US4082581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-base superalloy
Assignee: Old Carco LLC
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Filing: 1973-08-09
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Granted: 1978-04-04
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Expires: 1993-08-09
Abstract
Abstract New nickel-base superalloys with good overall properties, the alloys being particularly adapted for high temperature applications at about 1800 DEG F. to 2000 DEG F., such as for turbine engine or other high temperature, high stress applications, and possessing a complex, multi-component gamma prime Ni3Al1 matrix (not necessarily in the exact 3:1 proportion) in which both the nickel and aluminum atoms are partially replaced by, and/or containing, one or more of the following elements: Cr, Ti, Co, Mo and Ta. The nickel and aluminum may also be partially replaced by one or more of the following elements: W, C, Cb, Be, B, Zr and rare earths, such as for example, mischmetal. The gamma prime Ni3Al1 matrix phase precipitates a delta Ni1Al1 phase (not necessarily in the exact 1:1 proportion) at elevated temperatures (termed herein "inverse precipitation") thus providing critical high temperature strengthening of the matrix. Additionally, the alloy structure may contain a quantity of carbides, some borides and some nitrides.
Inventors
- 👤 Subrata Ghosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:00
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/056
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
An alloy having a nominal composition consisting essentially of the following constituents in about the stated weight percentages: ______________________________________
Aluminum 6.75 - 10.00
Chromium 9.00 - 11.00
Titanium 0.80 - 2.50
Cobalt 3.00 - 4.50
Molybdenum 2.50 - 4.00
Tantalum 0.95 - 4.85
Tungsten 0. - 1.25
Columbium 0. - 0.60
Carbon 0.30 - 0.50
Boron 0.03 - 0.25
Zirconium 0. - 0.80
Rare Earths 0.02 - 0.05
Beryllium 0. - 0.05
______________________________________ Nickel (including incidental impurities) the balance, and wherein the alloy is particularly characterized by a room temperature gamma prime type of matrix and by the formation of a delta NiAl type of precipitate within the matrix at elevated temperatures.
Claim 2
Dependent Claim
112 words
An alloy having a nominal composition consisting essentially of the following constituents in about the stated weight percentages: ______________________________________
Aluminum 6.75 - 10.00
Chromium 9.00 - 11.00
Titanium 0.80 - 2.50
Cobalt 3.00 - 4.50
Molybdenum 2.50 - 4.00
Tantalum 0.95 - 4.85
Tungsten 0. - 1.25
Columbium 0. - 0.60
Carbon 0.30 - 0.50
Boron 0.03 - 0.25
Zirconium 0. - 0.80
Rare Earths 0.02 - 0.05
Beryllium 0. - 0.05
______________________________________ Nickel (including incidental impurities) the balance, and wherein the alloy is particularly characterized by a room temperature gamma prime type of matrix and by the formation of a delta NiAl type of precipitate within the matrix at elevated temperatures.
Claim 3
Dependent Claim
84 words
An alloy having a nominal composition consisting essentially of the following constituents in about the stated weight percentages: ______________________________________
Aluminum 7.50
Chromium 9.50
Titanium 1.80
Cobalt 3.50
Molybdenum 3.50
Tantalum 2.00
Tungsten 0.70
Columbium 0.40
Carbon 0.50
Boron 0.50
Zirconium 0.20
Rare Earths 0.02
______________________________________ Nickel (including incidental impurities) the balance, and wherein the alloy is particularly characterized by a room temperature gamma prime type of matrix and by the formation of a delta NiAl type of precipitate within the matrix at elevated tempertures.
Claim 4
Dependent Claim
84 words
An alloy having a nominal composition consisting essentially of the following constituents in about the stated weight percentages: ______________________________________
Aluminum 7.50
Chromium 9.50
Titanium 1.80
Cobalt 3.50
Molybdenum 3.50
Tantalum 2.00
Tungsten 0.70
Columbium 0.40
Carbon 0.50
Boron 0.50
Zirconium 0.20
Rare Earths 0.02
______________________________________ Nickel (including incidental impurities) the balance, and wherein the alloy is particularly characterized by a room temperature gamma prime type of matrix and by the formation of a delta NiAl type of precipitate within the matrix at elevated tempertures.
Claim 5
Dependent Claim
106 words
An alloy having a nominal composition consisting essentially of the following constituents in about the stated weight percentages: ______________________________________
Aluminum 7.10 - 7.89
Chromium 9.45 - 9.65
Titanium 1.83 - 1.94
Cobalt 3.49 - 4.00
Molybdenum 2.95 - 3.90
Tantalum 1.97 - 2.22
Tungsten 0.49 - 0.73
Columbium 0.24 - 0.49
Carbon 0.30 - 0.60
Boron 0.05
Zirconium 0.10 - 0.20
Rare Earths 0.02 - 0.05
______________________________________ Nickel (including incidental impurities) the balance, and wherein the alloy is particularly characterized by a room temperature gamma prime type of matrix and by the formation of a delta NiAl type of precipitate within the matrix at elevated temperatures.
Claim 6
Dependent Claim
106 words
An alloy having a nominal composition consisting essentially of the following constituents in about the stated weight percentages: ______________________________________
Aluminum 7.10 - 7.89
Chromium 9.45 - 9.65
Titanium 1.83 - 1.94
Cobalt 3.49 - 4.00
Molybdenum 2.95 - 3.90
Tantalum 1.97 - 2.22
Tungsten 0.49 - 0.73
Columbium 0.24 - 0.49
Carbon 0.30 - 0.60
Boron 0.05
Zirconium 0.10 - 0.20
Rare Earths 0.02 - 0.05
______________________________________ Nickel (including incidental impurities) the balance, and wherein the alloy is particularly characterized by a room temperature gamma prime type of matrix and by the formation of a delta NiAl type of precipitate within the matrix at elevated temperatures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |