| 摘要 |
<p>PURPOSE: A high-strength cold rolled steel sheet with excellent surface properties and bake hardening properties, and a manufacturing method thereof are provided to improve processability by increasing yield strength after baking. CONSTITUTION: A high-strength cold rolled steel sheet with excellent surface properties and bake hardening properties is composed of C .0005~0.004 weight%, Mn 0.2~0.8 weight%, P 0.005~0.2 weight%, S 0.003~0.02 weight%, Al 0.01~0.08 weight%, N 0.004~0.02 weight%, Cu 0.005~0.2 weight%, Fe and inevitable impurities.</p> |
