Two-Dimensional Particle Simulation of Flux- Wall Guid ed Transfer in Submerged Arc Welding

Abstract

The flux-wall guided transfer mode in submerged arc welding was mo deled by a particle method and simulated in two dimensions. Moreover, numerical experiments were conducted to investigate the effect of driving forces acting on the molten metal on this transfer mode. As a result, the flux-wall guided transfer was successfully simulated, in which the molten metal droplet left the wire tip while impacting a cavity wall. This computational result showed that a liquid column was formed at the wire tip by the Lorentz force, and then the column was pushed up by the cavity pressure and grown horizontally. Then, molten metal droplets collided with the cavity wall, detached from the wire tip, and were transported toward weld pool and base metal. In addition, from numerical experiments using this computational model, it was suggested that both Lorentz force and cavity pressure were important factors for this metal transfer mode.