Abstract:
This paper presents a study carried out about the use of the outof- phase current-pulse technology applied to the double-wire MIG/MAG welding process with insulated potentials on coatings. High-speed digital images were recorded with the objective of evaluating the metallic transfers and the behaviour of the voltaic arcs under the influence of the out-of-phase current pulses. Bead-on-plate welds were deposited in the plane and overhead positions in order to study the resulting geometric characteristics. The results showed that, with the electrodes positioned side by side and the mean currents below the transition current, the out-of-phase current pulses reduce the deviations of the arcs and have an influence on the penetration profile of the weld beads, but they are not necessarily beneficial for the bead formation.
Referência:
DUTRA, J. C. ; MOTTA, Marcelo Ferreira ; SCOTTI, Américo . A Study on Out-of-Phase Current Pulses of the Double Wire MIG/MAG Process with Insulated Potentials on Coating Applications. Welding and Cutting, Alemanha, v. 01, n. 01, p. 10-14, 2005.