Shroud for gas turbines

Details Shroud for gas turbines Shroud for gas turbines

1985-07-11

1986-10-07

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Including heat insulation or exchange means

Working fluid on at least one side of heat exchange wall

415180, 415200, 415170R, 415139, 148442, 148327, 428678, 420584, 420585, 420 36, 420 38, 420 47, 420 48, F01D 2512, F01D 1108

Patent

active

046156585

ABSTRACT:
This invention relates to an improvement on material of a shroud for gas turbines. The material comprises 0.25-0.7 wt % C, 20-35 wt % Cr, 20-40 wt % Ni and balance Fe, and has an austenitic structure. The amount of the .sigma.-phase in this invention is less than 5% and Nv value (Electron Vacancy Number) is less than 2.8.

REFERENCES:
patent: 2801916 (1957-08-01), Harris et al.
patent: 2857266 (1958-10-01), Anger
patent: 3135602 (1964-06-01), Eberle
patent: 3505028 (1970-04-01), Douthit
patent: 3617261 (1971-11-01), Lherbier
patent: 3794445 (1974-02-01), Watanabe et al.
patent: 3957545 (1976-05-01), Mimino et al.
patent: 3975112 (1976-08-01), Brown et al.
patent: 4086107 (1978-04-01), Tanino et al.
patent: 4169020 (1979-09-01), Stalker et al.
Stainless and Heat-Resisting Steels Products Manual, AISI, 1974, U.S. Stainless and Heat-Resistant Steels Table.

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