US4810467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-base alloy
Assignee: General Electric Co
•
Filing: 1987-08-06
•
Granted: 1989-03-07
•
Expires: 2007-08-06
Abstract
Abstract A high temperature-resistant nickel-base alloy adapted for use in turbine nozzle components contains carefully balanced amounts 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.
Inventors
- 👤 John H. Wood
- 👤 John S. Haydon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:26
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/055
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
156 words
A castable nickel-base alloy adapted for consistent crack-free 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, wherein the weight of said carbon and the weight of said zirconium are each limited to yield an easily castable alloy free from hot tearing and microshrinkage, wherein the weight of said titanium, the weight of said aluminum, the weight of said tantalum and the weight of said columbium are limited to yield an easily weldable ductile alloy, and wherein said titanium, said aluminum, said tantalum, and said columbium comprise gamma-prime forming elements which form a gamma-prime precipitate phase for precipitation strengthening said alloy.
Claim 2
Dependent Claim
156 words
A castable nickel-base alloy adapted for consistent crack-free 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, wherein the weight of said carbon and the weight of said zirconium are each limited to yield an easily castable alloy free from hot tearing and microshrinkage, wherein the weight of said titanium, the weight of said aluminum, the weight of said tantalum and the weight of said columbium are limited to yield an easily weldable ductile alloy, and wherein said titanium, said aluminum, said tantalum, and said columbium comprise gamma-prime forming elements which form a gamma-prime precipitate phase for precipitation strengthening said alloy.
Claim 3
Dependent Claim
23 words
The alloy of claim 1, wherein said alloy has been heat treated at 2100F. for 4 hours and at 1475F. for 8 hours.
Claim 4
Dependent Claim
14 words
The alloy of claim 1, containing about 6 atomic percent of said gamma-prime-forming elements.
Claim 5
Dependent Claim
15 words
The alloy of claim 1, containing about 28 volume percent of said gamma-prime precipitate phase.
Claim 6
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 7
Dependent Claim
134 words
A castable nickel-base alloy adapted for consistent crack-free 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, wherein the weight of said carbon and the weight of said zirconium are each limited to yield an easily castable alloy free from hot tearing and microshrinkage, wherein the weight of said titanium, the weight of said aluminum, the weight of said tantalum and the weight of said columbium are limited to yield an easily weldable ductile alloy, and wherein said titanium, said aluminum, said tantalum, and said columbium comprise gamma-prime forming elements which forms a gamma-prime precipitate phase for precipitation strengthening said alloy.
Claim 8
Dependent Claim
134 words
A castable nickel-base alloy adapted for consistent crack-free 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, wherein the weight of said carbon and the weight of said zirconium are each limited to yield an easily castable alloy free from hot tearing and microshrinkage, wherein the weight of said titanium, the weight of said aluminum, the weight of said tantalum and the weight of said columbium are limited to yield an easily weldable ductile alloy, and wherein said titanium, said aluminum, said tantalum, and said columbium comprise gamma-prime forming elements which forms a gamma-prime precipitate phase for precipitation strengthening said alloy.
Claim 9
Dependent Claim
23 words
The alloy of calim 6, wherein said alloy has been heat treated at 2100F. for 4 hours and at 1475F. for 8 hours.
Claim 10
Dependent Claim
23 words
The alloy of calim 6, wherein said alloy has been heat treated at 2100F. for 4 hours and at 1475F. for 8 hours.
Claim 11
Dependent Claim
14 words
The alloy of claim 6, containing about 6 atomic percent of said gamma-prime-forming elements.
Claim 12
Dependent Claim
15 words
The alloy of claim 6, containing about 28 volume percent of said gamma-prime precipitate phase.
Claim 13
Dependent Claim
25 words
The alloy of claim 6, wherein a ratio of the atomic percent of said aluminum to the atomic percent of said titanium is about 0.91.
Claim 14
Dependent Claim
14 words
The alloy of claim 7, containing about 6 atomic percent of said gamma-prime-forming elements.
Claim 15
Dependent Claim
15 words
The alloy of claim 7, containing about 28 volume percent of said gamma-prime precipitate phase.
Claim 16
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.
References Cited (Backward Citations)
US3390023A
Cited
US3871928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |