Plasma powder build-up welding (PPA)

Plasma powder cladding is a thermal coating process that is primarily used to produce wear and corrosion-resistant coatings.

The PTA process works with two independent arcs. The non-transferred pilot arc burns between the negatively poled tungsten electrode and the positively poled plasma gas nozzle.

This ionizes the arc gap between the electrode and the positively poled workpiece, which leads to the formation of the transferred main arc under a corresponding voltage.

The workpiece is melted by the main arc and the metal powder supplied also liquefies, forming the build-up layer.

Welding is fully automated with the help of a 6-axis robot from Kuka.

Technichal Data

Technichal Parameter PSI 400

Mains voltage	400 V
Pilot arc
Open circuit voltage	75 V
Einstellbereich	4 - 160 A
Main arc
Open circuit voltage	60 V
Setting range	4 - 400 A