Surface grinding method of high-grade stainless steel plates for automobiles

Abstract

The invention discloses a surface grinding method of stainless steel plates. The method comprises steps as follows: (1), to-be-treated steel coils are fed into a scale breaker and subjected to scale breaking treatment, and steel plates with plate flatness smaller than or equal to 15 mm are obtained; (2), the steel plates are subjected to hot-rolled pickling, and then the hot-rolled plates are classified into light, moderate and severe according to the severity of surface defects; (3), the hot-rolled plates are fed into a grinder, abrasive belts of grinding heads of the grinder are configured according to the classification of surfaces of the hot-rolled plates, the surfaces of the hot-rolled plates are subjected to coarse grinding by adopting the abrasive belts with decay time of 20-60 min,and the surfaces of the hot-rolled plates are subjected to accurate grinding by adopting the abrasive belts with decay time of 300-1000 min; and (4), the steel plates output by the grinder are rolled, and the total deformation is larger than or equal to 60%. According to the method, defects of chromatic aberration and rough stripes on the surfaces of the hot-rolled plates can be overcome, the defect of small pits produced by grinding is overcome, the qualification rate of the steel plates for the automobile is increased, the use efficiency of the abrasive belts is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of steel plate surface treatment. Specifically, the invention relates to a method for surface grinding of high-grade stainless steel plates for vehicles. More specifically, the present invention relates to a surface grinding method for high-grade stainless steel plates of 441 series vehicles. method. Background technique [0002] 441 series high-grade stainless steel automotive sheets are mainly used in the high-end commercial vehicle industry. As users have higher and higher requirements for the surface quality of automotive sheets, many high-end customers require zero defects in the surface quality of high-grade automotive sheets. Customers not only require that there be no deep defects such as inclusions, scratches, and pits on the surface of the steel plate, but also require no defects such as surface color difference and rough stripes. The color difference and rough defects on the surface of cold-rolle...

AI Technical Summary

Problems solved by technology

But, there is following defect in this application: first, what the grinding method disclosed in this application obtains is No.3 or No.4 frosted steel plate surface, and the 2D matte surface of the high-grade stainless steel for automobile, 2B smooth, flat surface The user’s final surface requirements are inconsistent, so the grinding method disclosed in this application cannot produce the steel plate surface quality recognized by the user; secondly, the original 441 series stainless steel plate surface has defects such as roughness, streaks, and color difference, and the user has zero tolerance for these defects. After the grinding method disclosed in the application uses shot blasting to treat the surface of the raw material, it is still not possible to obtain a uniform surface of the steel plate in the vertical and horizontal directions. The user's requirements cannot be met through finished product grinding, and the surface grade of the finished product after grinding is not consistent with the user's requirements.

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