Method of hard surfacing by plasma torch

Details Method of hard surfacing by plasma torch Method of hard surfacing by plasma torch

1976-10-28

1978-08-01

Goldberg, E. A.

Electric heating

Metal heating

For deposition welding

219121P, 219123, 219160, B23K 904

Patent

active

041045050

ABSTRACT:
The plasma torch of this disclosure provides a shielded plasma arc using an external powder feed and an inert gas shield. The torch of this disclosure has a smaller outside diameter than prior art torches and allows better orientation of the torch with respect to a substrate to be hard faced. A method of hard surfacing an article, preferably using the torch of this invention, is also disclosed. The rotation of the article, a valve body, is controlled during hard facing to prevent deflects.

REFERENCES:
patent: 2357170 (1944-08-01), Burggraf
patent: 2920183 (1960-01-01), Greene
patent: 3283205 (1966-11-01), DeBolt
patent: 3743815 (1973-07-01), Woods

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