Dynamic control of remelting processes
Abstract
An apparatus and method of controlling a remelting process by providing measured process variable values to a process controller; estimating process variable values using a process model of a remelting process; and outputting estimated process variable values from the process controller. Feedback and feedforward control devices receive the estimated process variable values and adjust inputs to the remelting process. Electrode weight, electrode mass, electrode gap, process current, process voltage, electrode position, electrode temperature, electrode thermal boundary layer thickness, electrode velocity, electrode acceleration, slag temperature, melting efficiency, cooling water temperature, cooling water flow rate, crucible temperature profile, slag skin temperature, and/or drip short events are employed, as are parameters representing physical constraints of electroslag remelting or vacuum arc remelting, as applicable.
- Inventors:
-
- Dublin, CA
- Albuquerque, NM
- Austin, TX
- Clinton, NY
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 873226
- Patent Number(s):
- 6115404
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05B - ELECTRIC HEATING
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- dynamic; control; remelting; processes; apparatus; method; controlling; process; providing; measured; variable; values; controller; estimating; model; outputting; estimated; feedback; feedforward; devices; receive; adjust; inputs; electrode; weight; mass; gap; current; voltage; position; temperature; thermal; boundary; layer; thickness; velocity; acceleration; slag; melting; efficiency; cooling; water; flow; rate; crucible; profile; drip; events; employed; parameters; representing; physical; constraints; electroslag; vacuum; applicable; water temperature; water flow; temperature profile; electrode gap; process control; control device; cooling water; flow rate; boundary layer; process variable; process controller; layer thickness; remelting process; electroslag remelting; variable values; feedforward control; electrode weight; electrode position; /373/
Citation Formats
Bertram, Lee A, Williamson, Rodney L, Melgaard, David K, Beaman, Joseph J, and Evans, David G. Dynamic control of remelting processes. United States: N. p., 2000.
Web.
Bertram, Lee A, Williamson, Rodney L, Melgaard, David K, Beaman, Joseph J, & Evans, David G. Dynamic control of remelting processes. United States.
Bertram, Lee A, Williamson, Rodney L, Melgaard, David K, Beaman, Joseph J, and Evans, David G. Sat .
"Dynamic control of remelting processes". United States. https://www.osti.gov/servlets/purl/873226.
@article{osti_873226,
title = {Dynamic control of remelting processes},
author = {Bertram, Lee A and Williamson, Rodney L and Melgaard, David K and Beaman, Joseph J and Evans, David G},
abstractNote = {An apparatus and method of controlling a remelting process by providing measured process variable values to a process controller; estimating process variable values using a process model of a remelting process; and outputting estimated process variable values from the process controller. Feedback and feedforward control devices receive the estimated process variable values and adjust inputs to the remelting process. Electrode weight, electrode mass, electrode gap, process current, process voltage, electrode position, electrode temperature, electrode thermal boundary layer thickness, electrode velocity, electrode acceleration, slag temperature, melting efficiency, cooling water temperature, cooling water flow rate, crucible temperature profile, slag skin temperature, and/or drip short events are employed, as are parameters representing physical constraints of electroslag remelting or vacuum arc remelting, as applicable.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}
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Works referenced in this record:
Metal transfer during vacuum consumable arc remelting
journal, June 1979
- Zanner, F. J.
- Metallurgical Transactions B, Vol. 10, Issue 2
Arc voltage distribution properties as a function of melting current, electrode gap, and CO pressure during vacuum arc remelting
journal, October 1997
- Williamson, Rodney L.; Zanner, Frank J.; Grose, S. M.
- Metallurgical and Materials Transactions B, Vol. 28, Issue 5
Controlling remelting processes for superalloys and aerospace Ti alloys
journal, March 1998
- Melgaard, D. K.; Williamson, R. L.; Beaman, J. J.
- JOM, Vol. 50, Issue 3