Process and apparatus for repair of drive blades such as turbine

Details Process and apparatus for repair of drive blades such as turbine Process and apparatus for repair of drive blades such as turbine

1993-01-06

1993-11-16

Lin, Kuang Y.

Metal founding

Means to apply vacuum directly to work or to hold or...

Means applying vacuum or suction directly to molten casting...

164258, 164 921, B22D 1800, B22D 1910

Patent

active

052614808

ABSTRACT:
A process and apparatus 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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patent: 5086968 (1992-02-01), Fawley
patent: 5092942 (1992-03-01), Fraser
patent: 5109606 (1992-05-01), DeMichael

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