Metal founding – Process – Disposition of a gaseous or projected particulate molten...
Patent
1987-12-24
1989-02-14
Godici, Nicholas P.
Metal founding
Process
Disposition of a gaseous or projected particulate molten...
164122, 164900, 118320, B22D 2506, B22D 2709
Patent
active
048040347
ABSTRACT:
A method of casting is provided in which a rheocast deposit is formed by atomizing a stream of molten metal or metal alloy by subjecting the stream of molten metal or metal alloy to relatively cold gas directed at the stream, and directing the resultant spray of metal droplets at a collector. The deposit is provided with a rheocast type structure by extracting heat from the metal droplets such that the material deposited at the collector includes solid phase particles in a liquid phase which, upon solidification, forms a microstructure characterized by a fine network of microsegregate at the grain boundaries or coring across the grains and which, above the solidus region of the said metal or metal alloy, exhibits thixotropic properties. The rheocast deposit may be thixotropically deformed either during or after deposition.
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Leatham Alan
Ogilvy Andrew
Godici Nicholas P.
Heinrich Samuel M.
Osprey Metals Limited
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