| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cooling method of a joined steel sheet for stably manufacturing the steel sheet having the target quality by cooling the steel sheets after finish rolling to the target temperature of the steel sheet and coiling it. SOLUTION: A heat transfer coefficient used for determining the volume of injected water necessary to cool a finished rolled-stock 11 from the injecting equipment 13, 14 is stored respectively in a rolling speed section divided by every rolling speed of the finished rolled-stock 11, thickness section divided by every thickness of the finished rolled-stock 11, target temperature section divided by every target temperature of the finished rolled-stock 11 and steel grade section divided by every steel grade of the finished rolled-stock 11, the heat transfer coefficient is searched in accordance with finish-rolling conditions of the finished rolled-stock 11 from these respective stored sections and the volume of the injected water necessary to cool the finished rolled-stock 11 is calculated using this searched heat transfer coefficient, so that the volume of the cooling water from the water injecting equipment 13, 14 is controlled to the calculated volume of the injected water.</p> |
