| 摘要 |
PURPOSE:To roll a material hard to weld while performing the connection between coils in a continuous line by connecting a preceding coil and succeeding coil via a leader strip connected to a hot rolling coil and rolling the leader strip and hot rolling plate with the same schedule. CONSTITUTION:In an auxiliary line out of the continuous line, a leader strip whose welding is comparatively easy is connected to both ends of a hot rolling coil A first by a laser welding machine, etc., in advance. The hot rolling coil A connected with the leader strip is fitted into a pickling and continuous cold rolling lines, and the leader strip of the preceding coil rear end and that of the succeeding coil tip are connected by a flash butt welder 5. In the continuous rolling line, the change of the rolling schedule corresponding to the deformation resistance of the hot rolling coil and leader strip is not performed and the leader strip is rolled with the same schedule as that of the hot rolling coil. Consequently, the continuous rolling of the material hard to weld of an electrical steel sheet, etc., can be performed without lowering the productivity. |
