Abstract
With the development of bypass-coupling technique, the process window of twin-wire indirect arc welding has been effectively broadened, but the process stability is required to be further improved. In this paper, the influence of arc voltage on the stability of welding process was investigated through process experiments. It was found that the direct arc and indirect arc were alternately ignited. Under the condition of the output voltage at 32 V, the ratio of the indirect arc current to overall welding current was the largest. The weld was well formed with the output voltage above 32 V. Considering both the deposition efficiency and process stability, the desirable output voltage was 32 V.
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