Research on Pulsed Triple-Wire Gas Indirect Arc Welding Process Based on Arc Deflection Behavior

A detailed study of the pulsed triple-wire gas indirect arc (TW-GIA) welding process based on the arc deflection effect was carried out in this article. The arc anode deflection mechanism, the effect of pulse parameters on weld forming and efficient welding process were systematically studied. The results showed that the special annular electric field and the non-uniform magnetic field were the main reasons for the indirect arc deflection to the anode. When the main wire acted as the anode and the side wires acted as the cathode, the two indirect arcs would deflect synchronously toward the main wire and couple into one arc with high energy density and larger arc stiffness. The arc length and welding depth can be controlled by adjusting the pulse parameters. A stable and efficient single-pass pulsed TW-GIA welding process for a 10 mm Q235 steel plate was developed. The fusion of the side wall of the welded joint was very good, the average tensile strength reached 471.2 Mpa and all joints broke in the base metal.