Metal working – Method of mechanical manufacture – Impeller making
Patent
1991-12-12
1993-03-16
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
2940207, 2940218, 164103, B23P 1502
Patent
active
051932725
ABSTRACT:
A process for the repair of single-crystal drive blades, such as turbine blades, in which a sound portion of the blade is inserted into an open bottom of a casting mold in communication with a casting cavity in the mold adopted to the shape of the blade. The molten metal is then cast into the mold to unite with the sound portion and an epitaxial single-crystal solidification of the melt is produced on the sound portion to form the entire blade. A part of the sound portion has an outer surface layer thereof removed to expose a core region which is constituted of substantially pure single crystal material prior to casting. The sound part is secured in a holder which is coupled to the casting mold for only a matter of seconds before the molten metal is cast into the mold.
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Staub Fritz
Walser Bruno
Wortmann Jurgen
Cuda Irene
Sulzer-MTU Casting Technology GmbH
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