Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Welded – cemented or fused
Patent
1990-08-14
1991-06-18
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Specific working member mount
Welded, cemented or fused
416244A, 298892, F01D 100, F01D 2500
Patent
active
050245821
ABSTRACT:
This invention provides stream turbine components, such as rotor disc, which include a ring member comprising a low alloy ferrous base metal having less than about 6 wt. % alloy ingredients and a ferrous graded layer disposed on the ring member which includes a plurality of layered weldments having an increasing weight percentage of a layering metal containing Cr. Disposed on the graded layer of this invention is a Cr-containing steeple alloy disposed on the graded layer for optimizing a life extending property of the steeple region of the turbine component.
REFERENCES:
patent: 2440069 (1948-04-01), Bloomberg
patent: 3590454 (1971-07-01), Brass
patent: 4152816 (1979-05-01), Ewing et al.
patent: 4224360 (1980-09-01), Ohnishi et al.
patent: 4633554 (1987-01-01), Clark et al.
Clark, R. E. et al., Experience with Weld Repair of Low Pressure Steam Turbine Rotors, 47th American Power Conference, Chicago, Ill., printed by Westinghouse.
Electric Corporation, Power Generation, Orlando, Fla.
Clark, R. E. et al., Development of the Techniques for High Pressure Rotor Weld Repair, Westinghouse and Mitsubishi Tech. Seminar, Takasago, Japan, Jul. 1987, proprietary document of Westinghouse.
Sermatech Review "New Services for Industrial Turbines", No. 31 (Winter, 1988).
Bellows James C.
Koubek, III Rudolph
Look Edward K.
Nguyen Hoang
Westinghouse Electric Corp.
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