Process used for improving surface grade of 300-series stainless steel BA plate

Abstract

The invention discloses a process used for improving the surface grade of a 300-series stainless steel BA plate. The method includes the sequentially-executed steps that eleventhly, on a heat treatment line, low shot blasting, repainting and flattening processing are conducted on strip steel; twelfthly, acid cleaning is conducted on the strip steel; thirteenthly, 20%-30% of pre-rolling is conducted on the strip steel through a rolling mill; fourtheenthly, on a grinding unit, grinding is conducted on the strip steel through multiple different abrasive belts with the gradually-decreasing roughness in sequence; fifteenthly, multi-pass rolling is conducted on the strip steel, and the deformation amount of the last three passes is controlled to be within 18%; and sixteenthly, bright annealing treatment is conducted on the strip steel. According to the method for improving the surface grade of the 300-series stainless steel BA plate, by adopting the processing method of heat treatment, pre-rolling, different-roughness grinding, multi-pass rolling and bright annealing for the strip steel, the surface defect rate of the BA plate in the production process can be decreased, resolution, whitedimness and colorization of the surface of the strip steel are effectively improved, and therefore the surface grade of the BA plate is improved.

Description

technical field [0001] The invention relates to the technical field of stainless steel production, in particular to a process for improving the surface grade of 300 series stainless steel BA plates. Background technique [0002] 300 series stainless steel is an alloy material containing iron, carbon, nickel and chromium. It is a non-magnetic stainless steel material with better malleability and strong corrosion resistance. 304 stainless steel (0Cr18Ni9) is a very important and commonly used material in 300 series stainless steel, and 304 stainless steel BA (Bright Annealing) plate is a bright annealed plate. Existing stainless steel BA plates are obtained by applying bright annealing and smoothing to steel strips after cold rolling. The glossiness of BA board is mainly reflected in three aspects: resolution, white haze and coloring; among them, the main index is resolution. The resolution is the clarity of the image of the object on the surface of the strip, the better the...

AI Technical Summary

Problems solved by technology

At present, there is a large demand for high-end 304 stainless steel BA plates, and the requirements for the surface quality of BA plates are relatively high. Since the production process of 304 stainless steel BA plates is relatively complicated, the existing 304 stainless steel BA plates are produced using the production process. The surface quality of the 304BA board is poor, and the qualified rate of the BA board is low

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