Metal working – Method of mechanical manufacture – Impeller making
Patent
1998-10-29
2000-04-11
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
2988971, 298896, 29558, B21D 3903
Patent
active
060474742
ABSTRACT:
A receiving cavity having a simple geometrical shape is machined in a metallic block having a simple geometrical shape made of a first metallic material. A member made of the second material is made and fixed into the cavity to produce a composite bimetallic block, and the turbine blade is machined from the composite block, the body of the blade being machined from the metallic block made of the first material and the insert being machined from the member of simple shape made of the second material. The member made of the second material can be prefabricated and welded into the cavity of made by depositing and solidifying a molten metal in the cavity. The invention applies in particular to manufacturing a blade of a low-pressure stage of a steam turbine.
REFERENCES:
patent: 5062205 (1991-11-01), Fraser
patent: 5183390 (1993-02-01), Amos
patent: 5351395 (1994-10-01), Crawmer et al.
Gonserovskii, F.G., et al., "Efficiency of welding methods for repairing steam turbine blades and hardening their inlet edges," Welding Intl., vol. 8, No. 5, Jan. 1, 1994, pp. 390-393.
Leroy Daniel
Millet Francois
Cuda Irene
Framatome
LandOfFree
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