Method for producing cold-rolled stainless steel annealing and pickling brand steel

Abstract

The invention relates to a method for producing cold-rolled stainless steel annealing and pickling brand steel, comprising the following steps: (1) uncoiling and welding brand steels and then directly rolling the processed brand steels on two online six-high cluster mills without being lubricated, with the screw-down rate being 30-60%; (2) performing tension levelling and scale breaking on the brand steel, with the percentage of elongation being 2-7%; (3) performing shot blasting on the brand steels, wherein slurries formed by mixing water with abrasive materials are jetted in the shot blasting, and the30-40% abrasive materials are contained in the slurries; (4) using a scrubbing unit to grind and scrub the brand steel, wherein four pairs of grinding and scrubbing rollers are used for eliminating scales remaining on surfaces of the brand steels; (5) using two pairs of scrubbing rollers to polish and scrub the brand steel, thereby reducing the roughness of the brand steels; and (6) drying and coiling the brand steel. According to the method for producing cold-rolled stainless steel annealing and pickling brand steel, the production cost is lowered and energy conservation and environmental protection are realized as well as improve the surface quality of the cold-rolled stainless steel annealing and pickling brand steel is improved without adoption of an annealing furnace, a pickling section and a nitrogen-removing device.

Description

technical field [0001] The invention relates to the field of stainless steel plate production, in particular to a new production method of stainless steel annealed and pickled strip steel for cold rolling. Background technique [0002] Cold-rolled stainless steel annealing and pickling strip steel is provided by the stainless steel white coil provided by the hot-rolling stainless steel annealing and pickling line after cold rolling, so the annealing and pickling process of hot-rolled stainless steel strip steel is an important process in the production of cold-rolled stainless steel products. The quality will directly affect the quality of cold plate stainless steel products produced by subsequent processes. [0003] At present, in the production process of cold-rolled stainless steel annealing and pickling strip steel, especially in the process of removing scale on the surface of hot-rolled stainless steel strip steel, the hot-rolled stainless steel strip steel is generally...

AI Technical Summary

Problems solved by technology

[0003] At present, in the production process of cold-rolled stainless steel annealing and pickling strip steel, especially in the process of removing scale on the surface of hot-rolled stainless steel strip steel, the hot-rolled stainless steel strip steel is generally annealed in an annealing furnace first, followed by phosphorus removal. machine + shot blasting machine (dry sandblasting) to remove phosphorus mechanically, and then cleaning + sulfuric acid pickling + cleaning + heavy scrubbing + mixed acid pickling + cleaning + nylon scrubbing + cleaning process, in which the shot blasting machine uses carbon Steel shot pellets, the existing problems of the traditional production method are that the consumption of natural gas in the annealing furnace is relatively large, and the production cost is relatively high; The pollution of the steel strip is also relatively large, and the phenomenon of under-pickling and over-pickling often occurs on the surface of the strip steel. After pickling, there are residual acid spots and dirt on the surface of the strip steel, which affects the quality of the strip steel.

Images