| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method controlling a thermal profile in which cooling of rolls is performed by injection of coolant through multiple coolant nozzles arranged at a direction of a roll barrel in a finish rolling, in a hot endless rolling in which a slab is heated in a heating furnace or in a hot batch-type rolling, a sheet bar is also produced by rolling in a rough rolling mill or a continuous finish rolling is performed by the connecting sheet bars. SOLUTION: A flow rate of roll coolant through coolant nozzles located apart at a predetermined distance from both ends of a sheet-bar passage in which a roll and rolled material are in contact with each other is adjusted to be less than the flow rate of roll coolant through coolant nozzles located at other places within the sheet-bar passage. Consequently, difference of thermal expansion of the roll at a barrel direction in the sheet-bar passage is reduced.</p> |
