| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a low-power-output hot wire laser welding method and apparatus, which can join even an extremely thick steel plate of about 20 mm, and which can reduce warming to a large extent compared with electroslag welding, for securing fracture toughness of a welded joint. <P>SOLUTION: In the hot wire laser welding method, a laser spot 21 obtained by removing the focus of laser light 2 is radiated to a base material being in a gap formed between groove wall surfaces 10, 11 of a pair of the base materials to melt the base material 8, by applying electricity to between the welding wire 3 and the base material 8, and supplying the wire 3 as a hot wire to the molten portion of the base material 8, a molten metal pool 7 comprising the molten base material 8 and the wire 3 is formed, the laser spot 21 is moved so as to pass through the borderline of the groove wall surface 10 of either one of the pair of the base materials 8 and the molten metal pool 7, then the laser spot 21 is moved so as to pass through the borderline of the groove wall surface 11 of the other side of the base material 8 and the molten metal pool 7, the actions are repeatedly performed to weld the mutual base materials 8. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
