Plasma transfer Arc, PTA

Plasma Transferred Arc (PTA) and Laser Overlay processes are used with metal powders to produce protective surfaces with metallurgical bonds to the substrate. These protective attributes include:

  • Corrosion resistance.
  • Abrasion resistance.
  • Wear resistance.
  • Heat resistance.

In addition, the processes are often used to repair worn parts at a lower cost than a replacement part and with potentially longer service life than with the original materials. PTA is particularly well suited to automation and large volume production of parts with deposition rates up to 20 lbs/hr. The low heat input of the laser process results in a low heat affected zone which provides a nearly stress free overlay, fine microstructure, and high hardness. The low dilution rate and metallurgical bond provide a nearly impenetrable barrier to corrosive materials when the proper alloy is chosen and properly applied for the intended service