Patent US5002834A successfully refreshed from Google Patents.
US5002834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant alloy
Assignee: Huntington Alloys Corp
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Filing: 1988-04-01
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Granted: 1991-03-26
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Expires: 2008-04-01
Abstract
Abstract Discloses a composite metal body having an oxide-dispersion-strengthened substrate made by mechanical alloying and a high chromium-aluminum nickel- or cobalt-base coating on the substrate. The substrate is characterized by containing an amount of aluminum effective to react with oxygen and nitrogen within the body of the substrate to prevent migration of these gases to the interface of substrate and coating and to thereby inhibit spalling of the coating.
Inventors
- 👤 Gaylord D. Smith
- 👤 Raymond C. Benn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:46
CPC Classifications
C; C23; C23C; C23C30/00; B; B32; B32B; B32B15/00; B32B15/01; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12063; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
120 words
A composite metal body consisting of a coating and an oxide dispersion strengthened powder metallurgical alloy substrate, said coating consisting essentially of 15-25% chromium, about 3 to 11% aluminum, up to 5% tantalum, yttrium up to 1% and the balance nickel and cobalt, with the alloy consisting essentially of 10 to 35% chromium, from 3 to 9% aluminum, up to 0.2% carbon, a refractory oxide in a small but effective amount of about 0.3 up to 5% to enhance strength, up to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium, up to 2% hafnium, up to 4% iron, the balance being nickel.
Claim 2
Dependent Claim
120 words
A composite metal body consisting of a coating and an oxide dispersion strengthened powder metallurgical alloy substrate, said coating consisting essentially of 15-25% chromium, about 3 to 11% aluminum, up to 5% tantalum, yttrium up to 1% and the balance nickel and cobalt, with the alloy consisting essentially of 10 to 35% chromium, from 3 to 9% aluminum, up to 0.2% carbon, a refractory oxide in a small but effective amount of about 0.3 up to 5% to enhance strength, up to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium, up to 2% hafnium, up to 4% iron, the balance being nickel.
Claim 3
Dependent Claim
17 words
The composite metal of claim 1 in which the coating contains about 6 to about 8.5% aluminum.
Claim 4
Dependent Claim
18 words
The composite metal body of claim 1 in which the substrate alloy contains about 0.1% to 1% titanium.
Claim 5
Dependent Claim
64 words
The composite metal body of claim 1 in which the substrate alloy contains 16 to 30% chromium, about 4% to 7% aluminum, about 0.3 to 2% yttria, up to 0.1% boron, up to 0.25% zirconium, up to 8% tungsten, up to 5% molybdenum, up to 2% columbium, up to 15% cobalt, up to 2% rhenium, up to 1% hafnium and up to 2% iron.
Claim 6
Dependent Claim
18 words
The composite metal body of claim 1 in which the substrate alloy contains about 5 to 7% aluminum.
Claim 7
Dependent Claim
19 words
The composite metal body of claim 4 in which the aluminum of the substrate alloy is at least 4.5%.
Claim 8
Dependent Claim
102 words
A powder metallurgical alloy characterized by good oxidation resistance at temperature as high as 2200° F., good resistance to sulfidation at high temperatures, and good tensile and stress-rupture strength at temperatures from 1300° F. to 2200° F. said alloy consisting essentially of 16 to 30% chromium, about 3 to 9% aluminum, a refractory oxide in an amount about 0.3 to 5%, about 0.1 to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium, up to 2% hafnium, up to 4% iron and the balance nickel.
Claim 9
Dependent Claim
102 words
A powder metallurgical alloy characterized by good oxidation resistance at temperature as high as 2200° F., good resistance to sulfidation at high temperatures, and good tensile and stress-rupture strength at temperatures from 1300° F. to 2200° F. said alloy consisting essentially of 16 to 30% chromium, about 3 to 9% aluminum, a refractory oxide in an amount about 0.3 to 5%, about 0.1 to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium, up to 2% hafnium, up to 4% iron and the balance nickel.
Claim 10
Dependent Claim
12 words
The alloy set forth in claim 7 containing 5 to 7% aluminum.
