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Controlling electrode gap during vacuum arc remelting at low melting current

United States Patent

*** EXPIRED ***
April 15, 1997
View the Complete Patent at the US Patent & Trademark Office
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An apparatus and method for controlling electrode gap in a vacuum arc remelting furnace, particularly at low melting currents. Spectrographic analysis is performed of the metal vapor plasma, from which estimates of electrode gap are derived.
Williamson; Rodney L. (Albuquerque, NM), Zanner; Frank J. (Sandia Park, NM), Grose; Stephen M. (Glenwood, WV)
Sandia Corporation (Albuquerque, NM)
08/ 426,532
April 21, 1995
GOVERNMENT RIGHTS The Government has rights to this invention pursuant to Contract No. DE-AC04-76DP00789 awarded by the U.S. Department of Energy.