Method of operating an electron beam furnace

Details Method of operating an electron beam furnace Method of operating an electron beam furnace

1990-07-19

1992-03-31

Andrews, Melvin J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

21912117, 21912135, 373 10, 164494, C22B 400

Patent

active

051004631

ABSTRACT:
In the representative embodiment described in the specification, an electron beam furnace has an evacuation system which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 microns Hg. The relatively high pressure reduces degassing time from a cold start, suppresses volatilization of constituents of metal being refined, and causes volatilized metal to condense in powder form on a condensing screen. A vibrator assists in removing the powder from the condensing screen. The electron beam gun has a series of compartments which are individually evacuated to maintain the pressure in the compartment containing the cathode at a level less than about 1 micron Hg.

REFERENCES:
patent: 3005859 (1961-10-01), Candidus
patent: 3211548 (1965-10-01), Scheller et al.
patent: 3342250 (1967-09-01), Treppschuh et al.
patent: 4027722 (1977-06-01), Hunt
patent: 4482376 (1976-11-01), Tarasescu et al.

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