Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1997-01-29
1998-11-10
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164113, 164900, B22D 1714
Patent
active
058329820
ABSTRACT:
Methods for semisolid manufacturing of precision parts, turbine rotors for example, comprised of high melting point alloys are given. Generally, a semisolid/thixotropic process is operated under vacuum utilizing a removable mold. The process preferably comprises a vacuum chamber, an inductive heater to bring a high melting point alloy to a thixotropic phase, a supercooled mold comprised of a low melting point alloy or metal, and a plunger that accelerates and injects the high melting point alloy into the low melting point mold. As the formed part cools, the supercooled low melting point mold heats up to its melting point upon which separation from the formed part occurs. Supercooling of the removable mold permits the use of thixotropic methods for high melting point alloys.
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Nielsen Timothy A.
Prosser James S.
Schimmel William P.
Williams Samuel B.
Lin Kuang Y.
Williams International Co. L.L.C.
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