Surface quality inspection of stainless steel sheet
The surface quality of 304 stainless steel is mainly determined by the pickling process after heat treatment. If the surface oxide skin formed by the previous heat treatment process is thick, or the organization is not uniform, pickling can not improve the surface finish and uniformity. Therefore, full attention should be paid to the heating of heat treatment or surface cleaning before heat treatment. If the stainless steel sheet surface oxide thickness is not uniform, thick and thin place below the base metal surface finish is also different, surface and pickling surface oxide dissolution and the base metal oxide adhesion part of the acid erosion is different, so the surface of the steel plate is not uniform. Therefore, during heat treatment, it is necessary to uniformly form oxide crust. To achieve this requirement, attention must be paid to the following issues: 1, stainless steel sheet if the workpiece surface is attached to oil when heated, the thickness of the...