Patent ID: 6017643
Filing Date: 2000-01-25
Classification: C23C,Y10T

Abstract:
A hot-dip aluminized steel sheet comprising:a base-metal steel sheet having a surface;an Al--Si coating-metal layer, provided on said surface of said base-metal steel sheet, having a Si content of 3-13% by weight;an Fe--Al--Si alloy layer, formed between said base-metal steel sheet and said Al--Si coating-metal layer;an interface between said Fe--Al--Si alloy layer and said Al--Si coating-metal layer; andwherein said Fe--Al--Si alloy layer has an average thickness of 1-5 .mu.m and an average value of maximum differential unevenness of thickness, defined as a distance, measured perpendicularly from said surface of said base-metal steel sheet, between a point on said interface nearest said base-metal steel sheet and a point oil said interface farthest from said base-metal steel sheet, of 0.5-5 .mu.m.