Nickel-base-alloy

Details Nickel-base-alloy Nickel-base-alloy

2005-06-07

2005-06-07

Sheehan, John P (Department: 1742)

Metal treatment

Stock

Nickel base

C420S448000, C420S449000, C420S450000, C420S451000, C420S460000

Reexamination Certificate

active

06902633

ABSTRACT:
A nickel-base alloy consists of, by weight, about 15.0 to about 17.0% chromium, about 7.0 to about 10.0% cobalt, about 1.0 to about 2.5% molybdenum, about 2.0 to about 3.2% tungsten, about 0.6 to about 2.5% columbium, less than 1.5% tantalum, about 3.0 to about 3.9% aluminum, about 3.0 to about 3.9% titanium, about 0.005 to about 0.060% zirconium, about 0.005 to about 0.030% boron, about 0.07 to about 0.15% carbon, the balance nickel and impurities. Preferably, columbium is present in an amount greater than tantalum. Tantalum can be essentially absent from the alloy, i.e., only at impurity levels.

REFERENCES:
patent: 3850624 (1974-11-01), Hulit et al.
patent: 3902862 (1975-09-01), Moll et al.
patent: RE28681 (1976-01-01), Baldwin
patent: 3976480 (1976-08-01), Watanabe
patent: 4078951 (1978-03-01), Denzine et al.
patent: 4608094 (1986-08-01), Miller et al.
patent: 5938863 (1999-08-01), Malley
patent: 0669403 (1995-08-01), None
patent: 2 148 323 (1985-05-01), None
Patent Abstracts of Japan, Jul. 22, 1986, vol. 0102, No. 08 (C-361) and JP 61 048562 A, Hitachi Ltd, Mar. 10, 1986.
J.R. Davis; “Heat-Resistant Materials”; 1997, ASM International, Ohio, USA, XP002291906; ISBN: 0-871780-5596-6; pp. 221-227; table 2.

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