CN113481432A - High-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and manufacturing method thereof - Google Patents
High-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and manufacturing method thereof Download PDFInfo
- Publication number
- CN113481432A CN113481432A CN202110673771.7A CN202110673771A CN113481432A CN 113481432 A CN113481432 A CN 113481432A CN 202110673771 A CN202110673771 A CN 202110673771A CN 113481432 A CN113481432 A CN 113481432A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- strength
- austenitic stainless
- hardness
- corrosion
- 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
Links
Classifications
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
-
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Abstract
The invention provides high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and a manufacturing method thereof, wherein the high-strength high-hardness corrosion-resistant austenitic stainless steel comprises the following raw materials of less than 0.08% of carbon, less than 1.00% of silicon, less than 2.00% of manganese, less than 0.035% of phosphorus, less than 0.003% of sulfur, 18.00-20.00% of chromium, 8.00-10.05% of nickel, less than 0.04% of copper and the balance of iron. According to the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and the manufacturing method thereof, the stainless steel material product produced by the manufacturing method has the advantages of high strength, high hardness, corrosion resistance, fire resistance, sound insulation, heat insulation, excellent processing and forming performance and excellent welding performance. The product meets the user requirements of different areas and different use environments in the whole country, is economical and practical, and is easy to popularize.
Description
Technical Field
The invention belongs to the technical field of austenitic stainless steel, and particularly relates to high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and a manufacturing method thereof.
Background
The door and window as an important component of the building outer enclosure structure must have the performances of air tightness, water tightness, wind pressure resistance, heat preservation, heat insulation, sound insulation and the like. The material of door and window is mainly made of wood, glass, plastics, aluminium material, steel and copper material. Along with the improvement of the production level of people, the door and window has more and more attracted attention in the aspects of applicability, durability, safety, attractiveness and the like.
The austenitic stainless steel is used as a typical material in steel materials, has the performances of fire prevention, sound insulation, heat insulation and the like, and also has the performances of acid resistance, alkali resistance, corrosion resistance, excellent processing forming performance and excellent welding performance. On one hand, the door and window industry can select various austenitic stainless steel materials with different quality levels, and research and development of new materials specially facing the industry with high quality requirements are not provided. When the common austenitic stainless steel is used for products in the door and window industry, the material strength, hardness and product rigidity are low, the service life is short, and the performance distribution is uneven. On the other hand, after being processed into a door and window pull rod, the common austenitic stainless steel material has the phenomena of rusting and corrosion in the use process, and the phenomena of rusting and corrosion are relatively more frequent particularly in areas with relatively high humidity, such as southwest areas, and on the projects, such as houses, hotels, exhibitions and the like near enterprises, such as chemical plants, cement plants, coal mines, iron ores and the like, so that the quality and brand image of the door and window manufacturing enterprises are directly influenced.
In 2019, a large number of market research, product research and development and optimization are carried out, and the austenitic stainless steel for door and window products and the manufacturing method thereof are successfully developed. The austenitic stainless steel door and window product of nearly 1 ten thousand tons produced by the invention is widely applied to the items of famous real estate such as Wanke, Pigui garden, Hengda and the like, the product has no pollution, and the scrap steel can be recovered by 100 percent. The developed product is a green recyclable material, has obvious characteristics of high strength, high hardness and corrosion resistance, and is widely used in door and window products and hardware accessories thereof such as pull rods, limiters, corner devices, hinges and the like.
Disclosure of Invention
In view of the above, the present invention is directed to provide a high-strength, high-hardness and corrosion-resistant austenitic stainless steel for doors and windows, so as to solve the problems of low strength, low hardness and poor corrosion resistance of the prior art austenitic stainless steel for doors and windows.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows comprises the following raw materials, wherein the raw materials comprise less than 0.08% of carbon, less than 1.00% of silicon, less than 2.00% of manganese, less than 0.035% of phosphorus, less than 0.003% of sulfur, 18.00-20.00% of chromium, 8.00-10.05% of nickel, less than 0.04% of copper and the balance of iron.
Compared with the prior art, the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows has the following advantages:
(1) the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows, disclosed by the invention, is composed of the raw materials, so that the material has better chlorine ion corrosion resistance and grain boundary corrosion resistance, and therefore, the austenitic stainless steel has the mechanical property characteristics of high strength and high hardness and excellent corrosion resistance, and the austenitic stainless steel plate belt is suitable for producing door and window products and hardware fittings thereof and has long service life.
(2) The high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows, disclosed by the invention, is a stainless steel material produced by adopting the austenitic stainless steel method, which is sold by nearly 1 ten thousand tons, and creates about 200 thousand economic benefits for enterprises.
The invention also aims to provide a manufacturing method of the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows, so as to solve the problems that the prior austenitic stainless steel for doors and windows is unstable in material strength, hardness and corrosion resistance and complex in operation during production.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the manufacturing method of the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows comprises the following steps:
s1, smelting the raw materials of the austenitic stainless steel to form a billet through continuous casting;
s2, sequentially carrying out hot rolling process, hot rolled steel coil annealing process, pickling process, rolling process, cold hard coil annealing pickling process and finishing process on the obtained steel billet to obtain a stainless steel plate strip product;
and S3, sequentially carrying out mechanical property detection and neutral salt spray test on the stainless steel plate strip product in the step S2 to obtain the austenitic stainless steel which is suitable for producing high-strength, high-hardness and corrosion-resistant.
Further, the hot-rolled steel coil annealing process in the step S2 adopts a rapid water cooling mode, and the water cooling flow rate is 60-80m3The cooling time is 10-20s, and the temperature of the hot rolled steel coil annealing process is increased by 10-30 ℃ compared with that of the common material.
