Method in manufacturing blades or vanes of turbines

Details Method in manufacturing blades or vanes of turbines Method in manufacturing blades or vanes of turbines

1990-05-31

1991-03-19

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Heat and pressure simultaneously to effect sintering

419 38, B22F 500

Patent

active

050009117

ABSTRACT:
The invention relates to a method for manufacturing a blade or vane of a turbine. A master of the blade or the vane is made of steel, and silicon rubber is molded around said master. The mold thus obtained is cut open and removed from the master to be used for producing a model of wax or the like, a mixture of graphite powder and a cement then being molded around said model. The model is melted and removed from the graphite mold which is filled with a compacted powder of metal or metal alloy. The mold with the powder compacted therein is isostatically hot pressed and then the mold is removed from the produced molded body by blasting.

REFERENCES:
patent: 3841870 (1974-10-01), Hamjian
patent: 4096615 (1978-06-01), Cross
patent: 4368074 (1983-01-01), Otto et al.
patent: 4735656 (1988-04-01), Schaefer et al.
IBM Technical Disclosure Bulletin, vol. 24, No. 7A.

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