| 摘要 |
PURPOSE:To obtain a sound welded joint with high efficiency by supplying metal powder consisting of low C, low Si, low Mn and the balance Fe substantially as filler metal. CONSTITUTION:The laser beam is oscillated from a laser beam oscillator 1 and a bead 4 is formed on base metals 3 to perform welding by using a torch 2. At that time, the metal powder consisting of low C, low Si, low Mn and the balance Fe substantially is supplied from a powder feeder 5. The powder contains <=0.30wt.% C and 0.5-9.5% deoxidizer mainly composed of Si and Mn. As necessary, the powder further contains >=1 kind of, by wt.%, 0.01-0.15% Ti, 0.01-0.15% Nb, 0.025-0.15% P and 0.01-0.15% Zr. Consequently, a filler metal component can be easily changed. |
