| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crown control method in hot-finish rolling capable of crown control even in a steel sheet of narrow width and one of asymmetrical thickness in the width direction. <P>SOLUTION: The crown control method in hot-finish rolling is characterized in that a bar heater 3 comprising a plurality of transverse induction heating devices capable of moving in the width direction of the steel sheet S is placed on the upstream side of a finish rolling machine 10 in a hot-rolling line, and in that a profile meter 1 which obtains the thickness of the steel sheet S by simultaneously measuring the steel sheet all over the width is arranged on the outgoing side of the finish rolling machine 10, thereby controlling the position and heating amount in the width direction of the bar heater 3 so that the amount of crown of the steel sheet on the outgoing side of the finish rolling machine 10 may be within a target value set previously on the basis of the sheet thickness profile in the width direction of the steel sheet S measured by the profile meter 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
