Nickel-base alloy

Details Nickel-base alloy Nickel-base alloy

2006-03-21

2006-03-21

Sheehan, John P. (Department: 1742)

Metal treatment

Stock

Nickel base

C148S410000, C420S447000, C420S448000, C420S449000

Reexamination Certificate

active

07014723

ABSTRACT:
Castable and weldable nickel-base alloys that exhibit a desirable balance of strength and resistance to corrosion and oxidation suitable for gas turbine engine applications. The alloy contains, by weight, about 10% to about 25% cobalt, about 20% to about 28% chromium, about 1% to about 3% tungsten, about 1.6% to about 3.8% aluminum, about 0.4% to about 1.5% titanium, where the sum of aluminum and titanium is about 1.8% to about 5.0%, about 0.5% to about 1.5% columbium, 0.5% to about 1.5% tantalum, about 0.001% to about 0.025% boron, about 0.05% maximum zirconium, about 0.02% to about 0.15% carbon, with the balance essentially nickel and incidental impurities. The alloy may more preferably contain about 2.8% to about 3.8% aluminum where the sum of aluminum and titanium is about 3.0% to about 5.0%, or about 1.6% to about 2.8% aluminum, where the sum of aluminum and titanium is about 1.8% to about 4.3%.

REFERENCES:
patent: 4140555 (1979-02-01), Garcia et al.
patent: 4219592 (1980-08-01), Anderson et al.
patent: 4810467 (1989-03-01), Wood et al.
patent: 4981644 (1991-01-01), Chang
patent: 6258317 (2001-07-01), Smith et al.
patent: 61-73853 (1986-04-01), None

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