuous casting and rolling flow path, rather than traditional heavy slab (slab thickness is greater than 150mm) flow process.As far as ferritic stainless steel, the form of the generation of fold and its strand crystal structure and position reduce the column crystal ratio to much relations are arranged, and increase the generation that the strand proportion of equiaxed grain can significantly alleviate or avoid cold drawing fold.In addition, when sheet blank continuous casting, Al in the steel and N can form the tiny AlN particle of disperse, and tiny AlN particle can hinder growing up of crystal grain; Because the setting rate of thin slab and speed of cooling are fast more a lot of than heavy slab, cause the size of non-metallic inclusion such as oxide compound, sulfide in the thin slab to reach nano level simultaneously, these nano level precipitates also have pinning effect to growing up of as cast condition crystal grain.Therefore, the as-cast structure of thin slab is much more tiny, even than heavy slab, and this all is that final ferritic stainless steel has good wrinkle resistance and lays a good foundation.When sheet blank continuous casting, must adopt the soft technology liquid center cast rolling technology depressed of dynamic fluid flow core, its essence is sticky district (two-phase region) in, to process, and depresses the terminal point that solidifies of process dynamic tracking strand, before final depressing position being remained at solidify terminal point.It is 75～90mm that strand goes out mold thickness, and soft draught is 5～25mm.This can make the inner column crystal of strand broken, becomes the core that equiax crystal solidifies, and enlarges markedly proportion of equiaxed grain, helps eliminating component segregation and center porosity, thereby makes proportion of equiaxed grain in the continuously cast bloom solidified structure >=60%.
Hot-rolled process is two roughing and five to seven finish rolling; Insulation (cooling) section is arranged between roughing and the finish rolling, guarantee complete dynamic recrystallization takes place in the roughing process, make as cast condition crystal grain fined; For guaranteeing in the roughing process perfect recrystallization to take place; The roughing final temperature is controlled at 1000～1100 ℃, increases the single pass draft, and the single pass draft is not less than 40%; The intermediate blank that roughing is come out gets into finishing train through intermediate table, and the finish rolling temperature in is controlled at 900～1050 ℃, and the finish rolling final temperature is controlled at 800～950 ℃, and finish rolling outlet single pass draught is greater than 20%, and coiling temperature is controlled at 660～760 ℃.Emphasis guarantees that last reduction in pass of finish rolling and finishing temperature will satisfy the condition of band steel recrystallize in the finish rolling process.In the working method of the present invention, at first under the condition of guaranteeing as cast condition proportion of equiaxed grain >=60%, the hot-rolled sheet coil that adopts above-mentioned hot rolling technology to produce, its hot rolling attitude is organized as polygonal equi-axed crystal, does not need the annealing operation after the hot rolling, directly pickling, cooling rolls.So not only can reduce one annealing operation, reduce production costs greatly, and can avoid the ferritic stainless steel product surface wrinkling striped to occur.Follow-up cold rolling, annealing operation are produced by above-mentioned common process parameter and are got final product.
The performance of the low-cost crease-resistant ferritic stainless steel hot-rolling coiled sheet of producing according to technique scheme reaches following requirement:
Tensile property: ys >=230MPa, tensile strength >=460MPa, elongation >=24%;
Hardness HV≤176;
Hot-rolled sheet through cold rolling, annealing after, tensile deformation vertically 20%, the wrinkling height that stretches≤12 μ m.
Positively effect of the present invention: the present invention adopts the CSP Production Flow Chart, according to the physical metallurgy characteristics of CSP, design optimization the chemical ingredients of ferritic stainless steel, do not add alloying elements such as niobium, titanium, rare earth in this composition; Particularly adopt the soft technology of depressing of thick continuous-casting sheet billet of 75～90mm and dynamic fluid flow core; Make column crystal broken; Enlarge the ratio and the refined cast structure of as cast condition equiax crystal; The minimizing component segregation that column crystal causes during because of casting blank solidification significantly reduces the material viscous deformation ununiformity that is caused by component segregation in the following process process, thereby significantly improves the wrinkling defective on ferritic stainless steel shell surface.And the big characteristics of combination sheet billet continuous casting and rolling production line single pass draught; Guarantee to be with steel that perfect recrystallization takes place in course of hot rolling, make the hot rolling attitude be organized as polygonal equi-axed crystal, do not need the annealing operation of hot rolled coil; Directly pickling; Cooling rolls, thereby reduces production costs greatly, and makes the band steel have good wrinkle resistance.
Embodiment
Below, the present invention is described further through specific embodiment.