Further, the oxygen content of the hot-rolled steel coil annealing process in the step S2 is 5%, and the oxygen content of the cold-hard coil annealing pickling process is 3.5%.
Further, the acid washing process in the step S2 includes a sulfuric acid washing process, a first scrubbing process, a mixed acid washing process and a second scrubbing process which are sequentially processed, the sulfuric acid mass fraction of the sulfuric acid washing process is 98%, the sulfuric acid washing concentration is 230-300 g/l, the sulfuric acid washing temperature is 70-80 ℃, and the mixed acid washing temperature range of the mixed acid washing process is 45-60 ℃.
Further, the sulfuric acid consists of ash, arsenic, lead and mercury, wherein the mass fraction of the ash is not more than 0.02%, the mass fraction of iron is not more than 0.005%, the mass fraction of arsenic is not more than 0.0001%, the mass fraction of lead is not more than 0.005%, the mass fraction of mercury is not more than 0.001%, and the transparency is not less than 80 mm.
Further, the mixed acid comprises 65% by mass of nitric acid and 55% by mass of hydrofluoric acid, the concentration range of the nitric acid is 110-160 g/l, and the concentration range of the hydrofluoric acid is 10-30 g/l.
Furthermore, the bristles of the first brushing process are made of SiC, the brushing reduction is 3mm, the bristles of the second brushing process are made of PP, and the brushing reduction is 2 mm.
Further, the annealing and pickling process for the cold hard coil in the step S2 includes a neutral salt electrolytic pickling process and a mixed acid pickling process for the cold hard coil, wherein the concentration of sodium sulfate in the neutral salt electrolytic pickling process is 100-250g/l, and the temperature of sodium sulfate is 70-85 ℃.
Further, the tensile strength detected in the mechanical property in the step S3 is 700-900MPa, the yield strength is 300-400MPa, and the HV hardness is 170-220.
Compared with the prior art, the manufacturing method of the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows has the following advantages:
(1) according to the manufacturing method of the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows, the stainless steel material product produced by the manufacturing method has the advantages of high strength, high hardness, corrosion resistance, fire resistance, sound insulation, heat insulation, excellent processing forming performance and excellent welding performance. Products are supplied to famous real estate projects such as the Wanke, the Pigui garden and the Hengda through door and window processing enterprises such as Shandong and Guangdong, so that the user requirements of various regions and different use environments in China are met, and the manufacturing quality and brand image of the enterprises are directly improved.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail with reference to examples.
The high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows comprises the following raw materials, wherein the raw materials comprise less than 0.08% of carbon, less than 1.00% of silicon, less than 2.00% of manganese, less than 0.035% of phosphorus, less than 0.003% of sulfur, 18.00-20.00% of chromium, 8.00-10.05% of nickel, less than 0.04% of copper and the balance of iron. According to the specific embodiment of the present invention, the raw material composition of the austenitic stainless steel has a copper content of 0.04% or less, a phosphorus content of 0.035% or less, and a sulfur content of 0.003% or less (based on the total weight of the austenitic stainless steel), and phosphorus and sulfur are important factors causing component segregation, and play an important role in the uniformity of chemical components, and internal structure of the material, and directly affect the corrosion resistance of the material. In the invention, the phosphorus content is less than 0.035% and the sulfur content is less than 0.003%, so that the material has better resistance to chloride ion corrosion and grain boundary corrosion.
The manufacturing method of the high-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows comprises the following steps:
s1, smelting the raw materials of the austenitic stainless steel to form a billet through continuous casting;
s2, sequentially carrying out hot rolling process, hot rolled steel coil annealing process, pickling process, rolling process, cold hard coil annealing pickling process and finishing process on the obtained steel billet to obtain a stainless steel plate strip product;
and S3, sequentially carrying out mechanical property detection and neutral salt spray test on the stainless steel plate strip product in the step S2 to obtain the austenitic stainless steel which is suitable for producing high-strength, high-hardness and corrosion-resistant.
In the embodiment of the invention, the hot-rolled steel coil annealing process is to continuously anneal the hot-rolled black strip steel coil with the thickness of 3.0-6.0mm at the temperature of 950-Compared with common materials, the annealing temperature is increased by 10-30 ℃. By increasing the heating temperature, the solid solution treatment capacity is increased, and the binding force of the matrix structure is strengthened. Rapid water cooling is adopted, and the water cooling flow is 60-80m3The cooling time is 10-20s, and the intergranular corrosion resistance is improved by reducing the precipitation of carbon element. In the embodiment of the invention, after the strip steel is cooled to the ambient temperature, the mechanical descaling, the shot blasting machine set, the sulfuric acid pickling, the mixed acid pickling of nitric acid and hydrofluoric acid and the brushing are sequentially carried out.
The hot-rolled steel coil annealing process in the step S2 adopts a rapid water cooling mode, and the water cooling flow is 60-80m3And h, cooling for 10-20s, wherein the temperature of the hot rolled steel coil annealing process is increased by 10-30 ℃ compared with that of a common material, and the common material is stainless steel for common door and window processing.
The oxygen content of the hot-rolled steel coil annealing process in the step S2 is 5%, and the oxygen content of the cold hard coil annealing and pickling process is 3.5%. The oxygen content of the atmosphere in the annealing furnace has great influence on the change of an oxide layer, and the thickness of the oxide layer is increased due to the overhigh oxygen content; too low oxygen content will increase the thickness of the compact iron-chromium oxide layer and increase the difficulty of pickling. In an embodiment of the invention, the oxygen content is 3-7%. Preferably, a weak oxidizing atmosphere is adopted in the continuous annealing of the austenitic strip steel, the oxygen content is 5 percent, the thorough pickling of a subsequent pickling process is ensured, and the surface corrosion resistance is improved.
