Heat resistant low expansion alloy

Details Heat resistant low expansion alloy Heat resistant low expansion alloy

1977-12-14

1980-04-29

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75122, 75134F, 148 325, C22C 1905, C22C 3000, C22C 3806, C22C 3848

Patent

active

042004594

ABSTRACT:
Nickel-iron base alloy characterized by controlled thermal expansion coefficient and inflection temperature and by desirable high strength in age-hardened condition has composition specially restricted to overcome detrimental sensitivity to stress-concentrating geometries and aid resistance to long-enduring stress in heated oxidizing atmospheres. The alloy contains, by weight, 34% to 55.3% nickel, up to 25.2% cobalt, 1% to 2% titanium, 1.5% to 5.5% of columbium plus 1/2 the weight percent of any tantalum, up to 1% chromium, not more than 0.2% aluminum and the balance essentially iron.

REFERENCES:
patent: 3157495 (1964-11-01), Eiselstein et al.
patent: 3705827 (1972-12-01), Muzyka et al.
patent: 3971677 (1976-07-01), Mason et al.
patent: 4006011 (1977-02-01), Muzyka et al.
patent: 4026699 (1977-05-01), Eiselstein et al.
patent: 4066447 (1978-01-01), Smith et al.
patent: 4078951 (1978-03-01), Denzine et al.
Muzyka et al., "Phys. Met. . . . Controlled-Expansion Superalloys", Jr. of Metals, Jul. 1975 11 .
Eiselstein et al., "New Ni-Fe-Co Alloys . . . ", Met. Design Engineering, 62 (1965) 105.

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