Resumen

SOUZA, Daniel et al. Influence of the welding parameter setting on the MIG/MAG process stability working with short-circuiting. Soldag. insp. (Impr.) [online]. 2011, vol.16, n.1, pp. 22-32. ISSN 0104-9224.  http://dx.doi.org/10.1590/S0104-92242011000100004.

Due to the wide applicability of short-circuiting GMA welding, a fully understanding of the parameter settings on the metal transfer stability turn into an important issue. Bead-on-plate welds were carried out for assessing the influence of voltage, CTWD and up and down current rates over the metal transfer regularity, using 3 commercial shielding gas blends. As comparative criterion, the transfer regularity was quantified through an index taken from voltage and current traces. The results shown that, working with short-circuits, the setting voltage has strong influence on the metal transfer stability; there is an optimum range. This range is remarkably influenced by the shielding gas type, current value, CTWD and inductance factor settings. The lower the CO₂ content in the blend, the more regular the transfer. The inductance factor effect is dependant of the CO₂ content in the blend.

Palabras llave : MIG/MAG; short-circuiting; metal transfer stability; operational range.