| 摘要 |
PURPOSE: To stably execute continuous hot finish rolling without lowering strength because blow holes are not generated in a butt-joined part between the rear end of a preceding steel and the front end of the succeeding steel. CONSTITUTION: In a method in which hot rolling is continuously executed by successively joining plural long size steels for hot hot rolling, the rear end of the preceding steel and the front end of the succeeding steel are butted and, at the time of joining them by melting them in running with a laser beam while supplying an iron alloy wire filler 50 contg. one or more kinds of Al, Ti and Si to this butted part, after joining them by supplying the wire filler 50 under the conditions within a specified range, hot rolling is executed. |
