| 摘要 |
The invention relates to a plasma welding process by means of a free microwave-induced plasma jet, which is generated by means of the following process steps: generation of microwaves in a high-frequency microwave source, guidance of the microwaves in a wave guide (1), introduction of a process gas at a pressure of p>=1 bar into a microwave-transparent tube (2) which comprises a gas inlet opening (4) and a gas outlet opening (3), the process gas being introduced through the gas inlet opening (4) into the microwave-transparent tube (2) in such a way that it has a tangential flow component, generation of a plasma (7) in the microwave-transparent tube (2) by means of electrodeless ignition of the process gas, generation of a plasma jet (17) by means of the introduction of the plasma (7) into the working space (16) through a metallic expansion nozzle (5) arranged at the gas outlet opening (3) of the tube (2).
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