CN115287430A - Preparation method of 304 austenitic stainless steel for household appliance panel - Google Patents
Preparation method of 304 austenitic stainless steel for household appliance panel Download PDFInfo
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- CN115287430A CN115287430A CN202210931917.8A CN202210931917A CN115287430A CN 115287430 A CN115287430 A CN 115287430A CN 202210931917 A CN202210931917 A CN 202210931917A CN 115287430 A CN115287430 A CN 115287430A
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- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 30
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 21
- 239000010935 stainless steel Substances 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 238000005554 pickling Methods 0.000 claims abstract description 14
- 238000005498 polishing Methods 0.000 claims abstract description 10
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000005097 cold rolling Methods 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000002161 passivation Methods 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000009962 finishing (textile) Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims 6
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 4
- 239000002932 luster Substances 0.000 description 4
- 238000009837 dry grinding Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- 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
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/085—Iron or steel solutions containing HNO3
Abstract
The invention discloses 304 austenitic stainless steel for a household appliance panel and a preparation method thereof, and is characterized by comprising the following process flow steps: 1) Annealing and pickling the stainless steel black skin hot coil; 2) Cold rolling of stainless steel; 3) Annealing, pickling and passivating the stainless steel cold coil; 4) Non-polishing and grinding: 5) Finely grinding the non-woven fabric; 6) Leveling; 7) And (6) stretch bending and straightening. The roughness of the steel coil prepared by the invention is as follows: the vertical direction Ra is controlled to be 0.5 +/-0.2 mu m, and the vertical direction Rz is controlled to be 3.5 +/-1 mu m; the glossiness of the prepared steel coil is as follows: the 60-degree parallel direction is controlled to be 250 +/-50gu, and the 60-degree vertical direction is controlled to be 70 +/-30 gu.
Description
Technical Field
The invention belongs to the technical field of stainless steel processing, and particularly relates to 304 austenitic stainless steel for a household appliance panel and a preparation scheme thereof.
Background
In order to obtain clear, stable and strong stereoscopic patterns, natural surface color and luster and metallic luster, the panel of the household appliance needs a stainless steel grinding product with special grains.
The manufacturing process for conventional abrasive surface products is: after a series of cold rolling processes, the product is prepared by using a dry grinding wire drawing machine or an emulsion grinding wire drawing machine. The product produced by the process has the problems of large glossiness difference, white surface, poor stereoscopic impression and the like, and can not meet the requirements of high-end users.
In order to solve the problems of conventional abrasive surface products and fully meet the user requirements, the process of the existing abrasive product needs to be improved creatively.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of an austenitic stainless steel product with better glossiness and a discontinuous rough surface.
The technical scheme adopted by the invention for solving the technical problems is as follows: a304 austenitic stainless steel for a household appliance panel and a preparation scheme thereof are characterized by comprising the following process flow steps:
1) Annealing and pickling the stainless steel black skin hot coil: the annealing temperature is 1050-1120 ℃, a two-step process of hot sulfuric acid, HNO3 and HF mixed acid is adopted, acid pickling dephosphorization is carried out on the annealed black skin coil, the concentration of H2S04 is 200-300 g/L, and the temperature is 65-80 ℃; the HNO3 concentration is 110-160 g/L, and the HF concentration is 22-40 g/L;
2) Cold rolling of stainless steel;
3) Annealing, pickling and passivating the stainless steel cold coil: the annealing temperature is 1050-1120 ℃, mixed acid of HNO3 and HF is adopted to carry out acid pickling passivation on the annealed steel coil, the concentration of HNO3 is 80-150 g/L, and the concentration of HF is 10-25 g/L;
4) Non-polishing and grinding: the specific process is shown in Table 1;
TABLE 1 non-polishing grinding process of the invention
5) Finishing and grinding the non-woven fabric;
6) Leveling;
7) And (4) bending and straightening to prepare the steel coil.
Preferably, the stainless steel in the step 2) is cold-rolled, the rolling reduction rate is 50-70%, and the stainless steel is rolled to different required thicknesses; the rolling force is controlled below 800 tons, the rolling speed is controlled between 300 and 400m/min, the oil pressure is controlled between 6000 and 8000l/min, the rolling pass arrangement follows that the thickness reduction of a base material is not more than 0.8mm in the first pass of rolling, the combination of the working rolls is matched according to F-G-H, namely, the former three passes use an F type roll with the roughness Ra of 0.5 to 0.8um, the middle passes use a G type roll with the roughness Ra of 0.3 to 0.5um, and the last 1 to 2 passes use an H type roll with the roughness Ra of 0.1 to 0.3 um.
Preferably, the non-polishing grinding amount in the step 4) is 5-7 um of single-side metal loss.
