Method for reducing roughness of hot-rolled pickled surface of 10Cr17 stainless steel

Abstract

The invention discloses a method for reducing the roughness of a hot-rolled pickled surface of 10Cr17 stainless steel. The method comprises the following steps that 1, annealing of a steel coil is performed, wherein cover annealing treatment is performed on a hot-rolled 10Cr17 stainless steel black skin coil, the annealing temperature is 760-850 DEG C, and the heat preservation time is 18-22 hours; 2, the shot blasting process is performed, wherein through a shot blasting machine striking angle test, the striking angle of a shot blasting head is adjusted to enable a shot blasting striking surface to be uniformly distributed on the steel strip, and the rotating speed on a transmission side is adjusted to be 25-30Hz, the rotating speed on an operation side is adjusted to be 33-38Hz; and 3, sulfuric acid and mixed acid pickling is performed, wherein sulfuric acid and mixed acid pickling is performed on the shot-blasted steel strip, the concentration of sulfuric acid is 200 g / L-280 g / L, and the concentration of hydrofluoric acid in mixed acid liquor is 0.5 g / L-1.5 g / L. The method can effectively control the surface roughness Ra of the steel strip to be less than or equal to 3.5 micronsso as to solve the contradiction problem between the pickling quality and the surface roughness of the steel strip.

Description

technical field [0001] The invention relates to the field of stainless steel hot-rolled pickling, in particular to a method for reducing the surface roughness of 10Cr17 stainless steel hot-rolled pickling. Background technique [0002] With the development of the domestic stainless steel market, 10Cr17 stainless steel has good wear resistance, corrosion resistance and processability, and has an advantage in price, and is widely used in architectural decoration, home appliances, electronic products and other industries. 10Cr17 stainless steel for this kind of use has very high requirements on the surface. When pickling after annealing, it is necessary to ensure that the surface of the steel strip has no quality defects, and the surface roughness should not be too high. [0003] Although the traditional hot-rolled pickling process can guarantee the surface quality of the steel strip, due to the shot blasting force and the high concentration control of the "sulfuric acid + mixe...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to effectively control the surface roughness of the steel strip Ra≤3.5 μm under the premise of ensuring the surface quality of the hot-rolled pickling of 10Cr17 stainless steel, and to provide a method for reducing the surface roughness of the hot-rolled pickling of 10Cr17 stainless steel , to solve the contradiction between the pickling quality and the surface roughness of the steel strip

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