Implement 1: the steel plate finished product thickness is 0.6mm, and its chemical ingredients is following according to the weight percent proportioning: C:0.02%, Si:0.60%; Mn:0.35%, P:0.016%, S:0.008%; Ni:0.75%, Als:0.020%, Cr:16%; N:0.025%, surplus Fe and unavoidable impurities.Main production process: converter smelting, external refining, sheet blank continuous casting, continuously cast bloom heating, hot rolling, cold rolling, annealing.Wherein, the sheet blank continuous casting operation: molten steel injects tundish through the slide gate nozzle of ladle bottom, and the liquid steel temperature of tundish is 1525 ℃, and the molten steel of tundish injects mold through the submerged nozzle of flat, and mold is long funnel-type crystallizer; The pulling rate of strand is 5.0m/min, and the slab thickness that goes out mold is 75mm, soft draught 5mm.Rolling technology control: the strand charging temperature is 900 ℃, and slab heating temperature is 1150 ℃, and the roughing final temperature is controlled at 1100 ℃, and the finish rolling final temperature is controlled at 950 ℃, and coiling temperature is controlled at 760 ℃.Cold rolling draft 75% connects and moves back 900 ℃ of temperature.The ys 230MPa of hot-rolled finished product plate, tensile strength 460MPa, elongation 26%, hardness HV are 149.Hot-rolled sheet through cold rolling, annealing after, the wrinkling height that stretches is 8.6 μ m.
Implement 2: the steel plate finished product thickness is 0.4mm, and its chemical ingredients is following according to the weight percent proportioning: C:0.06%, Si:0.20%; Mn:0.80%, P:0.025%, S:0.010%; Ni:0.65%, Als:0.020%, Cr:18%; N:0.020%, surplus Fe and unavoidable impurities.Main production process: converter smelting, external refining, sheet blank continuous casting, continuously cast bloom heating, hot rolling, cold rolling, annealing.Wherein, the sheet blank continuous casting operation: molten steel injects tundish through the slide gate nozzle of ladle bottom, and the liquid steel temperature of tundish is 1565 ℃, and the molten steel of tundish injects mold through the submerged nozzle of flat, and mold is long funnel-type crystallizer; The pulling rate of strand is 3.5m/min, and the slab thickness that goes out mold is 90mm, soft draught 25mm.Rolling technology control: the strand charging temperature is 950 ℃, and slab heating temperature is 1050 ℃, and the roughing final temperature is controlled at 1000 ℃, and the finish rolling final temperature is controlled at 800 ℃, and coiling temperature is controlled at 660 ℃.Cold rolling draft 75% connects and moves back 850 ℃ of temperature.The ys 245MPa of hot-rolled finished product plate, tensile strength 465MPa, elongation 25%, hardness HV are 157.Hot-rolled sheet through cold rolling, annealing after, the wrinkling height that stretches is 9.3 μ m.
Implement 3: the steel plate finished product thickness is 0.3mm, and its chemical ingredients is following according to the weight percent proportioning: C:0.03%, Si:0.40%; Mn:0.58%, P:0.012%, S:0.015%; Ni:0.70%, Als:0.025%, Cr:17%; N:0.026%, surplus Fe and unavoidable impurities.Main production process: converter smelting, external refining, sheet blank continuous casting, continuously cast bloom heating, hot rolling, cold rolling, annealing.Wherein, the sheet blank continuous casting operation: molten steel injects tundish through the slide gate nozzle of ladle bottom, and the liquid steel temperature of tundish is 1540 ℃, and the molten steel of tundish injects mold through the submerged nozzle of flat, and mold is long funnel-type crystallizer; The pulling rate of strand is 4.5m/min, and the slab thickness that goes out mold is 80mm, soft draught 10mm.Rolling technology control: the strand charging temperature is 960 ℃, and slab heating temperature is 1130 ℃, and the roughing final temperature is controlled at 1050 ℃, and the finish rolling final temperature is controlled at 900 ℃, and coiling temperature is controlled at 730 ℃.Cold rolling draft 82% connects and moves back 860 ℃ of temperature.The ys 280MPa of hot-rolled finished product plate, tensile strength 485MPa, elongation 28%, hardness HV are 161.Hot-rolled sheet through cold rolling, annealing after, the wrinkling height that stretches is 10.1 μ m.
