Abstract
For the purpose of studying the welding operativeness of new waveform controlled CO2 gas shielded arc welder, some welding tests concerning with arc voltage, welding speed and wire brand were carried out. And relationships between bead shape and spattering were investigated.
The new waveform controlled welder gives the decrease of sticking spatter on the nozzle and base metal compared with the conventional welders. However the spatter increases when the arc voltage is apart from the most suitable value at which spattering is the least, and when the welding speed is high. The selection of wire brand also affects the amount of spatter.
The spatter increases remarkably when the current level at the later stage of arc duration is high. On the other hand, the current level at the later stage of arc duration decides the penetration depth. The penetration depth is deep when the current level is high. Therefore, there is a negative correlationship between bead shape and spatter.
