Plasma Transferred Arc (PTA) Cladding

Cladding is complementary to the thermal spray coating process and Thermaspray specialises in applying advanced weld hard-facing using the Plasma Transferred Arc (PTA) process.

PTA welding is a hard-facing process that heats metals and merges them by means of arc constriction.

The advantages of PTA welding over conventional weld hard-facing technologies are that PTA weld deposits are characterised by low levels of inclusions, oxides and discontinuities, and the weld hard-facing closely mimics the corrosion resistance of the base alloy.

Most critically, the careful control of heat input makes it possible to control weld dilution to less than 5%, which is critical for many high-performance alloys.