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Title: Horizontal electromagnetic casting of thin metal sheets

Abstract

Thin metal sheets are cast by magnetically suspending molten metal deposited within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled to form a solid metal sheet. Magnetic flux increases as the molten metal sheet moves downward and decreases as the molten metal sheet moves upward to stabilize the sheet and maintain it in equilibrium as it is linearly displaced and solidified by cooling gases. A conducting shield is electrically coupled to the molten metal sheet by means of either metal sheet engaging rollers or brushes on the solidified metal, and by means of an electrode in the vessel containing the molten metal thereby providing a return path for the eddy currents induced in the metal sheet by the AC coil generated magnetic flux. Variation in the geometry of the conducting shield allows the magnetic flux between the metal sheet and the conducting shield to be varied and the thickness in surface quality of the metal sheet to be controlled. Side guards provide lateral containment for the molten metal sheet and stabilize and shape the magnetic field while a leader sheet having electromagnetic characteristics similar to those ofmore » the metal sheet is used to start the casting process and precedes the molten metal sheet through the magnet and forms a continuous sheet therewith. The magnet may be either U-shaped with a single racetrack coil or may be rectangular with a pair of facing bedstead coils.« less

Inventors:
 [1];  [2];  [3];  [4]
  1. (Hinsdale, IL)
  2. (Aurora, IL)
  3. (Palos Park, IL)
  4. (Naperville, IL)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
866574
Patent Number(s):
US 4741383
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
horizontal; electromagnetic; casting; metal; sheets; cast; magnetically; suspending; molten; deposited; ferromagnetic; yoke; conducting; coils; linearly; displacing; levitated; liquid; cooled; form; solid; sheet; magnetic; flux; increases; moves; downward; decreases; upward; stabilize; maintain; equilibrium; displaced; solidified; cooling; gases; shield; electrically; coupled; means; engaging; rollers; brushes; electrode; vessel; containing; providing; return; path; eddy; currents; induced; coil; generated; variation; geometry; allows; varied; thickness; surface; quality; controlled; guards; provide; lateral; containment; shape; field; leader; characteristics; similar; start; process; precedes; magnet; forms; continuous; therewith; u-shaped; single; racetrack; rectangular; pair; facing; bedstead; conducting shield; return path; cooling gas; continuous sheet; metal sheets; characteristics similar; eddy current; magnetic flux; molten metal; magnetic field; liquid metal; metal sheet; eddy currents; vessel containing; solid metal; magnetically levitated; metal deposited; casting process; electrically coupled; racetrack coil; sheet therewith; single racetrack; bedstead coils; levitated liquid; leader sheet; solidified metal; currents induced; surface quality; conducting coils; metal deposit; moves downward; moves upward; ferromagnetic yoke; facing bedstead; electromagnetic characteristics; magnetic characteristic; linearly displacing; cooling gases; suspending molten; horizontal electromagnetic; generated magnetic; electromagnetic casting; magnetically suspending; /164/

Citation Formats

Hull, John R., Lari, Robert J., Praeg, Walter F., and Turner, Larry R. Horizontal electromagnetic casting of thin metal sheets. United States: N. p., 1988. Web.
Hull, John R., Lari, Robert J., Praeg, Walter F., & Turner, Larry R. Horizontal electromagnetic casting of thin metal sheets. United States.
Hull, John R., Lari, Robert J., Praeg, Walter F., and Turner, Larry R. Fri . "Horizontal electromagnetic casting of thin metal sheets". United States. https://www.osti.gov/servlets/purl/866574.
@article{osti_866574,
title = {Horizontal electromagnetic casting of thin metal sheets},
author = {Hull, John R. and Lari, Robert J. and Praeg, Walter F. and Turner, Larry R.},
abstractNote = {Thin metal sheets are cast by magnetically suspending molten metal deposited within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled to form a solid metal sheet. Magnetic flux increases as the molten metal sheet moves downward and decreases as the molten metal sheet moves upward to stabilize the sheet and maintain it in equilibrium as it is linearly displaced and solidified by cooling gases. A conducting shield is electrically coupled to the molten metal sheet by means of either metal sheet engaging rollers or brushes on the solidified metal, and by means of an electrode in the vessel containing the molten metal thereby providing a return path for the eddy currents induced in the metal sheet by the AC coil generated magnetic flux. Variation in the geometry of the conducting shield allows the magnetic flux between the metal sheet and the conducting shield to be varied and the thickness in surface quality of the metal sheet to be controlled. Side guards provide lateral containment for the molten metal sheet and stabilize and shape the magnetic field while a leader sheet having electromagnetic characteristics similar to those of the metal sheet is used to start the casting process and precedes the molten metal sheet through the magnet and forms a continuous sheet therewith. The magnet may be either U-shaped with a single racetrack coil or may be rectangular with a pair of facing bedstead coils.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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