| 摘要 |
<p>PURPOSE: A high heat-resistance cold-rolled steel sheet and a manufacturing method thereof are provided to ensure excellent formability by preventing of yield-point stretching, to extend facility's lifespan by form conservation of a product and to ensure excellent discoloration resistance at a high temperature. CONSTITUTION: A high heat-resistance cold-rolled steel sheet having excellent formability, and discoloration resistance consists of 0.002~0.005% of C, 0.05~0.25% of Sn, 0.001~0.003% of B, 0.03~0.08% of Zr, 0.002~0.006% of N, 0.4~0.8% of Mn, 0.02~0.08% of Al, 0.03~0.08% of P, 0.015% or less of S, Fe and inevitable impurities, by weight%. The atomic ratio of the Zr and C is 0.03~1.2.</p> |
