Method and apparatus for high vacuum casting

Details Method and apparatus for high vacuum casting Method and apparatus for high vacuum casting

B - Operations, Transporting

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B22D 7/00 (2006.01) B22D 7/10 (2006.01) B22D 9/00 (2006.01) B22D 13/02 (2006.01)

Patent

CA 1235564

METHOD AND APPARATUS FOR HIGH VACUUM CASTING ABSTRACT Method and apparatus for producing a fine-grain ingot are disclosed. A feedstock stick is melted to produce a series of fully molten drops or a stream, which falls on the upper surface of an ingot being formed, to cover a portion thereof which is substantially less than the ingot's total upper surface. The mold is moved laterally with respect to the feedstock stick at a rate which is high enough to that the molten metal impinges upon different portions of the ingot's upper surface but which is low enough to prevent a substantial centrifugally outward flow of the metal impinging on the upper surface of the ingot. The molten metal melt rate is so selected that the impact region on the ingot's upper surface is at or below the solidus temperature of the alloy and above a temperature at which metallurgical bonding with the successive impinging metal can occur.

471617

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