| 摘要 |
PURPOSE:To manufacture a cold rolled steel sheet with superior drawability by hot rolling a slab of a dead soft steel having a high Al content under specified conditions, and subjecting the hot rolled plate to conventional cold rolling and continuous annealing. CONSTITUTION:A slab of a dead soft steel contg. <0.0030% C, <0.0050% N, <0.5% Mn and 0.10-0.20% sol. Al is heated to >=1,150 deg.C and hot rolled at 700-850 deg.C finishing temp. and >=600 deg.C coiling temp. The hot rolled plate is cold rolled as usual, and the resulting steel sheet is continuously annealed to manufacture a cold rolled steel sheet with superior drawability. |
