Patent EP0302302A1 successfully refreshed from Google Patents.
EP0302302A1
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EP
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Nickel-base alloy
Assignee: General Electric Co
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Filing: 1988-07-20
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Granted: —
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Expires: 2008-07-20
Abstract
Abstract A high temperature-resistant nickel-base alloy adapted for use in turbine nozzle components contains carefully balanced amount of aluminum and titanium to render the alloy repair weldable. The levels of carbon and zirconium are also carefully controlled to improve the castability of the alloy so that large turbine components may be cast without hot tearing or microshrinkage. The alloy consists essentially of, by weight percent, about 0.08% to 0.12% carbon, 0.005% to 0.02% zirconium, 0.005% to 0.015% boron, 0.9% to 1.1% tantalum, 0.7% to 0.9% columbium, 2.2% to 2.4% titanium, 1.1% to 1.3% aluminium, the sum of aluminium plus titanium being about 3.2% to 3.8%, 1.8% to 2.2% tungsten, 22.2% to 22.8% chromium, 18.5% to 19.5% cobalt, with the remainder essentially nickel.
Inventors
- 👤 John Hebert Wood
- 👤 John Stuart Haydon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 04:24
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/055
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
A nickel-base alloy adapted for welding, consisting essentially of, by weight percent, about 0.08% to 0.12% carbon, 0.005% to 0.02% zirconium, 0.005% to 0.015% boron, 0.9% to 1.1% tantalum, 0.7% to 0.9% columbium, 2.2% to 2.4% titanium, 1.1% to 1.3% aluminum, the sum of aluminum plus titanium being about 3.2% to 3.8%, 1.8% to 2.2% tungsten, 22.2% to 22.8% chromium, 18.5% to 19.5% cobalt, with the remainder essentially nickel.
Claim 2
Dependent Claim
69 words
A nickel-base alloy adapted for welding, consisting essentially of, by weight percent, about 0.08% to 0.12% carbon, 0.005% to 0.02% zirconium, 0.005% to 0.015% boron, 0.9% to 1.1% tantalum, 0.7% to 0.9% columbium, 2.2% to 2.4% titanium, 1.1% to 1.3% aluminum, the sum of aluminum plus titanium being about 3.2% to 3.8%, 1.8% to 2.2% tungsten, 22.2% to 22.8% chromium, 18.5% to 19.5% cobalt, with the remainder essentially nickel.
Claim 3
Dependent Claim
22 words
The alloy of claim 1, wherein said alloy is heat treated at 2100F for 4 hours and at 1475F for 8 hours.
Claim 4
Dependent Claim
12 words
The alloy of claim 1, containing about 6 atomic percent gamma-prime-forming elements.
Claim 5
Dependent Claim
17 words
The alloy of claim 1, wherein said gamma-prime-forming elements consist essentially of aluminum, titanium, tantalum and columbium.
Claim 6
Dependent Claim
15 words
The alloy of claim 1, containing about 28 volume percent of a gamma-prime precipitate phase.
Claim 7
Dependent Claim
25 words
The alloy of claim 1, wherein a ratio of the atomic percent of said aluminum to the atomic percent of said titanium is about 0.91%.
Claim 8
Dependent Claim
47 words
A nickel-base alloy adapted for welding, consisting essentially of, by weight percent, about 0.1% carbon, 0.01% zirconium, 0.01% boron, 1.0% tantalum, 0.8% columbium, 2.3% titanium, 1.2% aluminum, the sum of aluminum plus titanium being about 3.5%, 2.0% tungsten, 22.5% chromium, 19% cobalt, with the remainder essentially nickel.
Claim 9
Dependent Claim
47 words
A nickel-base alloy adapted for welding, consisting essentially of, by weight percent, about 0.1% carbon, 0.01% zirconium, 0.01% boron, 1.0% tantalum, 0.8% columbium, 2.3% titanium, 1.2% aluminum, the sum of aluminum plus titanium being about 3.5%, 2.0% tungsten, 22.5% chromium, 19% cobalt, with the remainder essentially nickel.
Claim 10
Dependent Claim
22 words
The alloy of claim 7, wherein said alloy is heat treated at 2100F for 4 hours and at 1475F for 8 hours.
Claim 11
Dependent Claim
12 words
The alloy of claim 7, containing about 6 atomic percent gamma-prime-forming elements.
Claim 12
Dependent Claim
17 words
The alloy of claim 7, wherein said gamma-prime-forming elements consist essentially of aluminum, titanium, tantalum and columbium.
Claim 13
Dependent Claim
15 words
The alloy of claim 7, containing about 28 volume percent of a gamma-prime precipitate phase.
Claim 14
Dependent Claim
25 words
The alloy of claim 7, wherein a ratio of the atomic percent of said aluminum to the atomic percent of said titanium is about 0.91.
Claim 15
Dependent Claim
12 words
The alloy of claim 8, containing about 6 atomic percent gamma-prime-forming elements.
Claim 16
Dependent Claim
17 words
The alloy of claim 8, wherein said gamma-prime-forming elements consist essentially of aluminum, titanium, tantalum and columbium.
Claim 17
Dependent Claim
15 words
The alloy of claim 8, containing about 28 volume percent of a gamma-prime precipitate phase.
Claim 18
Dependent Claim
25 words
The alloy of claim 8, wherein a ratio of the atomic percent of said aluminum to the atomic percent of said titanium is about 0.91.
References Cited (Backward Citations)
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