In the PTA process, a high density plasma arc obtained by ionization of Argon gas passes through the electric arc into the welding by the tungsten electrode (-) and the plasma nozzle (+). Then, the transferred arc produces the energy needed to melt both the base metal and the filler metal and projects the molten metal on the work surface.
Advantages of PTA:
- Produces tougher overlays
- Easy automation offers a high degree of reproducibility
- High powder utilization and low dilution rate
- Many surface can be produced with various materials to meet special applications
