2015
DOI: 10.1590/0104-9224/si2001.06
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Assessment of the Use of Negative Polarity in Double-Wire MIG/MAG-Welding Filling Passes

Abstract: Abstract:The aim of this work was to evaluate the use of negative polarity in the trail wire in double-wire MIG/MAG-welding filling passes. A comparative study of the conventional technique (two wires working with pulsed DCEP) and the proposed combinations of pulsed DCEP in the lead wire with pulsed DCEN in the trail wire and pulsed DCEP in the lead wire with controlled short-circuit CSC(-) in the trail wire was carried out. The mean current in each wire and the ratio of travel speed to wire feed rate (for the… Show more

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