| 摘要 |
PROBLEM TO BE SOLVED: To manufacture high carbon steel strip excellent in processability and heat treatment property at good efficiency.SOLUTION: A steel containing, by mass%, C:0.15 to 1.0% is hot rolled in an austenite range to prepare a steel strip S, winding the steel strip S at a temperature of 550°C or less to prepare a coil 2, then the coil 2 is unwound with heat treating the unwound steel strip S to 700°C or less at average heating rate of 50°C/s or more by using a heating device 1 again and the steel strip S is wound to prepare a coil 2'.SELECTED DRAWING: Figure 1 |
