Novel cobalt-base superalloy and cast and welded industrial gas

Details Novel cobalt-base superalloy and cast and welded industrial gas Novel cobalt-base superalloy and cast and welded industrial gas

1986-07-14

1990-07-03

Dear, R.

Metal treatment

Compositions

Heat treating

148158, 148408, 428668, C22F 110

Patent

active

049388053

ABSTRACT:
Cobalt-base superalloys having special utility in the production of industrial gas turbine hot gas path components because of their unique combination of properties in specially heat-treated condition including excellent hot corrosion resistance, stress-rupture strength at high temperature, metallurgical stability, tensile ductility and weldability, consist essentially of 0.3 to 0.6% carbon, 27-35% chromium, 9-16% nickel, 6-9% tungsten, 0.45 to 2.0% tantalum, up to 3.0% hafnium, up to 0.7% zirconium, not more than 2.0% iron, 1.5% manganese and silicon and 0.05% boron, balance cobalt, the carbide formers being selected to satisfy the following equations: ##EQU1##

REFERENCES:
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patent: 3314784 (1967-04-01), McQuillan et al.
patent: 3333957 (1967-08-01), Thielemann
patent: 3366478 (1968-01-01), Wheaton
patent: 3383205 (1968-05-01), Sims et al.
patent: 3432294 (1969-03-01), Wheaton
patent: 3549356 (1970-12-01), Sims et al.
patent: 3582320 (1971-06-01), Herchenroeder
patent: 3933484 (1976-07-01), Costin
patent: 4437913 (1984-03-01), Fukui et al.

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