Implement 4: the steel plate finished product thickness is 0.35mm, and its chemical ingredients is following according to the weight percent proportioning: C:0.031%, Si:0.45%; Mn:0.20%, P:0.014%, S:0.008%; Ni:0.66%, Als:0.023%, Cr:17.2%; N:0.021%, surplus Fe and unavoidable impurities.Main production process: converter smelting, external refining, sheet blank continuous casting, continuously cast bloom heating, hot rolling, cold rolling, annealing.Wherein, the sheet blank continuous casting operation: molten steel injects tundish through the slide gate nozzle of ladle bottom, and the liquid steel temperature of tundish is 1545 ℃, and the molten steel of tundish injects mold through the submerged nozzle of flat, and mold is long funnel-type crystallizer; The pulling rate of strand is 4.2m/min, and the slab thickness that goes out mold is 85mm, soft draught 15mm.Rolling technology control: the strand charging temperature is 940 ℃, and slab heating temperature is 1120 ℃, and the roughing final temperature is controlled at 1060 ℃, and the finish rolling final temperature is controlled at 910 ℃, and coiling temperature is controlled at 740 ℃.Cold rolling draft 84% connects and moves back 865 ℃ of temperature.The ys 290MPa of hot-rolled finished product plate, tensile strength 495MPa, elongation 27%, hardness HV are 163.Hot-rolled sheet through cold rolling, annealing after, the wrinkling height that stretches is 10.5 μ m.
Implement 5: the steel plate finished product thickness is 0.5mm, and its chemical ingredients is following according to the weight percent proportioning: C:0.029%, Si:0.43%; Mn:0.46%, P:0.013%, S:0.007%; Ni:0.68%, Als:0.024%, Cr:17.3%; N:0.015%, surplus Fe and unavoidable impurities.Main production process: converter smelting, external refining, sheet blank continuous casting, continuously cast bloom heating, hot rolling, cold rolling, annealing.Wherein, the sheet blank continuous casting operation: molten steel injects tundish through the slide gate nozzle of ladle bottom, and the liquid steel temperature of tundish is 1550 ℃, and the molten steel of tundish injects mold through the submerged nozzle of flat, and mold is long funnel-type crystallizer; The pulling rate of strand is 4.6m/min, and the slab thickness that goes out mold is 85mm, soft draught 15mm.Rolling technology control: the strand charging temperature is 945 ℃, and slab heating temperature is 1125 ℃, and the roughing final temperature is controlled at 1030 ℃, and the finish rolling final temperature is controlled at 890 ℃, and coiling temperature is controlled at 720 ℃.Cold rolling draft 79% connects and moves back 880 ℃ of temperature.The ys 270MPa of hot-rolled finished product plate, tensile strength 475MPa, elongation 29%, hardness HV are 158.Hot-rolled sheet through cold rolling, annealing after, the wrinkling height that stretches is 10.8 μ m.
Implement 6: the steel plate finished product thickness is 0.4mm, and its chemical ingredients is following according to the weight percent proportioning: C:0.032%, Si:0.41%; Mn:0.44%, P:0.011%, S:0.009%; Ni:0.67%, Als:0.026%, Cr:16.8%; N:0.016%, surplus Fe and unavoidable impurities.Main production process: converter smelting, external refining, sheet blank continuous casting, continuously cast bloom heating, hot rolling, cold rolling, annealing.Wherein, the sheet blank continuous casting operation: molten steel injects tundish through the slide gate nozzle of ladle bottom, and the liquid steel temperature of tundish is 1547 ℃, and the molten steel of tundish injects mold through the submerged nozzle of flat, and mold is long funnel-type crystallizer; The pulling rate of strand is 4.0m/min, and the slab thickness that goes out mold is 90mm, soft draught 20mm.Rolling technology control: the strand charging temperature is 935 ℃, and slab heating temperature is 1135 ℃, and the roughing final temperature is controlled at 1060 ℃, and the finish rolling final temperature is controlled at 920 ℃, and coiling temperature is controlled at 730 ℃.Cold rolling draft 82% connects and moves back 870 ℃ of temperature.The ys 275MPa of hot-rolled finished product plate, tensile strength 480MPa, elongation 27%, hardness HV are 161.Hot-rolled sheet through cold rolling, annealing after, the wrinkling height that stretches is 11.8 μ m.
Claims (4)
1. the crease-resistant ferritic stainless steel of low cost is characterized in that chemical ingredients is following according to the weight percent proportioning: C:0.02～0.06%, Si:0.20～0.60%; Mn:0.20～0.80%, Cr:16～18%, P :≤0.025%; S :≤0.015%; Ni≤0.75%, Als:0.020～0.030%, N≤0.025% surplus is Fe and inevitable impurity.
