Submerged arc is one way that arc carry out welding by combustion under flux layer.
The principle of submerged arc is this, the arc work area was covered with solder layer.Make use of the heat of combustion between the wire and the weldment to melt the wire, and the base material (weldments) to form a weld.
There are some key features of submerged arc, welding productivity is high; weld quality is relatively good; low cost welding; Good working conditions; it has high quality requirements for weldment assembly; Not suitable for welding sheet metal (welding current is less than 100 A, arc stability is not good) and short weld.
Submerged arc is widely used in shipbuilding, boiler, bridge, lifting machinery and metallurgical machinery manufacturing industry. All weldments of welds held in a horizontal position or tilt angle small may be applicable to submerged arc, such as stainless steel, heat-resistant steel, composite steel.
