Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent
1991-03-29
1992-09-22
Shaw, Clifford C.
Electric heating
Metal heating
Nonatmospheric environment at hot spot
219 72, B23K 924
Patent
active
051499320
ABSTRACT:
A gas/arc electrode for use under vacuum conditions wherein a first housing encloses a second housing, with an end of the second housing extending through an opening in the first housing and having therein an outlet orifice. Provisions are made for circulating a coolant through the first housing to surround and cool the second housing. An electrical current and a gas, such as argon, as passed through the second housing, with the current flowing through a narrow stream of the ionized gas flowing through the outlet orifice to a workpiece to be treated. The second housing forms a chamber which has a cross sectional area, in a plane perpendicular to the direction of gas flow, of at least ten times the cross sectional area of the outlet orifice such that a gas pressure can be maintained in the chamber to reduce erosion of the chamber walls.
Poorman Richard M.
Weeks Jack L.
Broad, Jr. Robert L.
Manning John R.
Miller Guy M.
Shaw Clifford C.
The United States of America as represented by the Administrator
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