Preferably, the rotation speed of the non-woven fabric finishing and grinding abrasive belt machine in the step 5) is 1000-1800r/min, and the grinding speed is controlled at 25-30m/min.
Preferably, the two-roller reversible temper mill is adopted for the flattening in the step 6), the diameter of a working roller is 790-860 mm, the working roller is combined according to the convexity of 150um of the upper roller and the convexity of 120um of the lower roller, the maximum rolling force cannot exceed 1200 tons, the speed is 250-300 m/min, and the rolling pass is 1 pass.
Preferably, the grinding media used in the steps 4) and 5) are pure oil.
Preferably, the roughness of the prepared steel coil is as follows: the vertical direction Ra is controlled to be 0.5 + -0.2 μm, and the vertical direction Rz is controlled to be 3.5 + -1 μm.
Preferably, the gloss of the prepared steel coil is as follows: the 60-degree parallel direction is controlled to be 250 +/-50gu, and the 60-degree vertical direction is controlled to be 70 +/-30 gu.
Preferably, the austenitic stainless steel of the present invention comprises the following components in percentage by mass: less than or equal to 0.07wt%, less than or equal to 1.0wt% Si, less than or equal to 2.0wt% Mn, less than or equal to 0.045wt% P, less than or equal to 0.030wt% S, ni:8.00 to 10.50wt%, cr: 18.00-20.00 wt%, and the balance of Fe and inevitable impurities.
Preferably, the tensile strength of the prepared steel coil is more than or equal to 520MPa, the yield strength is more than or equal to 205MPa, and the elongation is more than or equal to 40%.
Compared with the prior art, the invention has the advantages that:
the invention adopts the non-polishing grinding and non-woven fabric finish machining grinding process, and ensures the glossiness of the product while obtaining deep lines and high stereoscopic impression; in the prior art, a single dry grinding or emulsion grinding technology is adopted, the obtained product cannot give consideration to grains and glossiness, so that the user experience is reduced, and the method is only suitable for low-end household appliance surface products.
The grinding medium adopts a pure oil grinding process, so that the product surface has strong stereoscopic impression and no color difference; the prior art adopts a dry grinding or emulsion grinding process for the grinding medium, so that the product has whitish surface, poorer stereoscopic impression and obvious chromatic aberration.
According to the invention, the grinding amount of single-sided metal loss reaches 6um, and the product prepared by the method has clear and stable grinding lines, natural color and luster and metallic luster; in the prior art, the grinding amount of single-sided metal is only 1-2 um, and the prepared product has shallow lines and distorted color.
The roughness of the steel coil prepared by the invention is as follows: the Ra in the vertical direction is controlled to be 0.5 +/-0.2 mu m, and the Rz in the vertical direction is controlled to be 3.5 +/-1 mu m; the roughness of the steel coil prepared by the prior art is as follows: the vertical direction Ra is controlled to be 0.3 +/-0.2 mu m, and the vertical direction Rz is controlled to be 2.0 +/-1 mu m;
the glossiness of the steel coil prepared by the invention is as follows: the 60-degree parallel direction is controlled to be 250 +/-50gu, and the 60-degree vertical direction is controlled to be 70 +/-30 gu; the glossiness of a steel coil prepared by the prior art is as follows: the 60-degree parallel direction is controlled to be 200 +/-50gu, and the 60-degree vertical direction is controlled to be 50 +/-30 gu.
The tensile strength of the steel coil prepared by the method is more than or equal to 520MPa, the yield strength is more than or equal to 205MPa, and the elongation is more than or equal to 40%.
Drawings
FIG. 1 is a schematic surface view of a sub-product of the present embodiment;
FIG. 2 is a schematic surface view of a comparative example;
Detailed Description
The present invention will be described in further detail with reference to examples.
