HIGH-HEAT RESISTANCE COLD-ROLLED STEEL SHEET WITH EXCELLENT WORKABILITY, CORROSION RESISTANCE AND TARNISH RESISTANCE AND A MANUFACTURING METHOD THEREOF USING Cu-BASED SULFIDE

摘要

PURPOSE: A high-heat resistance cold-rolled steel sheet with excellent workability, corrosion resistance and tarnish resistance and a manufacturing method thereof are provided to improve anti-aging properties and color fastness at high temperatures by reducing solid elements.;CONSTITUTION: A high-heat resistance cold-rolled steel sheet comprises 0.002-0.005wt.% of C, 0.05-0.10wt.% of Ti, 0.02-0.20wt.% of Co, 0.1-0.4wt.% of Cu, 0.05-0.25wt.% of Sn, 0.10-0.35wt.% of Mn, 0.01-0.10wt.% of Al, 0.003-0.020wt.% of P, 0.002-0.006wt.% of N, 0.003-0.015wt.% of S, and the remaining amount of Fe and inevitable impurities, wherein the effective addition ratio of Ti and Co to C, (Ti×Co)/C, is 1.5-3.5 and the atomic ratio of Cu to S, Cu/S, is 5-25.;COPYRIGHT KIPO 2013