| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for linearly heating a steel sheet, which method can stably achieve a large deformation angle. SOLUTION: The method for linearly heating the steel sheet is used for heating the steel sheet so as to simultaneously satisfy both of the following conditions: 700≤Ts≤1,000; and 27×(IYS/1,000)<SP>0.7</SP>×t<SP>-0.32</SP>-30≤Tr≤27×(IYS/1,000)<SP>0.7</SP>×t<SP>-0.32</SP>+30, where Ts(°C) shows a maximum arrival temperature on the right side surface of the steel sheet in the linear heating; Tr(°C) shows a maximum arrival temperature on the back surface of the steel sheet in the linear heating; IYS(K N/mm<SP>2</SP>) shows an integrated value of the yield strength of the steel sheet with respect to temperature from an ordinary temperature to 600°C; and t(mm) shows the thickness of the steel sheet. COPYRIGHT: (C)2007,JPO&INPIT
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