Improvement of Welding Stability and Toughness Using Gas Metal Arc Welding in Pure Ar Shielding Gas
Terumi Nakamura* and Kazuo Hiraoka**
*National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
**Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
We develop a coaxial multilayer solid wire to use in Gas Metal Arc welding with pure Ar shielding gas (Ar-GMA welding). The oxygen concentration in weld metal that degrades the welded parts is reduced using by Ar-GMA welding. We produce stable welds with pure Ar shielding gas and obtain a high-quality joint with improved toughness.
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