High-Current AC-MIG Welding Process

Development of AC-MIG Welding Process (Report 1)

Abstract

To prevent weld defects likely to occur in DC-MIG welding and to avoid arc-instability due to elec tromagnetic blow in DC-MIG welding, an AC-MIG welding has been developed which uses high voltage pulse from a pulse generator sympathized with industrial frequency.
This process enables to avoid the weld-defects caused by lower arc pressure exerting on the molten pool. Furthermore, this process can provide weld metal of a low oxygen content with high toughness.