Patent ID: 6797411
Filing Date: 2004-09-28
Classification: B24C,C23C,Y10T

Abstract:
A method for manufacturing galvanized steel sheet, comprising the step of adjusting a surface texture of a galvanized steel sheet by blasting solid particles against a surface of the galvanized steel sheet;the surface texture being at least one selected from the group consisting of a mean roughness Ra on the surface of the steel sheet, a peak count PPI on the surface of the steel sheet, and a filtered centerline waviness Wca on the surface of the steel sheet; the step of adjusting the surface texture comprising at least one step selected from the group consisting of: (a) adjusting the mean roughness Ra on the surface of the steel sheet to a range of from 0.3 to 3 &mgr;m; (b) adjusting the peak count PPI on the surface of the steel sheet to 250 or more; and (c) adjusting the filtered centerline waviness Wca on the surface of the steel sheet to 0.8 &mgr;m or less, and wherein the step of adjusting the surface texture includes adjusting the surface texture of the galvanized steel sheet by blasting solid particles against the surface of the galvanized steel sheet at a blasting density of from 0.2 to 40 kg/m2, the solid particles having average particle sizes of from 10 to 300 &mgr;m.