Submerged arc welding (SAW) is an arc welding process in which two metals are joined by producing heat with an arc between the workpiece and a bare metal electrode.
Before starting, the one that’s welding place a thin layer of flux powder on the workpiece surface. During the process, the arc moves along the joint line and excess flux is recycled via a hopper. The remaining fused slag layer is easily removed after welding.
Submerged arc welding usually is operated as an automatic or a fully mechanized process. Nevertheless, we have seen it done semi-automatic as well. Most often it is used to weld duplex stainless steels,carbon-manganese steels, carbon steels etc. Check out the process in the video below!