05 Jun,2024

Tip:Plasma arc welding method

Tip:Plasma arc welding method

Plasma arc welding is also a non-melting electrode arc welding. It uses the compressed arc (called forward transfer arc) between the electrode and the workpiece to achieve welding. The electrode used is usually tungsten. The plasma gas that produces the plasma arc can be argon, nitrogen, helium or a mixture of the two. At the same time, it is protected by inert gas through the nozzle. Filler metal can be added or not during welding.

During plasma arc welding, due to its straight arc and high energy density, the arc has strong penetration ability. The pinhole effect produced during plasma arc welding can be used for most metals within a certain thickness range without beveling, and can ensure that the penetration and weld are uniform.

Therefore, plasma arc welding has high productivity and good weld quality. However, plasma arc welding equipment (including nozzles) is relatively complex and requires high control of welding process parameters.

Most metals that can be welded by tungsten gas shielded arc welding can be welded by plasma arc welding. In comparison, plasma arc welding can be easier to carry out for welding of extremely thin metals below 1mm.