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US 3,939,895 AGranted
Method for casting directionally solidified articles
AssigneeGeneral Electric Company
InventorThomas F. Sawyer
Life of this patent
Estimating the term…
Abstract
The invention relates to a method of casting superalloy articles and more particularly to directionally solidifying eutectic superalloy compositions to produce a composite structure of a superalloy matrix reinforced with aligned carbide fibers.
Claims7
A method of producing a directionally solidified cast alloy article in a shell mold, said method comprising
- providing a mold having a cavity divided into an upper portion and a lower portion, said mold being disposed in a heating zone,
- placing one end of a longitudinal heat extractor element of said alloy into the lower portion of the cavity, said other end of said heat extractor extending therefrom and being exposed to a continuous flow of fluid coolant,
- heating said mold and said one end of said heat extractor placed therein at a temperature above the melting range of said alloy to melt a portion of said one end of the heat extractor,
- filling said mold with said alloy in a molten state, and
- controllably lowering said mold out of the heating zone to allow said mold and contents thereof to cool and to establish directional solidification of the alloy in said cavity.
2 more elements
Dependencies are inferred from the claim text.