Study on new GMA welding process with duplex current feeding |
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| Authors: | SETO Masaru AOKI Atsuhito TANAKA Manabu TASHIRO Shinichi ERA Tetsuo |
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| Affiliation: | 1. Kawasaki Heavy Industries Ltd.,;2. Joining and Welding Research Institute, Osaka University;3. Daihen Corporation |
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| Abstract: | Gas metal arc welding (GMAW) under pure argon shielding gas atmosphere (pure argon-GMAW) is suitable to obtain a high-strength and high toughness welded joint. However, it is difficult that pure argon-GMA welding is applied practically welding structure because of arc instability. In order to perform stable pure argon-GMA welding, duplex current feeding GMAW (DCF-GMAW) has been developed. The DCF-GMAW consists of primary GMA welding current and secondary welding current by constant-current power resource. DFC-GMAW can feed larger current near wire tip. This effect makes that weld penetration depth is deeper, weld bead shape is improved using DCF-GMAW. |
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| Keywords: | GMA welding pure argon shielding gas duplex current feeding droplet temperature two-colour pyrometry |
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