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Title: Electromagnetic augmentation for casting of thin metal sheets

Abstract

Thin metal sheets are cast by magnetically levitating molten metal deposited in a model within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled by the water-cooled walls of the mold to form a solid metal sheet. A conducting shield is electrically coupled to the molten metal sheet to provide a return path for eddy currents induced in the metal sheet by the current in the AC conducting coils. In another embodiment, a DC conducting coil is coupled to the metal sheet for providing a direct current therein which interacts with the magnetic field to levitate the moving metal sheet. Levitation of the metal sheet in both molten and solid forms reduces its contact pressure with the mold walls while maintaining sufficient engagement therebetween to permit efficient conductive cooling by the mold through which a coolant fluid may be circulated. 8 figs.

Inventors:
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
7017689
Patent Number(s):
6113707
Assignee:
ANL; ERA-14-000976; EDB-88-184354
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29D - PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23K - SOLDERING OR UNSOLDERING
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; METALS; CASTING; CASTING MOLDS; COOLANTS; EDDY CURRENTS; EFFICIENCY; ELECTROMAGNETIC FIELDS; INVENTIONS; LEVITATION; MAGNETS; SHEETS; WEAR; CURRENTS; ELECTRIC CURRENTS; ELEMENTS; FABRICATION; 360101* - Metals & Alloys- Preparation & Fabrication

Citation Formats

Hull, J R. Electromagnetic augmentation for casting of thin metal sheets. United States: N. p., 1987. Web.
Hull, J R. Electromagnetic augmentation for casting of thin metal sheets. United States.
Hull, J R. Wed . "Electromagnetic augmentation for casting of thin metal sheets". United States.
@article{osti_7017689,
title = {Electromagnetic augmentation for casting of thin metal sheets},
author = {Hull, J R},
abstractNote = {Thin metal sheets are cast by magnetically levitating molten metal deposited in a model within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled by the water-cooled walls of the mold to form a solid metal sheet. A conducting shield is electrically coupled to the molten metal sheet to provide a return path for eddy currents induced in the metal sheet by the current in the AC conducting coils. In another embodiment, a DC conducting coil is coupled to the metal sheet for providing a direct current therein which interacts with the magnetic field to levitate the moving metal sheet. Levitation of the metal sheet in both molten and solid forms reduces its contact pressure with the mold walls while maintaining sufficient engagement therebetween to permit efficient conductive cooling by the mold through which a coolant fluid may be circulated. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {10}
}