| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for joining sheet bar capable of preventing breakage of a sheet in fully continuous hot rolling by improving joining performance around an edge in the width direction of a sheet bar joining portion without increasing the size of a joining device. <P>SOLUTION: In a fully continuous hot rolling method, immediately before finishing rolling in a hot rolling line, a tail portion of a preceding sheet bar and a tip portion of a following sheet bar are sheared by using a shear, and then, heating and upset joining are performed to perform continuous finishing rolling, so as to continuously produce a plurality of hot-rolled steel coils from a plurality of slabs. In the method for joining sheet bar, the heating and joining are performed after both edges in the width direction of a joining end face of at least one of the preceding sheet bar and the following sheet bar are chamfered to form a tapered shape. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
