Estudo dos parâmetros de polaridade negativa na soldagem MIG/MAG polaridade variável para revestimento

Abstract

This article aims to investigate the effects of the negative polarity parameters of the current curve on the result of the dilution of the weld beads in the MIG/ MAG variable polarity welding process, targeting to find a set of parameters that offer a lower dilution, which is fundamental for welding for cladding. Through a design of experiments Box-Behnken with three control factors (negative current, negative current time and base current time) varying in three levels each, stainless steel weld beads were deposited on carbon steel. For this process, dilution values of 12% to 15% were achieved, ideal values for cladding welding. The significance of the negative current time in the dilution results was verified, showing the possibility of using negative polarity in the MIG/MAG welding process applied to the cladding.