What kinds of protection methods when welding, the main application in which welding methods

There are 5 types of welding.

1, electrode arc welding:

Application - widely used in shipbuilding, boilers and pressure vessels, machinery manufacturing, building structures, chemical equipment and other manufacturing and maintenance industries. Suitable for (in the above industries) a variety of metal materials, a variety of thickness, a variety of structural shape of the welding.

2, submerged arc welding (automatic welding):

Application - widely used in shipbuilding, boilers, bridges, cranes and metallurgical machinery manufacturing industry. Where the weld can be maintained in a horizontal position or tilt angle of the weldment is not large, are available submerged arc welding. Plate thickness needs to be greater than 5 mm (anti-burn-through). Welding of carbon structural steel, low alloy structural steel, stainless steel, heat-resistant steel, composite steel and so on.

Welding

Non-ferrous metals, cast iron and stainless steel, should also be used in welding powder (flux), to eliminate coverage on the surface of the weld metal and the molten pool of the refractory oxide film and other impurities, and in the formation of a layer of molten slag on the surface of the molten pool to protect the molten pool of metal is not oxidized, to exclude the molten pool of gases, oxides and other impurities, to improve the mobility of the molten metal to make the welding smooth and to ensure quality and shape. Ensure quality and molding.