| 摘要 |
PURPOSE: To provide such a method for joining a hot rolled billet capable of speeding up tack welding in laser welding or reducing the laser output. CONSTITUTION: In a method in which a billet is joined by abutting the rear end of a preceding billet 1 on the tip end of a succeeding billet 3 and tack- welding 7 the abutting part 5 by laser welding and then joining the part by pressure welding, the optical axis 21 of the laser beam is inclined backward against the welding direction, approximately in the plane 18 including the abutting face of the billets 1, 3, so that the laser beam scans along the abutting line 6. |
