| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.18 ( May 1988 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Hot Rolled Steel Sheet with Excellent Deep Drawability, "KFN3" Kei Sakata, Koichi Hashiguchi, Shinobu Okano, Tateo Higashino, Masataka Inoue, Susumu Sato |
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Synopsis : Hot rolled steel sheet with extra-low carbon content which exhibits excellent formability has been newly developed in Kawasaki Steel. Chemical composition of this steel is specially controlled, that is to say, sulfur content is 0.003 wt% or less and titanium is added so that the effective Ti/C atomic ratio will come to more than 1.0. In the hot rolling process, this steel is coiled at a temperature lower than 600. The characteristics of this steel are as follows; (1) Total elongation is 55% or higher (3.2mm thick). (2) Planar anisotropy is minimal in spite of Ti-addition. (3) This steel exhibits a higher resistance to cold-work brittleness due to the control of both residual solute carbon content and fine grain sizes. |
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