2017/10/06

溶接方法(1)ガスタングステンアーク溶接(GTAW)とプラズマアーク溶接(PAW)

 

Gas Tungsten Arc Welding (GTAW)


Gas tungsten arc welding(GTAW) calls TIG(tungsten inert gas) a kind of arc welding。Using non-expendable tungsten electrodes、inert or semi-inert shielding gas,they used argon or mixed gas, as well as additional solder (filler welding).This process has a stable electrical arc and high welding quality, especially for stainless steel of welding.

 

Plasma Arc Welding (PAW)


The principle of plasma arc welding (PAW) is similar to that of gas tungsten arc welding (GTAW). The difference is that the structure of the torch. Plasma arc welding (PAW) using a shrink-shaped nozzle, using two supply systems, one is ionized gas, the other is shielding. The plasma beam through the shrink-shaped nozzle, the heat concentration, that can get deeper penetration、higher melting rate and welding speed. The HAZ (Heat Affected Zone) of weld bead is relatively small compared with GTAW.