Cobalt alloy

Details Cobalt alloy Cobalt alloy

1974-10-21

1976-06-01

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

148 32, 148 325, C22C 1907

Patent

active

039605523

ABSTRACT:
There is disclosed a cobalt-base alloy that is ideally suited for high temperature service such as for the fabrication of cast vane parts of gas turbine engines. The alloy possesses excellent high temperature strength and corrosion resistance and exhibits extended service life in such applications. The alloy is cobalt-base and contains, as matrix alloying elements, chromium, tungsten and nickel. The alloy also contains carbon and primary carbide formers of tantalum and titanium. The chromium, cobalt and tungsten are also effective as secondary carbide formers to impart extended life to the metal under high temperature and stress conditions. In contrast to prior alloys, the alloy is free of any alloying amounts of zirconium and exhibits excellent casting characteristics. The alloy also preferably contains a significant amount of aluminum to impart the desired long service life for high temperature applications.

REFERENCES:
patent: 3432294 (1969-03-01), Wheaton

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