| 摘要 |
PROBLEM TO BE SOLVED: To enable site welding of titanium or titanium alloy by semi-automatic welding consistently at high efficiency by using a MIG welding method, and to provide a titanium or titanium alloy MIG welding method for reducing a cost through reduction of the shield gas consumption by shortening the welding time. SOLUTION: In the titanium or titanium alloy MIG welding, a titanium alloy wire having a composition consisting of, by mass, 0.5 to 10% Al and≤1.0% O as necessary, and the balance titanium with inevitable impurities and the outer diameter of the wire section of≥1.6 mm and≤2.0 mm is used as a welding wire. In the MIG welding, a titanium base metal or a titanium alloy base metal is welded by the AC pulse welding current satisfying conditions that 200A≤peak current of positive polarity≤500A, -50A≤peak current of negative polarity, and 1.0≤peak current of positive polarity/peak current of negative polarity as the current conditions. The MIG welding of titanium or titanium alloy with excellent bead shape is performed by suppressing a wandering phenomenon. COPYRIGHT: (C)2004,JPO |
