| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser welding technique which has a high capacity of fusing a base material without using a laser beam machine of high output and which has high efficiency and high quality. <P>SOLUTION: The laser welding technique combines a laser beam 1 and a hot wire 2, inserts the laser beam 1 into a leading part and the hot wire 2 into a following with respect to the welding advancing direction. The technique irradiates a surface of the base material 3 to be welded with the laser beam 1, wherein the laser beam 1 is defocused, and a direction of a reflecting beam 1' of the laser beam 1 on a surface of a molten pool 5 formed by the irradiation and fusion of the hot wire is defined as a front of the molten pool 5 and the welding is carried out while always forming a leading molten pool 5a. <P>COPYRIGHT: (C)2012,JPO&INPIT |
