Nickel-base superalloys

Details Nickel-base superalloys Nickel-base superalloys

1978-01-09

1980-06-10

Steiner, Arthur J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

148 325, C22C 1905

Patent

active

042070988

ABSTRACT:
Nickel-base superalloys suitable for the production of cast parts for use at elevated temperatures in corrosive atmospheres contain in weight percent about 14% to 22% chromium, 5% to 25% cobalt, 1% to 5% tungsten, 0.5% to 3% tantalum, 2% to 5% titanium, 1% to 4.5% aluminum, the sum of the titanium plus aluminium being 4.5 to 9% up to 2% niobium, 0.31% to 1.2% boron, up to 3.5% molybdenum, up to 0.5% zirconium, up to 0.2% in total of yttrium or lanthanum or both, up to 0.1% carbon, the balance apart from impurities being nickel. Advantageously the alloys are controlled such that

REFERENCES:
patent: 3146136 (1964-08-01), Bird et al.
patent: 3155501 (1964-11-01), Kaufman et al.
patent: 3459545 (1969-08-01), Bieber et al.
patent: 3486887 (1969-12-01), Yoda et al.
patent: 3649378 (1972-03-01), Kotval
patent: 3677747 (1972-07-01), Lund et al.
patent: 3865581 (1975-02-01), Sekino et al.
patent: 3918964 (1975-11-01), Baldwin et al.
patent: 4082581 (1978-04-01), Ghosh
Khimiushin, "High Temp. Steels & Alloys", FTD-HC-23-391-70, Part I, pp. 398-400.

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