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Title: Control of electrode depth in electroslag remelting

Abstract

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.

Inventors:
 [1];  [2];  [1]
  1. (Albuquerque, NM)
  2. (Tijeras, NM)
Publication Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
874950
Patent Number(s):
US 6496530
Assignee:
Sandia Corporation (Albuquerque, NM) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
control; electrode; depth; electroslag; remelting; method; apparatus; controlling; furnace; driving; nominal; speed; based; melting; rate; geometry; minor; proportional; adjustments; measured; metric; immersion; drive; increased; differs; set; predetermined; amount; indicating; tip; close; surface; slag; pool; impedance; spikes; monitored; adjust; properties; predetermined amount; melting furnace; /373/

Citation Formats

Melgaard, David K., Shelmidine, Gregory J., and Damkroger, Brian K. Control of electrode depth in electroslag remelting. United States: N. p., 2002. Web.
Melgaard, David K., Shelmidine, Gregory J., & Damkroger, Brian K. Control of electrode depth in electroslag remelting. United States.
Melgaard, David K., Shelmidine, Gregory J., and Damkroger, Brian K. Tue . "Control of electrode depth in electroslag remelting". United States. https://www.osti.gov/servlets/purl/874950.
@article{osti_874950,
title = {Control of electrode depth in electroslag remelting},
author = {Melgaard, David K. and Shelmidine, Gregory J. and Damkroger, Brian K.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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