Associated Plasmatron Private Limited

Plasma Transferred Arc Process ( PTA Process ) is used to fuse a metallic coating to a  substrate in order to improve its resistance against wear  and/or corrosion.

During the process, metal powder is fed into a molten weld puddle (fusion bath) generated by the plasma arc at high temperature (up  to 20,000 °C).
All welding parameters, including powder feed, power input, plasma gas and shielding gas, as well as torch and work piece movement are automatized and computer controlled in PLASMA TEAM equipment.

PTA hard facing is a true welding process, with a metallic bond between the substrate and deposit.

The core of PTA process is PLASMA . The plasma  (a gas sufficiently ionized to be electrically conductive) can be viewed as the natural state of  matter (the so called fourth state of matter),  with the other states existing only as variants  to the normal.

In PTA hard facing, two DC power supplies are used to first establish a non-transferred arc ( pilot arc ) between the tungsten electrode (-)  and the anodic nozzle (+) and then a transferred arc between the tungsten electrode (-) and the work piece (+).