| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rolling method for a steel to produce a hot rolled material excellent in material quality by coinciding a temperature distribution in the longitudinal direction of a finish rolling mill with a target value in temperature control of a hot rolling material in a hot rolling mill. SOLUTION: A rolling method of a steel includes a process to rough roll a slab to a rough bar 6, a process to subject the rough bar 6 to induction heating, a process to control a temperature of a steel after finish rolling to a target value by detecting a surface temperature of the rough bar 6 after induction heating and adjusting an induction heating temperature based on the detected temperature value and a process to subject the rough bar 6 induction heated to finish rolling. A heating temperature control process includes a process to calculate a target temperature distribution in the longitudinal direction of the rough bar 6 after induction heating, a process to measure a temperature in the longitudinal direction of the rough bar 6 after induction heating, a process to calculate the deviation between the measure temperature value and the target temperature value and a process to control an induction heating quantity based on the deviation.</p> |
