Patent ID: 9034480
Filing Date: 2015-05-19
Classification: B32B,C23C,Y10T

Abstract:
1. A hot-dip Al—Zn coated steel sheet that includes an Al—Zn coating layer having an Al content in the range of 20% to 95% by mass on a surface of the steel sheet, wherein the Al—Zn coating layer contains 0.01% to 10% by mass of Ca, the coating layer having equal parts in a thickness direction with one part nearer an outer surface of the coating layer and one part nearer the steel sheet, wherein the Ca is present in a greater amount in the part of the coating layer nearer the outer surface of the coating layer, and wherein a steel sheet surface layer within 100 μm from a surface of the base steel sheet directly under the Al—Zn coating layer contains 0.06 to 1.0 g/m 2 per surface of an oxide of at least one selected from Fe, Si, Mn, Al, P, B, Nb, Ti, Cr, Mo, Cu, and Ni in total.