| 摘要 |
PROBLEM TO BE SOLVED: To suppress the deformation of a sheet by minimizing a camber by cooling which is generated during the cooling and to surely execute draining by minimizing the clearance generated between a restraining drain roll and a steel sheet. SOLUTION: This method is a cooling method of a high-temp. steel sheet by which cooling is on-line executed while passing through between plural pairs of restraining rolls and the cooling is executed by adding constraint force larger than the constraint force P per one restraining roll shown by formula, P=CDcv t<2> L<0.65> (W/4000)<2> . In the above formula, C is a constant (=5×10<-5> ), Dcv is a temp. gradient ( deg.C/m), (t) is sheet thickness (mm), L is distance between the restraining rolls (m) and W is width (mm).
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