Method of cooling hot steel plates
    2.
    发明授权
    Method of cooling hot steel plates 失效
    冷热钢板冷却方法

    公开(公告)号:US4596615A

    公开(公告)日:1986-06-24

    申请号:US703384

    申请日:1985-02-20

    摘要: Hot steel plate as hot-rolled is passed forward longitudinally through pairs of top and bottom rollers disposed in the direction of the plate travel. The steel plate is cooled with water supplied to its top and bottom surfaces from the nozzles on a plurality of cooling units disposed in the same longitudinal direction. Each cooling unit is disposed between adjoining pairs of the top and bottom rollers. Before cooling is started, the temperature distribution in the steel plate is determined and the desired mean cooling rate is set. The distance from the plate edge over which the supply of the cooling water at least to the bottom side of the plate is to be cut off is determined for each cooling unit on the basis of the determined temperature distribution and preset mean cooling rate. By so doing, the temperature of the inner edge portion of the steel plate is kept above the temperature of the middle portion, thereby allowing the Ar.sub.3 transformation in the inner edge portion to occur simultaneously with or after the Ar.sub.3 transformation in the middle portion. The cooling water directly supplied to the edge portion of the steel plate is cut off over the distance thus determined.

    摘要翻译: 热轧的热钢板沿着板行进方向设置的成对的上下辊纵向前进。 钢板由设置在同一长度方向上的多个冷却单元上的喷嘴的顶面和底面供给水冷却。 每个冷却单元设置在邻接的顶部和底部辊对之间。 在开始冷却之前,确定钢板中的温度分布并设定所需的平均冷却速度。 基于所确定的温度分布和预设的平均冷却速率,确定对于每个冷却单元至少要对板的底侧供应冷却水的板边缘的距离。 通过这样做,钢板的内边缘部分的温度保持在中间部分的温度之上,从而允许内边缘部分中的Ar 3变形与中间部分中的Ar 3变换同时发生。 直接供给到钢板的边缘部分的冷却水在如此确定的距离处被切断。