2. the working method of the crease-resistant ferritic stainless steel of low cost is characterized in that comprising converter smelting, external refining, continuous casting, hot rolling, cold rolling, cold coiling annealing operation, and converter smelting, external refining Working Procedure Controlling chemical ingredients are following according to the weight percent proportioning: C:0.02～0.06%; Si:0.20～0.60%; Mn:0.20～0.80%, Cr:16～18%, P :≤0.025%; S :≤0.015%; Ni≤0.75%, Als:0.020～0.030%, N≤0.025% surplus is Fe and inevitable impurity; Said continuous casting working procedure adopts sheet blank continuous casting, and molten steel temperature in tundish is in the sheet blank continuous casting operation: 1525～1565 ℃, the pulling rate of strand is 3.5～5.0m/min, and going out the mold slab thickness is 75～90mm; Continuous casting adopts the soft technology of depressing of dynamic fluid flow core, and soft draught is 5～25mm, to eliminate component segregation and to smash column crystal, enlarges the ratio and the thinning solidification structure of as cast condition equiax crystal; Proportion of equiaxed grain in the continuously cast bloom solidified structure>=60%.
3. the working method of the crease-resistant ferritic stainless steel of a kind of low cost according to claim 2; It is characterized in that slab heating temperature is 1050～1150 ℃ in the said hot-rolled process; The roughing final temperature is controlled at 1000～1100 ℃; Roughing is two rolling mill tandem rollings, and the single pass draft is not less than 40%; The intermediate blank that roughing is come out gets into finishing train through intermediate table; Finish rolling is five to seven rolling mill tandem rollings, and the finish rolling temperature in is controlled at 900～1050 ℃, and the finish rolling final temperature is controlled at 800～950 ℃; Finish rolling outlet single pass draught is greater than 20%, and coiling temperature is controlled at 660～760 ℃.
4. according to the working method of claim 2 or the crease-resistant ferritic stainless steel of 3 described a kind of low costs; It is characterized in that said cold rolling, cold coiling annealing operation; The stainless steel hot-rolling coiled sheet is after pickling; To obtaining to adopt once cold rolling or twice cold-rolling practice between the cold rolling production board, add up cold rolling draft >=75% from hot-rolled sheet; Cold rolled strip carries out continuous annealing after pickling handles, and annealing temperature is controlled at 850～900 ℃.
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| CN103667950A (en) * | 2013-12-05 | 2014-03-26 | 宁波宝新不锈钢有限公司 | 430 stainless steel for cold stamping processing, and manufacturing method thereof |
| CN107012302A (en) * | 2017-05-12 | 2017-08-04 | 宁波诺宏金属材料技术咨询有限公司 | A kind of anti-creping of stainless steel |
| CN107262532A (en) * | 2017-05-31 | 2017-10-20 | 舞阳钢铁有限责任公司 | A kind of heating rolling production method of ultra-wide stainless steel plate |
| CN107746938A (en) * | 2017-12-05 | 2018-03-02 | 东北大学 | One kind is containing ultrapure high chromium content ferrite wrinkle-resistant stainless steel of rare earth and preparation method thereof |
| CN108348990A (en) * | 2015-11-12 | 2018-07-31 | 株式会社Posco | Austenitic stainless steel and its manufacturing method with excellent resistance to tangerine peel |
| CN108588578A (en) * | 2018-04-27 | 2018-09-28 | 中南大学 | Anti-corrosion cast steel of a kind of high molybdenum of no nickel and its preparation method and application |
| CN110252809A (en) * | 2019-07-01 | 2019-09-20 | 山西太钢不锈钢股份有限公司 | The method of chrome ferritic stainless steel rough surface band in reduction |
| CN110592494A (en) * | 2019-09-24 | 2019-12-20 | 王平 | Nickel-containing ferrite stainless steel smelted from laterite-nickel ore and preparation method thereof |
| CN111356782A (en) * | 2017-08-31 | 2020-06-30 | 株式会社Posco | Ferrite-based stainless steel having improved heat radiation characteristics and workability and method for preparing the same |
| CN113088654A (en) * | 2021-04-06 | 2021-07-09 | 山西太钢不锈钢股份有限公司 | Production method for improving macrosegregation of niobium-containing ferrite stainless steel plate |
| CN113604639A (en) * | 2021-08-09 | 2021-11-05 | 长春工业大学 | Heat treatment method for improving surface wrinkling of phase-change ferrite stainless steel |
| CN114381589A (en) * | 2021-11-26 | 2022-04-22 | 安阳钢铁股份有限公司 | Preparation method of environment-friendly and economical steel for goods shelves |
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