Submerged arc welding

I. principles and characteristics of submerged arc welding

Submerged arc welding is also a welding method which USES arc as heat source. In submerged arc welding, the arc is burned under a pellet of fusible flux and the arc light is not exposed. Submerged arc welding hence the name. The metal electrode used is a continuous feed of bare wire.

Application scope of submerged arc welding

Because of the deep penetration, high productivity and high degree of mechanical operation, submerged arc welding is suitable for welding long weld of plate structure. It is widely used in shipbuilding, boiler and pressure vessel, bridge, overweight machinery, nuclear power plant structure, Marine structure, weapon and other manufacturing sectors. It is one of the most commonly used welding methods in today's welding production.

Submerged arc welding is not only used for connecting the members in the metal structure, but also can surfacing the wear resistant or corrosion resistant alloy layer on the surface of the base metal.

With the development of welding metallurgy technology and welding material production technology, submerged arc welding materials have developed from carbon structural steel to low-alloy structural steel, stainless steel, heat-resistant steel and some non-ferrous metals, such as nickel-based alloy, titanium alloy, copper alloy, etc.

From welding manual. Submerged arc welding. By wu zhiqiang