The acid cleaning process in the step S2 includes a sulfuric acid cleaning process, a first cleaning process, a mixed acid cleaning process (nitric acid + hydrofluoric acid), and a second cleaning process, which are sequentially processed, wherein the sulfuric acid cleaning process includes 98% by mass of sulfuric acid, a sulfuric acid cleaning concentration of 230-300 g/l, a sulfuric acid cleaning temperature of 70-80 ℃, a mixed acid cleaning temperature range of 45-60 ℃, and the acid cleaning process includes the sulfuric acid cleaning process, the mixed acid cleaning process, and the cleaning process in the actual operation. The acid washing effect can be increased by increasing the temperature as well as the concentration, the temperature is increased, the chemical reaction is rapid, and the acid washing effect is good. However, too high a temperature will cause H2In O, H2、O2Increase to generate yellow spot defect and prevent the acid liquor from generating chemistry with the iron-chromium oxide layer in the oxide layerIn the reaction, in the embodiment of the invention, the mixed acid pickling temperature of the mixed acid pickling process is preferably 45-60 ℃, so that the pickling effect is remarkable.
The sulfuric acid consists of ash, arsenic, lead and mercury, wherein the mass fraction of the ash is not more than 0.02%, the mass fraction of iron is not more than 0.005%, the mass fraction of the arsenic is not more than 0.0001%, the mass fraction of the lead is not more than 0.005%, the mass fraction of the mercury is not more than 0.001%, and the transparency is not less than 80mm, and the sulfuric acid pickling adopts 98% high-grade sulfuric acid, wherein the mass fraction of the ash is not more than 0.02%, the mass fraction of the iron is not more than 0.005%, the mass fraction of the arsenic is not more than 0.0001%, the mass fraction of the lead is not more than 0.005%, the mass fraction of the mercury is not more than 0.001%, and the transparency is not less than 80 mm.
In the embodiment of the invention, superior sulfuric acid with the mass fraction of 98% and demineralized water are prepared into acid liquid with the concentration of 100-300g/l according to the unequal ratio of 1:500-1:2000, and the acid liquid passes through an acid tank device and Fe in an oxide layer on the surface of stainless steel2O3、Fe3O4FeO and Fe react with sulfuric acid solution to remove iron scale; reacting with parent metal to generate gas for blasting scale, and pickling to remove an oxide layer on the surface of the hot-rolled coil, thereby improving the corrosion resistance, wherein the reaction equation is as follows:
Fe2O3+3H2SO4＝Fe2(SO4)3+3H2O；
Fe3O4+4H2SO4＝Fe2(SO4)3+3FeSO4+4H2O；
FeO+H2SO4＝FeSO4+H2O；
Fe+H2SO4＝FeSO4+H2↑；
H2SO4the acid pickling concentration has the best descaling effect within a certain range, H2SO4The increase in the pickling concentration does not always improve the pickling effect, when H2SO4After the concentration reaches a certain value, the sulfuric acid may oxidize the 2-valent iron ions into 3-valent iron ions, react with the parent metal and seriously corrode the matrix, but does not react with the ferrochrome oxideAnd reacting with the surrounding matrix below the ferrochrome oxide to finally make the ferrochrome oxide fall off from the surface of the matrix, so that the roughness of the strip steel is increased. In the present embodiment, preferably H2SO4The pickling concentration is 230-300 g/l, and the acid liquid reacts with the iron-chromium oxide but not with the parent metal, so that the corrosion resistance of the matrix is guaranteed.
The mixed acid comprises 65% of nitric acid and 55% of hydrofluoric acid by mass, the concentration range of the nitric acid is 110-160 g/l, the concentration range of the hydrofluoric acid is 10-30 g/l, 55% of first-grade hydrofluoric acid is adopted as the hydrofluoric acid by mass, the content of fluosilicic acid is not more than 0.50% by mass, and the content of nonvolatile acid is not more than 0.08% by mass.
In the embodiment of the invention, a nitric acid solution with a concentration of 100-200g/l and a hydrofluoric acid solution with a concentration of 20-50g/l are prepared by mixing 65 mass percent of superior nitric acid and 55 mass percent of superior hydrofluoric acid with demineralized water according to a ratio of 1:200-1: 1000.
Nitric acid is an oxidizing agent that promotes passivation of stainless steel, but used alone has no acid pickling descaling effect. Hydrofluoric acid is highly corrosive, not only pickling iron scale, but also eroding base metal, making the surface rough, affecting the corrosion resistance, therefore, both acids can not be used alone, but the mixed acid solution using them has the best effect, and a good surface can be obtained in a short time. In the embodiment of the invention, the iron-chromium oxide layer in the oxide layer is removed by acid cleaning of nitric acid and hydrofluoric acid, and dense Cr is formed on the surface of the strip steel2O3The layer improves the corrosion resistance of the material and reduces the pitting corrosion tendency of the material. The reaction equation is as follows:
Me+4HNO3＝Me(NO3)3+NO+2H2O ⑴
Me(NO3)3+3HF＝MeF3↓+3HNO3 ⑵
the general chemical reaction formula:
Me+3HNO3+3HF＝MeF3↓+NO↑+2H2O ⑶
in the embodiments of the present inventionMedium, HNO3The concentration is preferably 110-160 g/l, the concentration of HF is preferably 10-30 g/l, and compact and complete Cr is formed2O3Layer, possesses comprehensive corrosion resistance.
The bristles of the first brushing process are made of SiC, the brushing reduction is 3mm, the bristles of the second brushing process are made of PP, and the brushing reduction is 2 mm. The scrubbing is to scrub the acid washing reactant attached to the steel strip, and is a mechanical descaling method, and the completeness of the surface of the steel strip is not damaged by setting certain parameters. The brushing after sulfuric acid pickling has obvious influence on the surface pickling effect and directly influences the corrosion resistance of the substrate, so that high-hardness wear-resistant bristles are required to ensure clean brushing and continuous and stable operation of brushing. The scrubbing after mixed acid pickling is mainly to wash out the residual acid or impurities on the surface of the strip steel to avoid point corrosion caused by foreign matter residues, and soft bristles are selected to protect the compact and complete Cr formed by the mixed acid pickling2O3And meanwhile, residual acid or impurities on the surface of the strip steel are washed clean.
