PTA

PTA

Plasma Transferred Arc (PTA) is a versatile method of deposition of high quality, metallurgically fused coating on the surfaces of various types of components, bringing significant advantages over traditional welding processes such as oxyfuel and MIG/MAG welding.

Advantages such as soft alloys, medium and high hardness materials, and carbide compounds on a wide variety of substrates to achieve diverse properties such as mechanical strength, wear and corrosion.

Our engineers will be able to identify the best PTA coating to solve your components’ needs.

How It Works

PTA, among the welding processes, is one of the techniques that provides the greatest control of thermal energy introduced into the substrate. Its high energy melts the surface of the base material as the powder coating is inserted into the arc being cast. The inside of the torch is surrounded by a shielding gas which generates a plasma by a small auxiliary electric arc. This plasma will serve as a conductor and stabilizer for the transferred arc, which releases most of the available thermal energy. During solidification, a substrate bond is created between the powder and the base material, and the base metal may even be continuously cooled during the process.

The layer obtained in this process has a fully controllable hardness with all parameters controlled by a computer, which even controls the start and end ramps of the process, avoiding porosity when closing the electric arc.

For this reason, it is a process of excellence due to its total automation, being useful for external and internal diameters of wear bushings.