SURFACE-TREATED STEEL SHEET WITH HIGH STRENGTH SUPERIOR IN CORROSION RESISTANCE AFTER BEING PAINTED, AND CAR COMPONENTS WITH HIGH STRENGTH

摘要

PROBLEM TO BE SOLVED: To provide a surface-treated steel sheet with high strength superior in corrosion resistance after being painted, for manufacturing components requiring the high strength, such as an automotive suspension, and to provide car components manufactured from it.;SOLUTION: The surface-treated steel sheet with high strength superior in corrosion resistance after being painted includes, by mass%, 0.05-0.7% C and 0.5-3% Mn, and has a layer including, by mass%, 20% or more in total of one or more elements among Ni, Cu, Cr and Sn on the surface. Furthermore, the surface layer can include Al, Si, Zn, Mg, Ca, a misch metal, Ti, P, C, B and the like. The steel sheet has the high strength and superior characteristics, and can contribute to weight reduction of automobiles.;COPYRIGHT: (C)2004,JPO