The brushing effect is directly related to the rolling reduction of the brushing roller, the rolling reduction is generally 1-5mm, the rolling reduction of the brushing roller is too small, the brushing is not clean, and acid washing reactants remain on the surface to influence the corrosion resistance. The excessive rolling reduction of the scrubbing roller can not only damage and form compact and complete Cr2O3And the service life of the brush roller is shortened. In the embodiment of the invention, the brushing reduction after sulfuric acid pickling is 3mm in a limited way, and the brushing reduction after mixed acid pickling is 2mm in a preferential way, so that the brushing effect is ensured, and the corrosion resistance is improved.
In the embodiment of the invention, the automatic control technology of the plate shape is adopted in the cold rolling process, the rolling process is provided with a rolling curve, the rolling curve adopts an A1 type curve, the reduction amplitude of two side edges is reduced by 50%, the curve coefficient of the middle part is 0, so that the material is uniform in transverse thickness distribution, the transverse thickness deviation is below 0.02mm, the material is ensured to be uniform in annealing in the subsequent annealing process, and the uniformity of the mechanical property is ensured.
The cold-hard coil annealing is a continuous annealing process, the annealing temperature is 50-150 ℃ lower than that of the austenitic stainless steel for common use, and the annealing temperature range is 950-1140 ℃. Through a special cold-hard coil annealing process technology, the material has the mechanical property characteristics of high strength, high rigidity and high hardness.
The oxygen content is a crucial factor in the annealing process of the cold-rolled strip steel, and the oxygen content is reduced correspondingly with the increase of the chromium content, and the oxygen content in the annealing process of the cold-rolled austenitic stainless steel is 2-5%. The reasonable annealing oxygen content process is beneficial to improving the structure of the oxide layer, improving the pickling effect of the subsequent process and improving the corrosion resistance. In the embodiment of the invention, the annealing is preferably performed by using an oxygen content of 3.5%, so as to provide guarantee for subsequent pickling.
The cold hard roll annealing and pickling process in step S2 includes a neutral salt electrolytic pickling process in which sodium sulfate (Na) is included and a cold hard roll mixed acid pickling process (nitric acid + hydrofluoric acid)2SO4) The concentration of the sodium sulfate is 100-250g/l, the temperature of the sodium sulfate is 70-85 ℃, and Na is generated in the neutral salt electrolytic pickling process2SO4The concentration is 100-250g/l, and 150g/l is preferably adopted; na in neutral salt electrolytic pickling process2SO4The temperature of the solution is 70-85 ℃, preferably 75 ℃; HNO in cold-hard coil mixed acid pickling process3The concentration range is 60-100 g/l, and the concentration of HF is preferably 10-20 g/l; the mixed acid pickling temperature in the cold hard coil mixed acid pickling process is 45-55 ℃; the temper rolling elongation after cold rolling and annealing was 0.5%, temper rolling tension was controlled at 125KN, and rolling force was 2200 KN.
In the present embodiment, sodium sulfate solution is preferably used as the medium. By using Na2SO4The greatest benefit of electrolysis is that the sodium sulfate solution reacts only with the oxides on the surface of the strip and not with the parent material. Meanwhile, the sodium sulfate solution can dissolve chromium oxide, and the chromium oxide is converted into CrO 42-dissolved in water under the action of current, so that a compact oxide layer is damaged, and the subsequent mixed acid pickling solution can play a greater role. In addition, the water on the surface of the strip steel is electrolyzed into H2And O2The oxide on the surface can be stripped by the force formed by the escape from the surface of the strip steel, so that the oxide layer on the surface of the matrix can be thoroughly pickled, the corrosion resistance of the matrix is improved, and chemical reactions such asThe following:
(1) electrochemical reaction Na occurring on the surface of the electrode plate2SO4＝2Na++SO4 2-；
Cathode 2Na++2e-＝2Na；2Na+2H2O＝2NaOH+H2；
Anode SO4 2--2e-＝SO3+1/2O2；SO3+H2O＝H2SO4；
(2) Electrochemical reaction on the surface of the steel plate in the cathode region
SO4 2--2e-＝SO3+1/2O2 SO3+H2O＝H2SO4；
Fe2O3-6e-＝2Fe3++3/2O2；
Cr2O3+5H2O-6e-＝2CrO4 2-+10H+；
Cr+4H2O-6e-＝CrO4 2-+8H+；
(3) Reactions taking place in solution
Fe3++3OH-＝Fe(OH)3；
2NaOH+H2SO4＝Na2SO4+H2O；
It is worth to be noted that in the whole reaction process, NaSO4 is only used as a conductive medium and is responsible for the transfer of electrons, the chemical reaction does not occur, and only the NaSO is carried out of the tank body along with the running of the strip steel and the discharge of precipitates, so that the NaSO4The solution does not damage the integrity of the matrix, so that the uniform corrosion resistance of the matrix is excellent.
With Na2SO4The concentration is increased, the solution resistance is reduced, the conductivity is enhanced, and the electrolysis efficiency is improved. When the concentration is too high, the solution is easy to crystallize when the temperature changes, and is easy to block pipelines and heat exchangers and damage valves and pumps. In an embodiment of the present invention, Na2SO4The concentration is 100-250g/l, preferably 150 g/l.
