MICRO OVERLAY WELDING METHOD

PURPOSE:To perform micro overlay welding on an electrode even in both advancing and retreating directions and to prevent a different kind of metal from being mixed in micro overlay metal in a micro mover-lay welding method applied to the correction of a metal mold and the blade correction of a gas turbine, a jet engine, etc. CONSTITUTION:The electrode 5 is formed by providing a through hole 5-1 piercing through a shaft center part, and alloy powder 9 for overlay is supplied from the hole 5-1 to the surface of a base mayterial 4. A fixed quantity supplying mechanism such as a screw 5-2, is loaded on the base terminal part of the electrode 5, and the alloy powder 9 for overlay is supplied to the center of the tip of the electrode by the rotation of the screw. As for the quality of the electrode, the one with the same component as that of the alloy powder 9 desired to overlay on a material to be worked is used. The conductor 8-1 on one side of the conductors from a power source 7 is connected to the electrode 5, and the conductor 8-2 on the other side to a base material 4.