Submerged arc welding automatic submerged arc welding principle of the task: the welding action is automatically completed by the mechanical device, the arc extinguished under the granular flux layer, the continuation of the welding wire under the flux mask the principle of the task and the parent material, the flux together to form a weld One way.

Advantages: Advantages: High consumption efficiency, oscillating weld quality, energy saving, and good rest conditions Defects: Cannot advance vertical, horizontal or overhead welding; Poor sensitivity, unable to weld irregular welds; Can not weld thin sheets below 1mm in size.