Manufacturing method of cold-rolled SUS304 two-sided bright-annealed (BA) surface stainless steel

Abstract

Provided is a manufacturing method of cold-rolled SUS304 two-sided bright-annealed (BA) surface stainless steel. The manufacturing method comprises the steps that a black rust hot roll is subjected toannealing and acid pickling; a multi-roller rolling machine carries out rough rolling, specifically, the reduction rate of rough rolling is controlled to be 10%-30%; a plurality of grinding racks areadopted to grind the upper surface and the lower surface of a rough-rolled steel plate; the multi-roller rolling machine carries out finish rolling, specifically, the steel plate is rolled to have the needed thickness; bright annealing is carried out under the whole hydrogen protective atmosphere, specifically, the annealing temperature is 1020-1140 DEG C; and after annealing under the whole hydrogen protective atmosphere is completed, modulation treatment is carried out through a leveling roller, the plate shape is adjusted, and surface glossiness of the product is improved. According to themanufacturing method, the process is reasonable, fine surface quality of the SUS304 BA product is ensured through range control of shot blasting process parameters, the ratio of abrasive belts of thegrinding process and surface control over the rollers of the rolling machine; it is ensured that the obverse side and the reverse side of the steel plate have the coincident resolution by carrying out rough grinding and finish rolling on the both sides; scratch defects of the reverse side are controlled through selection or protection of a plate shape roll of the rolling machine; and as for the prepared two-sided BA surface stainless steel, the obverse side and the reverse side have less defects and the coincident glossiness, and the two-sided BA surface stainless steel has broad applicationprospects.

Description

technical field [0001] The invention belongs to the technical field of stainless steel production, and relates to a method for manufacturing a stainless steel cold-rolled sheet, in particular to a method for manufacturing a cold-rolled SUS304 double-sided BA surface stainless steel. Background technique [0002] SUS304 stainless steel can get good surface gloss through technological treatment, which is called BA product, which can be directly applied to the decoration industry. If it is polished in the later stage, it is easy to obtain high-quality mirror stainless steel, which can be used for high-end bathroom, Decoration industry such as elevators. [0003] Whether foreign or domestic, stainless steel manufacturers currently only produce single-sided BA products. This is because in the metallurgical production process, it is very difficult to ensure that the surface gloss of the front and back sides is at the same level. And because the reverse side of stainless steel is...

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Problems solved by technology

[0005] At present, there is no report on the preparation of stainless steel cold-rolled sheets with BA surfaces on the front and back sides

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