Na2SO4The higher the temperature of the solution is, the higher the energy of ions or atoms participating in the reaction is, and the chemical reaction capacity is strong, wherein the chemical reaction capacity is doubled every time the temperature is increased by 15 ℃. But the temperature is too high, the water evaporation capacity is large, the energy loss is large, and the grade requirement of the anticorrosive material is also high. In an embodiment of the present invention, Na2SO4The solution temperature is 70-85 deg.C, preferably 75 deg.C.
In the embodiment of the invention, the nitric acid in the mixed acid pickling of the nitric acid and the hydrofluoric acid adopts 65% by mass of nitric acid as a superior product, wherein the mass fraction of the nitrous acid is not more than 0.20%, and the mass fraction of the ignition residue is not more than 0.02%.
In the embodiment of the invention, the hydrofluoric acid in the mixed acid pickling of the nitric acid and the hydrofluoric acid adopts 55% of first-class hydrofluoric acid by mass fraction, wherein the mass fraction of the fluosilicic acid content is not more than 0.50%, and the mass fraction of the nonvolatile acid is not more than 0.08%.
In the embodiment of the invention, a nitric acid solution with the concentration of 40-120g/l and a hydrofluoric acid solution with the concentration of 5-20g/l are prepared by mixing 65% of superior nitric acid with 55% of first-grade hydrofluoric acid with demineralized water according to the proportion of 1:100-1: 500.
In an embodiment of the invention, HNO3The concentration is preferably 60-100 g/l, the concentration of HF is preferably 10-20 g/l, and compact and complete Cr is formed2O3Layer, possesses comprehensive corrosion resistance.
The acid temperature during mixed acid pickling has a direct relationship to the surface quality. The acid temperature is not too high or too low, and the acid pickling speed is accelerated due to the too high acid temperature, so that the acid liquor containing FeF3 is dried on the surface of the steel strip to form acid prints, and the appearance quality is influenced. Too low acid temperature can reduce the acid cleaning effect of the mixed acid, increase the pitting corrosion tendency and influence the corrosion resistance. In the embodiment of the invention, the temperature of mixed acid pickling is preferably 45-55 ℃, so that the pickling effect is remarkable.
In the embodiment of the invention, the flattening elongation after pickling is 0.3-1.0%, the flattening tension is controlled by 140KN and the rolling force is controlled by 3000KN and 2000-3000KN, so that the plate flatness is further improved.
In step S3, the tensile strength detected by the mechanical property is 700-900MPa, the yield strength is 300-400MPa, and the HV hardness is 170-220. the mechanical property detection is performed on each coil, so that the tensile strength is 700-900MPa, the yield strength is 300-400MPa, and the HV hardness is 170-220.
And (3) performing an irregular non-differential sampling neutral salt spray test on the product, wherein the test time is more than or equal to 72 hours, and the evaluation grade is not lower than 9.5 grade.
The austenitic stainless steel plate strip obtained by the manufacturing method provided by the invention has the mechanical property characteristics of high strength and high hardness and excellent corrosion resistance, so that the austenitic stainless steel plate strip is suitable for producing door and window products and hardware fittings thereof and has long service life.
In the embodiment of the invention, the heating temperature of the hot-rolled steel coil is increased, the solid solution treatment capacity is increased, and the binding force of the matrix structure is strengthened. And rapid water cooling is adopted, and the intercrystalline corrosion resistance is improved by reducing the precipitation of carbon element. And 5% of oxidizing atmosphere is adopted in annealing of the hot-rolled steel coil, so that thorough pickling of a subsequent pickling process is guaranteed, and the surface corrosion resistance is improved. 230-300 g/l H is adopted2SO4Acid liquor reacts with iron-chromium oxide but not with parent metal, so that the corrosion resistance of the matrix is guaranteed. At 110-160 g/l HNO3Mixed with 10-30 g/lHF to form compact and complete Cr2O3Layer, possesses comprehensive corrosion resistance. In the brushing process after pickling, the SiC bristles and the PP bristles are used, so that compact and complete Cr formed by mixed acid pickling is protected2O3And meanwhile, washing the residual acid or impurities on the surface of the strip steel.
In the embodiment of the invention, the annealing temperature is reduced by 50-150 ℃, so that the material has the mechanical property characteristics of high strength, high rigidity and high hardness. After the cold-rolled hard coil is annealed, a sodium sulfate solution is preferentially selected as a medium in a process of neutral salt electrolysis and mixed acid (nitric acid and hydrofluoric acid) pickling, so that an oxide layer on the surface of a matrix is thoroughly pickled, and the corrosion resistance of the matrix is improved. 60-100 g/l HNO is adopted in mixed acid pickling after cold hard coil annealing3Mixing with 10-20 g/l HF to form compact and complete Cr2O3Layer, possesses comprehensive corrosion resistance.
In the embodiment of the invention, the dynamic monitoring of the finished steel strip is realized by formulating a door and window product mechanical performance control and inspection method, the characteristic that the material stably reaches high strength and high hardness among batches is ensured, and the requirement of door and window industry on the mechanical performance index of the raw material is met. The corrosion resistance is quantitatively evaluated by carrying out the neutral salt spray test on door and window products by irregular and non-differential sampling.
Example 1
The embodiment provides austenitic stainless steel suitable for producing door and window products, which comprises the following raw materials of 0.043% of carbon, 0.419% of silicon, 1.214% of manganese, 0.032% of phosphorus, 0.001% of sulfur, 18.30% of chromium, 8.02% of nickel, 0.03% of copper and the balance of iron, wherein the total weight of the austenitic stainless steel is taken as a reference.
The austenitic stainless steel is manufactured by the following method: the method comprises the steps of smelting and continuously casting various raw materials of the austenitic stainless steel into a steel billet, and then sequentially carrying out hot rolling, hot-rolled steel coil annealing, pickling, rolling, cold-hard coil annealing and pickling, finishing, mechanical property detection and neutral salt spray test on the obtained steel billet to obtain the austenitic stainless steel suitable for producing high-strength, high-hardness and corrosion-resistant steel.
