PURPOSE: To provide a laser beam welding method capable of increasing component addition and the depth of penetration by a filler wire.
CONSTITUTION: In the laser beam welding method where parts 3 and 4 to be welded of a couple of metallic members 1 and 2 are abutted on each other, then, while both parts 3 and 4 to be welded are irradiated with a laser beam B, it is moved in the arrow direction (a) along these parts 3 and 4 to be welded and at that time, the filler wire 11 is fed to the parts 3 and 4 to be welded, the filler wire 11 is fed to the parts 3 and 4 to be welded from the rear side of the moving direction (a) of the laser beam B. Since a molten pool (p) is formed on the rear side of the moving direction (a), the filler wire 11 is surely melted by holding heat of the molten pool (p). In addition, since the digging- down force of a cavity (c) by the laser beam B is not affected by the filter wire 11, the depth of penetration is increased.
SAITO YUJI
YAHABA TAKANORI
SATO MASAKAZU
