| 摘要 |
<p>PURPOSE: A high heat-resistance cold-rolled steel sheet having excellent processability, heat resistance, and discoloration resistance and a manufacturing method thereof are provided to optimize the condition of processes by reducing the addition of alloying elements. CONSTITUTION: A high heat-resistance cold-rolled steel sheet having excellent processability, heat resistance, and discoloration resistance comprises C 0.002~0.010 weight%, Mn 0.3~0.6 weight%, P 0.03~0.08 weight%, Al 0.02~0.08 weight%, B 0.001~0.003 weight%, W 0.05~0.30 weight%, Sn 0.05~0.25 weight%, N 0.002~0.010 weight%, Nb 0.02~0.08 weight%, S less than 0.015 weight%, Fe, and inevitable impurities. The value of atomic ratio Nb/C is 0.8~2.0.</p> |
