Analysis on metal transfer of MAG welding with strip electrode

The metal transfer of MAG welding with strip electrode was investigated with high speed camera system.The strip electrode does not melt uniformly and there are several droplets generated when welding with low current.With the increase of welding power,the strip electrode melts uniformly and there is only one droplet generated.The pendant droplet moves along the strip electrode end and detaches at uncertain location.The metal transfer mode consists of short-circuiting transfer,globular transfer,projected transfer,streaming transfer and rotating transfer.The experimental results show that the projected transfer is the main transfer mode,and there is good corresponding relationship between the metal transfer mode and the arc voltage and welding current wave form.Because of the special electrode shape and the metal transfer character,MAG welding with strip electrode is suitable for welding with high current and high traveling speed,and so it can enhance the welding efficiency.