| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling method of a steel product capable of accurately removing temperature distribution variation in the length direction of a crude bar and skid marks and enhancing quality at the minimum of power consumption by calculating a maximum value of temperature signals detected with a temperature detector on the inlet side of an induction heating device, and heating the difference between a temperature curve connecting the maximum values and a temperature detecting value with the induction hating device. SOLUTION: This rolling method contains a process for forming a crude bar 3 by rough rolling of a slab; a process for induction heating the crude bar 3; a process for detecting temperature of the crude bar 3 before induction heating and controlling induction heating temperature of the crude bar 3 based on the detected temperature value; and a process for finishing rolling the induction heated crude bar 3, and the heating temperature control process has a process for calculating the maximum value of the temperature detecting values in the length direction of the crude bar 3, and a process for controlling the induction heating temperature of the crude bar 3 based on the difference between a curve connecting the maximum values and the temperature detecting value.
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