| 摘要 |
<p>A process for manufacturing cold-rolled steel having deep-drawability, which comprises adjusting the chemical composition (wt %) of the steel to satisfy the conditions of: C <= 0.015 %; Mn <= 0.4 %; P <= 0.03; sol. Al: 0.005 to 0.100 %; N <= 0.010 %; and -0.020 % <= M $(4,)$0.04 %, and conducting hot rolling of steel piece at a soaking temperature of not higher than 1100oC and a finishing temperature of 600 to 780oC. As shown in the attached drawing, the steel enables the rolling at a low temperature, showing excellent deep-drawability and ductility, and good surface properties and surface processability, thus being particularly suited for producing automobile body plates. </p> |
