| 摘要 |
PURPOSE:To obtain an Al killed steel with superior workability at a low cost by adding prescribed percentages of C, Mn, Al, N, Nb and Ti and carrying out rolling at a prescribed temp. CONSTITUTION:An Al killed steel slab or strip consisting of, by weight, <=0.1% C, <=0.5% Mn, <=0.015% N, 0.015-0.1% acid-sol. Al and the balance Fe or further contg. <=0.1% in total of 0.002-0.1% each of Nb and/or Ti is formed by continuous casting. The slab or strip is cooled once to the Ar3 transformation point-the Ar3 transformation point -100 deg.C immediately after solidification. It is immediately reheated to <=1,100 deg.C and rolled at 900-1,100 deg.C starting temp. The hot rolling is finished at the Ar3 transformation point or above. |
