Dependency of arc efficiency on welding current in gas metal arc welding

Shoji Fujiyama; Hisaya Komen; Manabu Tanaka

doi:10.2207/qjjws.40.9WL

Shoji Fujiyama, Hisaya Komen, Manabu Tanaka

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Keywords: GMAW, thermal efficiency, heat input, liquid nitrogen, calorimetry, radiation, metal transfer

JOURNAL FREE ACCESS

2022 Volume 40 Issue 4 Pages 9WL-12WL

DOI https://doi.org/10.2207/qjjws.40.9WL

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Abstract

Arc efficiency of gas metal arc welding was measured in changing welding current. Increasing welding current, arc efficiency showed convex curve. Estimating amount of heat transferred by metal droplets, it was concluded that increase of arc efficiency in the welding current less than 186 A was caused by heat of metal transfer, while decrease in the welding current more than 186 A was caused by overwhelming arc radiation.

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