Claim 11
Dependent Claim
17 words
The alloy of claim 7 in sheet form and having a grain aspect ratio of about 1.
Claim 12
Dependent Claim
14 words
The alloy of claim 7 having a grain aspect ratio of at least 5.
Claim 13
Dependent Claim
14 words
The alloy of claim 7 in which titanium is present from 0.1 to 1%.
Claim 14
Dependent Claim
101 words
A composite metal body consisting of a coating and an oxide dispersion strengthened powder metallurgical alloy substrate, said coating containing at least 3% aluminum, with said alloy consisting essentially of 10 to 35% chromium, from 3 to 9% aluminum, up to 0.2% carbon, a refractory oxide in a small but effective amount of about 0.3 up to 5% to enhance strength, up to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium up to 2% hafnium, up to 4% iron, the balance fine nickel.
Claim 15
Dependent Claim
101 words
A composite metal body consisting of a coating and an oxide dispersion strengthened powder metallurgical alloy substrate, said coating containing at least 3% aluminum, with said alloy consisting essentially of 10 to 35% chromium, from 3 to 9% aluminum, up to 0.2% carbon, a refractory oxide in a small but effective amount of about 0.3 up to 5% to enhance strength, up to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium up to 2% hafnium, up to 4% iron, the balance fine nickel.
Claim 16
Dependent Claim
97 words
A wrought alloy characterized by good oxidation resistance at temperature as high as 2200° F., good resistance to sulfidation at high temperatures, and good tensile and stress-rupture strength at temperatures from 1300° F. to 2200° F. said alloy consisting essentially of 16 to 30% chromium, about 3 to 9% aluminum, yttrium about 0.3 up to 1%, about 0.1 to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium, up to 2% hafnium, up to 4% iron and the balance nickel.
Claim 17
Dependent Claim
97 words
A wrought alloy characterized by good oxidation resistance at temperature as high as 2200° F., good resistance to sulfidation at high temperatures, and good tensile and stress-rupture strength at temperatures from 1300° F. to 2200° F. said alloy consisting essentially of 16 to 30% chromium, about 3 to 9% aluminum, yttrium about 0.3 up to 1%, about 0.1 to 3% titanium, up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium, up to 2% hafnium, up to 4% iron and the balance nickel.
Claim 18
Dependent Claim
13 words
The alloy as set forth in claim 13 containing 5 to 7% aluminum.
Claim 19
Dependent Claim
14 words
The alloy of claim 13 in which titanium is present from 0.1 to 1%.
Claim 20
Dependent Claim
125 words
A composite metal body consisting of a coating and an oxide dispersion strengthened powder metallurgical alloy substrate, said coating consisting essentially of about 20 to 30% chromium, about 6 to 8.5% aluminum, about 3 to 5% tantalum, about 0.5 to 0.75% yttrium, the balance being nickel and cobalt, with the alloy consisting essentially of 10 to 35% chromium, from 3 to 9% aluminum, up to 0.2% carbon, a refractory oxide in a small but effective amount of about 0.3 up to 5% to enhance strength, up to 3% titanium up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium up to 2% hafnium, up to 4% iron, the balance being nickel.
Claim 21
Dependent Claim
125 words
A composite metal body consisting of a coating and an oxide dispersion strengthened powder metallurgical alloy substrate, said coating consisting essentially of about 20 to 30% chromium, about 6 to 8.5% aluminum, about 3 to 5% tantalum, about 0.5 to 0.75% yttrium, the balance being nickel and cobalt, with the alloy consisting essentially of 10 to 35% chromium, from 3 to 9% aluminum, up to 0.2% carbon, a refractory oxide in a small but effective amount of about 0.3 up to 5% to enhance strength, up to 3% titanium up to 10% tungsten, up to 8% molybdenum, up to 8% tantalum, up to 4% columbium, up to 20% cobalt, up to 4% rhenium up to 2% hafnium, up to 4% iron, the balance being nickel.
Claim 22
Dependent Claim
15 words
A composite metal body as in claim 16 wherein said coating contains about 23% cobalt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |