| 摘要 |
PURPOSE:To obtain a hot rolled steel sheet having superior workability such as drawability by hot rolling a steel consisting of specified amts. of C, Mn, S, Al, B, Ti, N and Fe at a prescribed finishing temp. CONSTITUTION:A steel consisting of, by weight, <=0.03% C, <=0.3% Mn, <=0.01% S, 0.01-0.08% Al, 0.0002-0.0015% B, 0.005-0.15% Ti, <=0.003% N and the balance Fe is manufactured by refining and hot rolled at a finishing temp. of the Ar3 point or above. The resulting hot rolled steel sheet is coiled.
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