| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling system for hot-rolled steel strips with which strong cooling is performed by stably controlling the winding temperature of the steel strip in the cooling process of the steel strip in a run out table from the final finishing mill to a winding machine and its cooling method. SOLUTION: Two cooling systems whose cooling capacities are different are provided in the run out table 3 behind the final finishing mill 2E, a system on the upstream side is a first cooling system 5 for performing strong cooling and the other system on the downstream side is a second cooling system 6 for performing soft cooling. Cooling is continuously performed by these cooling systems, the length of a cooling zone is adjusted in accordance with acceleration and deceleration of the rolling speed of the steel strip, the value of the temperature drop of the steel strip is controlled roughly by using a rapid cooling system on the proceeding stage and minutely by using a slow cooling system on the succeeding stage and the steel strip is cooled so that stop temperature is in a prescribed winding temperature. COPYRIGHT: (C)2009,JPO&INPIT
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