Effect of pulse M-Arc frequency on Tri-Arc DE droplet transfer and weld forming

In view of the unstable welding process of Tri-Arc DE, surfacing test with Q235 steel plate was completed with the help of the self-built high-speed camera and waveform synchronous acquisition system using the Tri-Arc DE technology. The effects of pulsed M-Arc frequency on Tri-Arc DE droplet transfer and weld formation were analyzed. The results show that while the gradual increase of pulse frequency, the droplet transfer frequency gradually decreases, which is followed by several drops per pulse, one drop per pulse, and one drop within several pulses. The most ideal transfer form is one drop per pulse, of which the welding process is the most stable, and the quality of weld formation is the most satisfied.