PTA HARDFACING

(See PICTURES at the bottom of this page)


The PTA hardfacing process allows the deposition of most of noble materials available in allied or composite powder forms. The operating principle lies in a permanent tungsten electrode (cathode) and a copper nozzle (anode) between which a pilot arc is first established through a plasma gas being ionized. A second power source then transfers the plasma column toward the substrate to be welded. The powders fall into this transferred plasma, with the help of a carrier gas, while the molten pool is protected by a much more considerable flow of inert shield gas.



Characteristics :

•  Ease of automation because of the inherent arc stability and precision of the process. Reliable and reproducible parameters.

•  Absolute control of the heat-affected zone for minimizing dilution of the base metal, part deformation, and dissolution of any hard phases.

•  «Focus» mode, ideal for precision components, competitive and more versatile alternative to the laser cladding and spray-and-fuse processes.

•  «Power» mode, ideal for specialty wear plates, allows a higher deposition rate while maintaining the heat input below the common practice average.