Cold rolling process of 304 stainless steel 2B base material special for elevator decoration panel

Abstract

The invention particularly relates to a cold rolling process of a 304 stainless steel 2B base material special for an elevator decoration panel, raw material inclusion on the surface in the follow-up cold rolling process is improved by controlling raw material blank selection, roughness control and raw material component control, and in the cold rolling process, the reduction rate of the front pass of a rolling mill is limited, and the roughness of rollers of different rolling passes is changed; the surface roughness is controlled, white points generated after a finished product is ground due to uneven roughness of raw materials are improved, the cold rolling process, annealing temperature adjustment, grain crushing and grain uniformity recombination after rolling and H2SO4 and HF concentration optimization are combined, and the final 2B base material is low in surface roughness, extremely small in defect coverage rate, uniform and fine in strip steel surface and high in yield. The 304 stainless steel 2B plate with excellent grinding and polishing performance can directly replace a 304 stainless steel BA plate to be used as a decorative panel base material with high surface requirements, the production process is simpler than that of the 304 stainless steel BA plate, the production cost is reduced, and the machining efficiency is improved.

Description

technical field [0001] The invention specifically relates to a cold rolling process of 304 stainless steel 2B base material specially used for elevator decorative panels. Background technique [0002] Austenitic stainless steel 304 has the advantages of high plasticity, corrosion resistance, good welding performance, low temperature toughness and easy processing, etc., making it widely used in chemical, food, daily furniture decoration, architectural decoration and other fields. For example, 304 stainless steel base materials for high-end elevator panels are mostly processed with BA plates, but the production process of BA plates is complicated, requiring a special bright annealing furnace, and the production cost is high. 304 stainless steel 2B plates produced by ordinary processes need to be processed It can be used after deep processing and polishing, but after grinding and polishing, it is found that there are a lot of pitting and orange peel defects on the surface of th...

AI Technical Summary

Problems solved by technology

[0002] Austenitic stainless steel 304 has the advantages of high plasticity, corrosion resistance, good welding performance, low temperature toughness and easy processing, etc., making it widely used in chemical, food, daily furniture decoration, architectural decoration and other fields. For example, 304 stainless steel base materials for high-end elevator panels are mostly processed with BA plates, but the production process of BA plates is complicated, requiring a special bright annealing furnace, and the production cost is high. 304 stainless steel 2B plates produced by ordinary processes need to be processed It can be used after deep processing and polishing, but after grinding and polishing, it is found that there are a lot of pitting and orange peel defects on the surface of the mirror panel, which affects the surface quality of the mirror panel. Improve production efficiency, but also increase the corresponding production cost

[0003] At present, the decorative plate materials are mainly through the composition design and the pure steel smelting process in the molten steel smelting process, combined with the selection of raw materials to achieve the purpose of improving the purity of molten steel and reducing metallurgical defects, although the metallurgical defect is trachoma in the grinding and polishing process of austenitic stainless steel One aspect of pitting defects, but the above methods have not considered the impact of the change of the surface roughness of the cold-rolled strip on the grinding and polishing performance in the actual processing and production. Therefore, the cold-rolling process involved in the present invention is to improve the surface roughness of cold-rolled strip steel, so as to improve the grinding and polishing performance of the surface of austenitic stainless steel 2B

[0004] At present, 4-foot and narrower stainless steel strips are mainly used as elevator boards in the market. The cost of 4-foot materials is high in the production process, and the yield is low.