Introduction of submerged arc welding
Submerged arc welding(SAW) is a method in which the arc is burned under the flux layer to weld.In the welding process,the arc is covered by flux,and the wire feeding and arc movement are automatically controlled by a mechanical device.The process is normally limited to a horizontal-fillet welding position,but with a high deposition rate.This welding process is usually applied to carbon steels,low alloy steels,stainless steels,and nickel-based alloys.
Advantages of submerged arc welding:
(1) high production efficiency,fast welding speed;
(2) good weld quality,stable welding process,beautiful weld;
(3) save welding materials and electric energy;
(4) mechanized operation, low labor intensity,and less harmful substances, less physical damage to welders.
Disadvantages of submerged arc welding:
(1) welding process is not easy to observe,not conducive to timely adjustment;
(2) mainly used in the position of plain welding;
(3) poor maneuverability and complicated welding equipment,which are not suitable for short welding seams and difficult for irregular welding seams;
(4) not suitable for welding thin plates with thickness less than 1mm.