Plasma arc process with reactive gases

Details Plasma arc process with reactive gases Plasma arc process with reactive gases

B - Operations, Transporting

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B23K 9/00 (2006.01) B23K 10/00 (2006.01) B23K 35/38 (2006.01) H05H 1/32 (2006.01)

Patent

CA 1208303

- 15 - Abstract A plasma arc process and a combination plasma arc torch and nozzle assembly in which the arc plasma gas composition contains at least 50% oxygen. An oxygen containing reactive gas is passed through a gap between a first and second nozzle body of a nozzle assembly having a first and second arc constricting passageway adapted to constrict the arc plasma. The width of the gap is of a critical dimension to permit a tungsten electrode to be used without suffering from rapid electrode erosion.

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