| 摘要 |
PURPOSE:To reduce the warp which occurs in the course of cooling and after cooling, and to raise the productivity, by water-cooling a web before the final finish rolling, holding a temperature difference of the web and a flange at a specified temperature during the time extending from the time of the final finish rolling to the time of the end of transformation, and water-cooling it in a U- shaped attitude. CONSTITUTION:The final finish rolling is executed, performing the web inside face water-cooling in an inverted U-shaped attitude as to a U-shaped sheet pile on a table roll. Subsequently, the web outside face water-cooling is performed in a U-shaped attitude continuously after the rolling. The cooling treatment in this case is executed in order to control a temperature difference of a web and a flange extending from the time of the final finish rolling and the end of ferrite transformation of the flange after the rolling, to 50 deg.C or below. Subsequently, after the transformation of the flange is ended, it is cut to prescribed length and is cooled on the cooling bed. |