The hot-rolled black strip steel coil is continuously annealed at the temperature of 950-1170 ℃, the temperature of the first preheating region is 970 ℃, the temperatures of the first heating region to the fifth heating region are 1180 ℃, and the temperature of the first heat preservation region is 1170 ℃.
The oxygen content in the annealing was 5%.
After annealing, rapid water cooling is adopted, and the water cooling flow rate is 70m3H, cooling time 15 s.
The pickling of the hot-rolled black strip coil after annealing adopts a sulfuric acid + mixed acid (nitric acid + hydrofluoric acid) pickling process. The sulfuric acid pickling adopts 98% of high-grade sulfuric acid, wherein the mass fraction of ash is not more than 0.02%, the mass fraction of iron is not more than 0.005%, the mass fraction of arsenic is not more than 0.0001%, the mass fraction of lead is not more than 0.005%, the mass fraction of mercury is not more than 0.001%, and the transparency is not less than 80 mm.
H in sulfuric acid pickling2SO4Acid wash concentration 250g/l, H2SO4The pickling temperature is 75 ℃.
In the mixed acid pickling of nitric acid and hydrofluoric acid, the nitric acid is a superior product with the mass fraction of 65%, wherein the mass fraction of nitrous acid is not more than 0.20%, and the mass fraction of ignition residues is not more than 0.02%. The hydrofluoric acid is first-grade hydrofluoric acid with mass fraction of 55%, wherein the mass fraction of the fluosilicic acid content is not more than 0.50%, and the mass fraction of the nonvolatile acid is not more than 0.08%.
HNO in mixed acid pickling of nitric acid and hydrofluoric acid3The concentration was 150g/l and the HF concentration was 25 g/l. The acid pickling temperature was 55 ℃.
The brushing after the sulfuric acid pickling is made of SiC bristles, and the brushing after the mixed acid pickling is made of PP bristles.
The brushing reduction after sulfuric acid pickling was 3mm, and the brushing reduction after mixed acid pickling was 2 mm.
In the rolling procedure, an A1 type curve is adopted, the reduction amplitude of two side edges is reduced by 50%, and the coefficient of a curve in the middle is 0.
The cold-hard coil annealing is a continuous annealing process, the cold-hard coil annealing process is a 2.5 mm-thick plate strip, the cold-rolling annealing temperature is 1080 ℃, and the cold-hard coil annealing process is divided into 2 preheating zones, 6 heating zones and 2 heat preservation zones for continuous annealing.
The oxygen content of 3.5% was selected for cold-coil annealing.
And after the cold hard coil is annealed, a neutral salt electrolysis and mixed acid (nitric acid and hydrofluoric acid) pickling process is adopted. Na (Na)2SO4The concentration was 150 g/l. Na (Na)2SO4The solution temperature was 75 ℃.
HNO in cold-hard coil mixed acid pickling process3The concentration was 110g/l and the HF concentration was 15 g/l. The mixed acid temperature is 50 ℃.
The temper rolling elongation after cold rolling annealing was 0.6%, temper rolling tension was controlled at 130KN, and rolling force was 2100 KN.
Comparative example 1
The present comparative example provides a general austenitic stainless steel, which comprises 0.059% of carbon, 0.456% of silicon, 1.168% of manganese, 0.041% of phosphorus, 0.003% of sulfur, 18.109% of chromium, 8.113% of nickel, 0.202% of copper, and the balance of iron, based on the total weight of the austenitic stainless steel.
The austenitic stainless steel is manufactured by the following method: smelting and making steel from various raw materials of the austenitic stainless steel, and then sequentially carrying out hot rolling, hot rolling annealing pickling, rolling, cold hard coil annealing pickling and finishing on an obtained raw material blank.
The hot-rolled black strip steel coil is continuously annealed at 930-1160 ℃, the temperature of the first preheating region is 960 ℃, the temperature of the first heating region to the fifth heating region is 1165 ℃, and the temperature of the first heat preservation region is 1160 ℃.
The oxygen content in the annealing was taken to be 7%.
After annealing, rapid water cooling is adopted, and the water cooling flow rate is 30m3H, cooling time 40 s.
The pickling of the hot-rolled black strip coil after annealing adopts a sulfuric acid + mixed acid (nitric acid + hydrofluoric acid) pickling process. Qualified sulfuric acid with the mass fraction of 98% is adopted for sulfuric acid pickling, wherein the mass fraction of ash is not more than 0.10%, and the mass fraction of arsenic is not more than 0.01%.
H in sulfuric acid pickling2SO4Acid washing concentration is 100g/l, H2SO4The pickling temperature is 60 ℃.
The nitric acid is 65% nitric acid in mass fraction in the mixed acid pickling of nitric acid and hydrofluoric acid. The hydrofluoric acid is 55% by mass.
HNO in mixed acid pickling of nitric acid and hydrofluoric acid3The concentration was 80g/l and the HF concentration was 10 g/l. The acid pickling temperature was 40 ℃.
The brushing after the sulfuric acid pickling is performed by using PP bristles, and the brushing after the mixed acid pickling is performed by using the PP bristles.
The brushing reduction after sulfuric acid pickling was 5mm, and the brushing reduction after mixed acid pickling was 1 mm.
In the rolling procedure, an A1 type curve is adopted, the reduction amplitude of two side edges is reduced by 50%, and the coefficient of a curve in the middle is 0.
The cold-hard coil annealing is a continuous annealing process, the implementation is a 2.5 mm-thick plate strip, the cold-rolling annealing temperature is 1170 ℃, and the continuous annealing is carried out in 2 preheating zones, 6 heating zones and 2 heat preservation zones.