Examples 1 to 5 are 304 austenitic stainless steel products for household electrical appliance panels prepared by the method of the present invention, the specific composition is shown in table 2,
TABLE 2 chemical composition in wt% of inventive example
| Trade mark | C | Si | Mn | P | S | Ni | Cr | N | Fe |
| Examples | 0.047 | 0.42 | 1.08 | 0.033 | 0.003 | 8.14 | 18.16 | 0.037 | Balance of |
The method comprises the following process flow steps:
1) Annealing and pickling the stainless steel black skin hot coil: annealing and pickling a stainless steel black skin hot coil, wherein the stainless steel has the specification of 3.0mm in thickness and 1250mm in width; the annealing temperature is 1050-1120 ℃, and hot sulfuric acid and HNO are adopted 3 And HF mixed acid' two-step process, namely performing acid pickling dephosphorization on the annealed black skin coil, namely performing acid pickling twice by respectively using hot sulfuric acid and HNO 3 HF mixed acid, the process speed is controlled to be 60-70 m/min, and the H is 2 S0 4 The concentration is 200-300 g/L, and the temperature is 65-80 ℃; the HNO3 concentration is 110-160 g/L, and the HF concentration is 22-40 g/L;
2) Cold rolling of stainless steel: rolling the stainless steel to different required thicknesses with the rolling reduction rate of 50-70%; the rolling force is controlled below 800 tons, the rolling speed is controlled between 300 and 400m/min, the oil pressure is controlled between 6000 and 8000l/min, the rolling pass arrangement follows that the thickness reduction of a base material in the first pass is not more than 0.8mm, the working roll combination is matched according to F-G-H, namely, the former three passes use an F type roll with the roughness Ra between 0.5 and 0.8um, the middle passes use a G type roll with the roughness Ra between 0.3 and 0.5um, and the last 1 to 2 passes use an H type roll with the roughness Ra between 0.1 and 0.3 um;
3) Stainless steelCold coil annealing, pickling and passivating: the mechanical property of the product is improved, and the surface of the product is passivated; the annealing temperature is 1050-1120 ℃, HNO is adopted 3 The mixed acid of HF and HF carries out acid cleaning passivation on the annealed steel coil, the process speed is controlled to be 70-80 m/min, and the HNO 3 The concentration is 80-150 g/L, and the concentration of HF is 10-25 g/L;
4) Polishing and grinding are not carried out: grinding the surface of the steel coil by using a grinding abrasive belt with a certain granularity to obtain required grains; the non-polishing grinding amount is that the single-side metal loss is controlled to be 5-7 um, preferably 6um, and the specific process is shown in Table 3;
TABLE 3 non-polishing grinding process of the invention
This example was prepared using a six stand continuous mill.
5) Finishing and grinding the non-woven fabric: obtaining better glossiness; the processing adopts the processing of a Hermeis non-woven fabric grinding belt, the rotating speed of the belt sander is 1000-1800r/min, and the grinding speed is controlled at 25-30m/min.
6) Leveling: obtaining better glossiness and flatness; the method adopts a two-roller reversible temper mill for processing, the roller diameter of a working roller is 790-860 mm, the working roller is combined according to the convexity of 150um of the upper roller and the convexity of 120um of the lower roller, the maximum rolling force cannot exceed 1200 tons, the speed is 250-300 m/min, and the rolling pass is 1 pass.
7) Stretch bending and straightening: after stretch bending and straightening, the plate shape is improved, and the edge wave is less than or equal to 5mm.
The ingredients of the comparative example were the same as in this example, and the final stainless steel mill product was prepared using an emulsion milling process.
The comparison of the key process parameter control and the performance of the two are shown in the table 4 and the table 5.
Table 4 key process parameter control for embodiments of the invention
TABLE 5 Properties of inventive and comparative examples
As can be seen by comparing the examples with the comparative examples: the embodiment has larger roughness, which shows that the texture is deeper and has more stereoscopic impression, and the glossiness is higher than that of the comparative example under the condition that the roughness of the embodiment is obviously larger than that of the comparative example, which shows that the embodiment has both high glossiness and deep texture.
Claims (9)
1. A preparation method of 304 austenitic stainless steel for household appliance panels is characterized by comprising the following process flow steps:
1) Annealing and pickling the stainless steel black skin hot coil: the annealing temperature is 1050-1120 ℃, and hot sulfuric acid and HNO are adopted 3 And an HF mixed acid two-step process, wherein the annealed black skin coil is subjected to acid pickling dephosphorization, and H is 2 S0 4 The concentration is 200-300 g/L, and the temperature is 65-80 ℃; the concentration of HNO3 is 110-160 g/L, and the concentration of HF is 22-40 g/L;
2) Cold rolling of stainless steel:
3) Annealing, pickling and passivating the stainless steel cold coil: the annealing temperature is 1050-1120 ℃, HNO is adopted 3 And carrying out acid cleaning passivation on the annealed steel coil by using mixed acid of HF (hydrogen fluoride) and HNO (hydrogen fluoride) 3 The concentration is 80-150 g/L, and the concentration of HF is 10-25 g/L;
4) Non-polishing and grinding: the grinding belts of the 1# to 6# frames of the grinding machine are configured to be 120# to 320# for the 1# to 2# frames, 150# to 320# for the 3# to 5# frames and 20-50min for the 6# frames; the rotating speed of the frame is 1# -5 # frame adopting 1400-1600 r/min, and 6# frame adopting 900-1100 r/min; the frame current is 70-90A; the grinding speed is 25-30m/min;
5) Finishing and grinding the non-woven fabric;
6) Leveling;
7) And (4) bending and straightening to prepare the steel coil.
