Process Variations:

Submerged arc welding lends itself to a broad variety of flux and wire combinations, multiple and single electrode arrangements, and utilize of ac or dc welding power sources. The procedure has been adapted to a broad range of materials and thicknesses. Many multiple arc configurations might be used to control the weld profile and increase the deposition rates over single arc operation. Weld deposits might range from broad beads with shallow penetration for surfacing, to narrow beads along deep penetration for thick joints. Part of this versatility is derived from the utilization of ac arcs.

The principles that favour the use of ac to minimise arc blow in single arc welding are frequently applied in multiple arc welding to produce a favourable arc deflection. The current passing in adjacent electrodes sets up interacting magnetic fields that might either reinforce or diminish each other. In the space among the arcs, these magnetic fields are utilized to produce forces that shall deflect the arcs (and therefore distribute the heat) in directions beneficial to the intended welding application.

Many types of power sources and connected equipment are designed and manufactured especially for multiple arc welding. These comparatively sophisticated machines are intended for high production on long runs of repetitive type applications.

Equipment

The equipment needed for submerged arc welding consists of following :

A.      A power supply

B.      An electrode delivery system

C.      A flux distribution system

D.     A travel arrangement

E.      A process control system

Optional equipment involve flux recovery systems and positioning or manipulating equipment.