The oxygen content of 4.5% was selected for cold-coil annealing.
And after the cold hard coil is annealed, a neutral salt electrolysis and mixed acid (nitric acid and hydrofluoric acid) pickling process is adopted. Na (Na)2SO4The concentration was 100 g/l. Na (Na)2SO4The temperature of the solution was 60 ℃.
HNO in cold-hard coil mixed acid pickling process3The concentration was 30g/l and the HF concentration was 2 g/l. The mixed acid temperature is 40 ℃.
The temper rolling elongation after cold rolling and annealing was 0.7%, the temper rolling tension was controlled at 140KN, and the rolling force was 2150 KN.
Test example
The stainless steel products provided in example 1 and comparative example 2 were compared in terms of mechanical properties and corrosion resistance as follows.
Procedure for evaluating mechanical properties of examples 1 and 2 and comparative examples 1 and 2
Randomly taking 300-300 mm samples from the steel coil subjected to finishing operation, and carrying out strength performance test on the samples according to GB/T3280-2015 stainless steel cold-rolled steel sheets and steel strips; and carrying out surface hardness performance test according to GB/T4340.1 metal Vickers hardness test.
The test results are shown in table 1.
As can be seen from Table 1, the austenitic stainless steel provided in example 1 of the present invention has superior tensile strength, yield strength and HV hardness as compared with comparative example 1, wherein the tensile strength is improved by 63N/mm2, the yield strength is improved by 84N/mm2, and the hardness HV is improved by 15N/mm 2.
Procedure for evaluating corrosion resistance of example 1 and comparative example 1
And (3) randomly taking 400 x 400mm samples from the steel coil subjected to annealing, pickling and washing and washed by the hot rolled steel coil and the steel coil subjected to finishing operation, and carrying out corrosion resistance test according to GB/T10125 artificial atmosphere corrosion test-salt spray test. Taking an average value of each test result; and taking the average result of a plurality of test rolls as the total test result.
The test results are shown in table 2.
The salt spray test is to simulate the surface rusting and corroding area condition of a material in a salt spray environment in a laboratory, and the corrosion resistance rating is carried out according to the rusting and corroding area. The lowest grade 0 and the highest grade 10, the higher the grade number, the better the corrosion resistance. As can be seen from Table 2, the corrosion resistance of the austenitic stainless steel suitable for manufacturing doors and windows provided by the example 1 of the present invention is better than that of the stainless steel product provided by the comparative example 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. High strength high rigidity corrosion-resistant austenite stainless steel for door and window, its characterized in that: comprises the following raw materials, wherein the raw materials comprise less than 0.08% of carbon, less than 1.00% of silicon, less than 2.00% of manganese, less than 0.035% of phosphorus, less than 0.003% of sulfur, 18.00-20.00% of chromium, 8.00-10.05% of nickel, less than 0.04% of copper and the balance of iron.
2. The method for manufacturing the austenitic stainless steel for high strength, high hardness and corrosion resistance doors and windows according to claim 1, wherein: the method comprises the following steps:
s1, smelting the raw materials of the austenitic stainless steel to form a billet through continuous casting;
s2, sequentially carrying out hot rolling process, hot rolled steel coil annealing process, pickling process, rolling process, cold hard coil annealing pickling process and finishing process on the obtained steel billet to obtain a stainless steel plate strip product;
and S3, sequentially carrying out mechanical property detection and neutral salt spray test on the stainless steel plate strip product in the step S2 to obtain the austenitic stainless steel which is suitable for producing high-strength, high-hardness and corrosion-resistant.
3. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 2, wherein: the hot-rolled steel coil annealing process in the step S2 adopts a rapid water cooling mode, and the water cooling flow is 60-80m3The cooling time is 10-20s, and the temperature of the hot rolled steel coil annealing process is increased by 10-30 ℃ compared with that of the common material.
4. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 2, wherein: the oxygen content of the hot-rolled steel coil annealing process in the step S2 is 5%, and the oxygen content of the cold hard coil annealing and pickling process is 3.5%.
5. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 2, wherein: the acid cleaning process in the step S2 comprises a sulfuric acid cleaning process, a first scrubbing process, a mixed acid cleaning process and a second scrubbing process which are sequentially processed, wherein the sulfuric acid mass fraction of the sulfuric acid cleaning process is 98%, the sulfuric acid cleaning concentration is 230-300 g/l, the sulfuric acid cleaning temperature is 70-80 ℃, and the mixed acid cleaning temperature range of the mixed acid cleaning process is 45-60 ℃.
6. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 5, wherein the method comprises the following steps: the sulfuric acid consists of ash, arsenic, lead and mercury, wherein the mass fraction of the ash is not more than 0.02%, the mass fraction of iron is not more than 0.005%, the mass fraction of arsenic is not more than 0.0001%, the mass fraction of lead is not more than 0.005%, the mass fraction of mercury is not more than 0.001%, and the transparency is not less than 80 mm.
7. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 5, wherein the method comprises the following steps: the mixed acid comprises 65% of nitric acid and 55% of hydrofluoric acid by mass, the concentration range of the nitric acid is 110-160 g/l, and the concentration range of the hydrofluoric acid is 10-30 g/l.
8. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 5, wherein the method comprises the following steps: the bristles of the first brushing process are made of SiC, the brushing reduction is 3mm, the bristles of the second brushing process are made of PP, and the brushing reduction is 2 mm.
9. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 2, wherein: the annealing and pickling process of the cold hard coil in the step S2 comprises a neutral salt electrolytic pickling process and a mixed acid pickling process of the cold hard coil, wherein the concentration of sodium sulfate in the neutral salt electrolytic pickling process is 100-250g/l, and the temperature of the sodium sulfate is 70-85 ℃.