2. The method of manufacturing a 304 austenitic stainless steel for a household electrical appliance panel, according to claim 1, wherein: the stainless steel in the step 2) is cold-rolled, the rolling reduction rate is 50-70%, and the stainless steel is rolled to different required thicknesses; the rolling force is controlled below 800 tons, the rolling speed is controlled between 300 and 400m/min, the oil pressure is controlled between 6000 and 8000l/min, the reduction of the thickness of the base material in the first pass is not more than 0.8mm according to the arrangement of rolling passes, the combination of the working rolls is matched according to F-G-H, namely, the former three passes use the F type roll with the roughness Ra between 0.5 and 0.8um, the middle passes use the G type roll with the roughness Ra between 0.3 and 0.5um, and the last 1 to 2 passes use the H type roll with the roughness Ra between 0.1 and 0.3 um.
3. The method of manufacturing a 304 austenitic stainless steel for a household electrical appliance panel, according to claim 1, wherein: the non-polishing grinding amount in the step 4) is 5-7 um of single-side metal loss.
4. The method of manufacturing a 304 austenitic stainless steel for a household electrical appliance panel according to claim 1, wherein: and 5) the rotating speed of the non-woven fabric finishing and grinding abrasive belt machine in the step 5) is 1000-1800r/min, and the grinding speed is controlled at 25-30m/min.
5. The method of manufacturing a 304 austenitic stainless steel for a household electrical appliance panel according to claim 1, wherein: and 6) flattening by adopting a two-roller reversible flattening machine for machining, wherein the diameter of a working roller is 790-860 mm, the working roller is combined according to the convexity of 150um of the upper roller and the convexity of 120um of the lower roller, the maximum rolling force cannot exceed 1200 tons, the speed is 250-300 m/min, and the rolling pass is 1 pass.
6. The method of manufacturing a 304 austenitic stainless steel for a household electrical appliance panel according to claim 1, wherein: pure oil is used as the grinding medium in the steps 4) and 5).
7. The method for preparing a 304 austenitic stainless steel for household electrical appliance panels as claimed in any one of claims 1 to 6, wherein: the roughness of the prepared steel coil is controlled to be 0.5 +/-0.2 mu m in the vertical direction Ra and 3.5 +/-1 mu m in the vertical direction Rz; the glossiness of the prepared steel coil is controlled to be 250 +/-50gu in the 60-degree parallel direction and 70 +/-30 gu in the 60-degree vertical direction.
8. A method for preparing 304 austenitic stainless steel for household electrical appliance panels as claimed in any of claims 1 to 6, wherein the austenitic stainless steel comprises the following components by weight percentage: less than or equal to 0.07wt% of C, less than or equal to 1.0wt% of Si, less than or equal to 2.0wt% of Mn, less than or equal to 0.045wt% of P, less than or equal to 0.030wt% of S, ni:8.00 to 10.50wt%, cr: 18.00-20.00 wt%, and the balance of Fe and inevitable impurities.
9. The method for preparing 304 austenitic stainless steel for household appliance panels as claimed in any one of claims 1 to 6, wherein the prepared steel coil has tensile strength of 520MPa or more, yield strength of 205MPa or more and elongation of 40% or more.
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| CN103831627A (en) * | 2014-03-05 | 2014-06-04 | 山西太钢不锈钢股份有限公司 | Method for lowering surface roughness of cold-rolled nickel stainless steel bright plate |
| CN106807751A (en) * | 2016-12-27 | 2017-06-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of cold-rolling process for decorating 304 stainless steel 2B base-materials of panel |
| CN111593302A (en) * | 2020-06-01 | 2020-08-28 | 肇庆宏旺金属实业有限公司 | Method for processing stainless steel coil with colored frosted film layer |
| CN111663111A (en) * | 2020-06-01 | 2020-09-15 | 肇庆宏旺金属实业有限公司 | Method for processing stainless steel coil with colorful snowflake sand wire drawing film layer |
| CN112276480A (en) * | 2020-09-18 | 2021-01-29 | 山东宏旺实业有限公司 | Preparation method of snowflake sand rose gold fingerprint-resistant stainless steel coil |
| CN114645194A (en) * | 2022-02-17 | 2022-06-21 | 宁波宝新不锈钢有限公司 | Preparation method of high-corrosion-resistance ferritic stainless steel |
| CN114653773A (en) * | 2022-03-15 | 2022-06-24 | 宁波宝新不锈钢有限公司 | Processing method of stainless steel grinding product for rail transit carrier |
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