Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1984-09-28
1986-04-22
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164459, 164900, B22D 2702, B22D 1100
Patent
active
045835802
ABSTRACT:
A method is described for continuously casting an ingot of a metal alloy of a type having a substantial liquidus-solidus temperature range to produce internal microstructure of a desired fineness. Molten alloy is flowed along an electron beam heated skulled hearth while controlling the electron beam to maintain a solids content in the alloy on the hearth of between about 15% and about 40%. The alloy is poured from the hearth into the top of a continuous casting mold at a rate which produces a thixotropic region at the upper end of the fully solidified alloy in the mold. The ingot produced is characterized by a macrostructure in excess of one millimeter average grain dimensions with a non-uniform shape, orientation, and distribution, and is characterized by a microstructure of the order of fifty micron cell spacing of dendritic crystallites comprising the microstructure.
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"Production of Superclean Material for Electronic and Power-Generator Application," H. Stephan, W. Dietrich, pp. 1-56, May 6, 1984.
Electro Metals, a division of Demetron, Inc.
Lin Kuang Y.
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