10. The method for manufacturing the austenitic stainless steel for high-strength, high-hardness and corrosion-resistant doors and windows according to claim 2, wherein: the tensile strength detected in the step S3 is 900MPa, the yield strength is 400MPa, and the HV hardness is 220 MPa, 700 MPa and 300 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110673771.7A CN113481432A (en) | 2021-06-17 | 2021-06-17 | High-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110673771.7A CN113481432A (en) | 2021-06-17 | 2021-06-17 | High-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113481432A true CN113481432A (en) | 2021-10-08 |
Family
ID=77935507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110673771.7A Pending CN113481432A (en) | 2021-06-17 | 2021-06-17 | High-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113481432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894163A (en) * | 2021-10-20 | 2022-01-07 | 江苏甬金金属科技有限公司 | Cold rolling process of wide ultrathin stainless steel band |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925649A (en) * | 2012-11-30 | 2013-02-13 | 张家港浦项不锈钢有限公司 | Manufacture method of austenitic stainless steel with good polishing performance |
| CN105734455A (en) * | 2016-03-25 | 2016-07-06 | 张家港浦项不锈钢有限公司 | Austenitic stainless steel applicable to production of beer barrels and manufacturing method and application thereof |
| CN106591741A (en) * | 2017-01-06 | 2017-04-26 | 山西太钢不锈钢股份有限公司 | Non-annealing rolling method for medium-chromium austenitic stainless steel |
| CN107142513A (en) * | 2017-05-09 | 2017-09-08 | 张家港浦项不锈钢有限公司 | High chrome high-nickel stainless-steel cold-rolling annealing and pickling technique |
| CN107641698A (en) * | 2016-07-22 | 2018-01-30 | 宝钢特钢有限公司 | The manufacture method of super austenitic stainless steel cold-rolled strip |
-
2021
- 2021-06-17 CN CN202110673771.7A patent/CN113481432A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925649A (en) * | 2012-11-30 | 2013-02-13 | 张家港浦项不锈钢有限公司 | Manufacture method of austenitic stainless steel with good polishing performance |
| CN105734455A (en) * | 2016-03-25 | 2016-07-06 | 张家港浦项不锈钢有限公司 | Austenitic stainless steel applicable to production of beer barrels and manufacturing method and application thereof |
| CN107641698A (en) * | 2016-07-22 | 2018-01-30 | 宝钢特钢有限公司 | The manufacture method of super austenitic stainless steel cold-rolled strip |
| CN106591741A (en) * | 2017-01-06 | 2017-04-26 | 山西太钢不锈钢股份有限公司 | Non-annealing rolling method for medium-chromium austenitic stainless steel |
| CN107142513A (en) * | 2017-05-09 | 2017-09-08 | 张家港浦项不锈钢有限公司 | High chrome high-nickel stainless-steel cold-rolling annealing and pickling technique |
Non-Patent Citations (1)
| Title |
|---|
| 兰纳伯格等: "《钒在微合金钢中的作用》", 31 October 2015, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894163A (en) * | 2021-10-20 | 2022-01-07 | 江苏甬金金属科技有限公司 | Cold rolling process of wide ultrathin stainless steel band |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4624473B2 (en) | High purity ferritic stainless steel with excellent weather resistance and method for producing the same | |
| CN103276307B (en) | A kind of highly corrosion resistant high ductility high chromium ferritic stainless steel steel plate and its manufacture method | |
| ES2802677T3 (en) | High purity ferritic stainless steel sheet with excellent corrosion resistance and anti-reflective property | |
| CN101775635B (en) | Treatment process of stainless steel cold-rolled sheet | |
| JP5962541B2 (en) | Manufacturing method of high-strength steel sheet | |
| KR101839280B1 (en) | Separator for solid polymer type fuel cell and manufacturing method thereof | |
| CN106319391A (en) | Acid rain corrosion-resistant austenitic stainless steel and manufacturing method thereof | |
| JP5609494B2 (en) | High strength steel plate and manufacturing method thereof | |
| CN113481432A (en) | High-strength high-hardness corrosion-resistant austenitic stainless steel for doors and windows and manufacturing method thereof | |
| CN113564481A (en) | Low-cost sulfate acid dew point corrosion resistant steel plate and manufacturing method thereof | |
| CN113444980A (en) | Resource-saving 290 MPa-level steel plate for building anti-seismic energy dissipation structure and manufacturing and application thereof | |
| JP5962540B2 (en) | Manufacturing method of high-strength steel sheet | |
| JP2013122074A (en) | High-strength steel sheet and method of producing the same | |
| JP5834870B2 (en) | High strength steel plate and manufacturing method thereof | |
| JP2013124382A (en) | High-strength steel sheet excellent in chemical treating properties and manufacturing method therefor | |
| JP5794284B2 (en) | Manufacturing method of high-strength steel sheet | |
| CN110404997A (en) | A kind of cold-rolled strip manufacturing method of corrosion resistant alloy-UNS N10276 | |
| KR101145601B1 (en) | A descaling method for austenite stainless steel | |
| JPH0558080B2 (en) | ||
| CN112139244A (en) | Rolling method for eliminating surface oxygen spot defect of hot-rolled and acid-washed enameled steel plate | |
| JP2702371B2 (en) | Manufacturing method of exterior stainless steel sheet having anti-glare property and corrosion resistance | |
| JPH01123098A (en) | Production of ferrite stainless steel sheet | |
| JP5712541B2 (en) | High strength steel plate and manufacturing method thereof | |
| CN111575466B (en) | Heat treatment preparation method of heat-strength corrosion-resistant steel | |
| JP2588336B2 (en) | Manufacturing method of exterior stainless steel sheet having anti-glare property and corrosion resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211008 |
|
| RJ01 | Rejection of invention patent application after publication |