| 摘要 |
PROBLEM TO BE SOLVED: To make penetration shallow even in the case of a high welding current and to increase the speed of build-up welding by vertically and downward advancing, while rotating a welding wire in a high speed in a shield gas atmosphere and conducting build-up welding on a metal panel surface vertically held. SOLUTION: The material of a welding wire is preferably a nickel base alloy, a shield gas is preferably argon or an argon based mixture gas. A rotation diameter of a wire tip is set to 2-5 mm, a rotation speed to 10-60 Hz. A welding power source is that an average electric current is a pulse current of 200-240 A or a DC of 220-280 A. A welding voltage is preferably 27-32 V. A welding speed is preferably 1-1.3 m/min. A dilution rate of a nickel base alloy by welding is preferably <=20%. A welding speed as well as a welding current are made larger, welding efficiency is improved, the penetration is made shallow, the dilution rate is lowered, the corrosion resistance of a welded face is improved.
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