Method and apparatus for generating a plasma arc.

摘要

A method and apparatus for generating a plasma arc (a) for use in arc welding, arc transformation hardening, minute working, etc. A plasma gas (101) used for generating the plasma arc includes xenon and up to 50% by volume of argon, neon and or helium. A tungsten electrode (12) having a diameter of 0.5 millimetres or less is used. Thus, an extremely low plasma arc current of 0.1 amperes or less can be produced in a stabilised manner.