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Ferrite-series stainless steeel cold-rolled steel plate and manufacturing method thereof

A technology of cold-rolled steel plate and manufacturing method, which is applied in the field of ferritic stainless steel cold-rolled steel plate and its manufacture, and can solve the problems such as the reduction of the appearance of the steel plate surface

Pending Publication Date: 2019-07-12
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this surface peeling phenomenon, micro unevenness is formed on the surface, and diffuse reflection of light occurs at this portion, which reduces the aesthetics of the light reflection on the surface of the steel sheet.

Method used

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  • Ferrite-series stainless steeel cold-rolled steel plate and manufacturing method thereof
  • Ferrite-series stainless steeel cold-rolled steel plate and manufacturing method thereof
  • Ferrite-series stainless steeel cold-rolled steel plate and manufacturing method thereof

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Embodiment

[0166] Molten steel with the composition shown in Table 1 (the balance is Fe and unavoidable impurities) was smelted by refining using a converter with a capacity of 150 tons and a vacuum oxygen decarburization (VOD) method, and then, by continuous Casting is made into a billet with a width of 1000 mm and a thickness of 200 mm.

[0167] After heating this billet at 1200° C. for 1 hour, seven passes of rough rolling using a reversing rolling mill consisting of three stands and seven passes of rough rolling using a one-way rolling mill consisting of seven stands were carried out. The finish rolling of the substructure is hot rolling, and a coiling treatment is performed at about 750° C. to obtain a hot-rolled steel sheet having a thickness of about 5.0 mm.

[0168] Next, these hot-rolled steel sheets were subjected to hot-rolled sheet annealing using a box annealing method under the conditions shown in Table 2 to produce hot-rolled annealed steel sheets, and then the surface of ...

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Abstract

The invention provides a ferrite-series stainless steel cold-rolled steel plate and a manufacturing method thereof, wherein the ferrite-series stainless steel cold-rolled steel plate has advantages ofsufficient corrosion resistance, sufficient suppression of metal powder defects and excellent surface appearance. According to the manufacturing method of the ferrite-series stainless steel cold-rolled steel plate, hot rolling is performed on a steel raw material with specified components for manufacturing a hot-rolled steel plate; hot-rolled plate annealing, shot blasting processing and acid pickling are successively performed on the hot-rolled steel plate; and then cold rolling and cold-rolled plate annealing are performed. In the manufacturing method, the heating temperature in hot-rolledsteel plate annealing is set to 800-900 DEG C; the keeping time is set to 1-24 hours; collosion energy in shot blasting processing is set to 10-40kJ / m<2>; and furthermore the average particle diameterof the shot blasting particles in shot blasting processing is set to 0.2-1.0mm; and the hardness is set to HV350-550 according to a Vickers hardness tester.

Description

technical field [0001] The present invention relates to a ferritic stainless steel cold-rolled steel sheet having sufficient corrosion resistance and good surface appearance, and a method for producing the same. Background technique [0002] Japanese Industrial Standard: SUS430 (16-18 mass% Cr steel) specified in JIS G 4305 is cheap and has excellent corrosion resistance among ferritic stainless steel cold-rolled steel sheets, so it is used in various types of building materials, home appliances, kitchen utensils, etc. in use. [0003] For steel sheets used in these applications, in addition to formability that can be processed into a predetermined shape by press forming, sufficient corrosion resistance, good surface gloss and surface texture are required (hereinafter, they are also collectively referred to as surface aesthetics). [0004] In particular, in recent years, there have been many products utilizing the metallic luster of stainless steel as a raw material. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/40C21D8/02C21D7/06
CPCC22C38/02C22C38/04C22C38/06C22C38/40C22C38/001C21D8/0226C21D8/0236C21D8/0247C21D7/06C21D2211/005
Inventor 吉野正崇
Owner JFE STEEL CORP
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