Skip to Content
Find More Like This
Return to Search

Control of electrode depth in electroslag remelting

United States Patent

December 17, 2002
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A method of and apparatus for controlling an electroslag remelting furnace by driving the electrode at a nominal speed based upon melting rate and geometry while making minor proportional adjustments based on a measured metric of the electrode immersion depth. Electrode drive speed is increased if a measured metric of electrode immersion depth differs from a set point by a predetermined amount, indicating that the tip is too close to the surface of a slag pool. Impedance spikes are monitored to adjust the set point for the metric of electrode immersion depth based upon one or more properties of the impedance spikes.
Melgaard; David K. (Albuquerque, NM), Shelmidine; Gregory J. (Tijeras, NM), Damkroger; Brian K. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
09/ 825,684
April 3, 2001
GOVERNMENT RIGHTS The Government has rights to this invention pursuant to Contract No. DE-AC04-94AL85000 awarded by the U.S. Department of Energy.