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 Laboratory (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 B08 - CLEANING B08B - CLEANING IN GENERAL
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}
}