US3926568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength corrosion resistant nickel-base alloy
Assignee: Huntington Alloys Corp
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Filing: 1974-08-28
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Granted: 1975-12-16
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Expires: 1994-08-28
Abstract
Abstract Alloys containing controlled percentages of chromium, aluminum, titanium, molybdenum, tungsten, tantalum, zirconium, boron, carbon and a dispersoid such as yttria afford good stress rupture properties at intermediate temperatures, e.g., 1400*F., and at more elevated temperatures, e.g., 1900*F., together with good oxidation and/or control of nitrogen important for enhancing sulfidation resistance.
Inventors
- 👤 John Stanwood Benjamin
- 👤 Jay Ward Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:11
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; Y; Y10; Y10S; Y10S75/00; Y10S75/956
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
A MECHANICALLY ALLOYED DISPERSION STRENGTHENABLE, PRECIPIATION HARDENABLE POWDER CONSISTING ESSENTIALLY OF ABOUT 13 TO 17% CHROMIUM, ABOUT 2.5 TO 6% ALUMINUM, ABOUT 2 TO 4.25% TITANIUM, ABOUT 1.75 TO 4.5% MOLYBDENUM, ABOUT 3.75 TO 6.25% TUNGSTEN, ABOUT 0.02 TO 0.5% ZIRCONIUM, ABOUT 0.001 TO 0.025% BORON, YTTRIA IN A SMALL BUT EFFECTIVE AMOUNT TO ENHANCE HIGH TEMPERATURE STRENGTH CHARACTERISTIS, UP TO 4% TANTALUM, UP TO 0.2% CARBON AND THE BALANCE ESSENTIALLY NICKEL.
Claim 2
Dependent Claim
72 words
A MECHANICALLY ALLOYED DISPERSION STRENGTHENABLE, PRECIPIATION HARDENABLE POWDER CONSISTING ESSENTIALLY OF ABOUT 13 TO 17% CHROMIUM, ABOUT 2.5 TO 6% ALUMINUM, ABOUT 2 TO 4.25% TITANIUM, ABOUT 1.75 TO 4.5% MOLYBDENUM, ABOUT 3.75 TO 6.25% TUNGSTEN, ABOUT 0.02 TO 0.5% ZIRCONIUM, ABOUT 0.001 TO 0.025% BORON, YTTRIA IN A SMALL BUT EFFECTIVE AMOUNT TO ENHANCE HIGH TEMPERATURE STRENGTH CHARACTERISTIS, UP TO 4% TANTALUM, UP TO 0.2% CARBON AND THE BALANCE ESSENTIALLY NICKEL.
Claim 3
Dependent Claim
15 words
An alloy in accordance with claim 1 characterized by a microstructure having coarse elongated grains.
Claim 4
Dependent Claim
58 words
An alloy in accordance with claim 1 containing 13.25 to 16.25% chromium, 2.75 to 5.25% aluminum, 2 to 4.25% titanium, 1.75 to 4.25% molybdenum, about 3.75 to 6.25% tungsten, about 0.05 to 0.175% zirconium, about 0.001 to 0.022% boron, about 0.5 to 2% yttria, up to 3% tantalum, up to about 0.125% carbon and the balance essentially nickel.
Claim 5
Dependent Claim
39 words
An alloy in accordance with claim 1 containing about 13.75 to 16.25% chromium, about 3.5 to 5.25% aluminum and about 2 to 3% titanium, said alloy being characterized by a high degree of oxidation resistance at elevated temperature levels.
Claim 6
Dependent Claim
37 words
An alloy in accordance with claim 1 containing about 13.75 to 16.25% chromium, about 2.75 to about 4.6% aluminum and about 4.75 to about 6.25% tungsten, said alloy being characterized by good sulfidation resistance at elevated temperatures.
Claim 7
Dependent Claim
19 words
An alloy in accordance with claim 5 in which the sum of titanium plus tungsten is at least 7.75%.
Claim 8
Dependent Claim
16 words
An alloy in accordance with claim 6 in which the said sum is at least 8.5%.
Claim 9
Dependent Claim
58 words
An alloy in accordance with claim 1 containing about 13.75 to 16.25% chromium, about 3.5 to 5.25% aluminum, about 2.4 to about 3.25% titanium, about 1.75 to 4.25% molybdenum, about 4.75 to 6.25% tungsten, about 0.05 to 0.175% zirconium, about 0.001 to 0.022% boron, about 0.4 to 2% yttria, up to 0.125% carbon and the balance essentially nickel.
Claim 10
Dependent Claim
17 words
An alloy in accordance with claim 8 containing 0.5 to 1.5% yttria and up to 3% tantalum.
Claim 11
Dependent Claim
87 words
An alloy made up of metallic powders consisting essentially of about 13% to 17% chromium, about 2.5 to 6% aluminum, about 2 to 4.25% titanium, about 1.75 to 4.5% molybdenum, about 3.75 to 6.25% tungsten, about 0.02 to 0.5% zirconium, about 0.001 to 0.025% boron, about 0.2 to 2% yttria, up to 4% tantalum, up to 0.2% carbon, up to 10% cobalt, up to 3% columbium, up to 3% hafnium, up to 0.3% nitrogen, up to about 1% oxygen, up to 3% iron and the balance nickel.
Claim 12
Dependent Claim
87 words
An alloy made up of metallic powders consisting essentially of about 13% to 17% chromium, about 2.5 to 6% aluminum, about 2 to 4.25% titanium, about 1.75 to 4.5% molybdenum, about 3.75 to 6.25% tungsten, about 0.02 to 0.5% zirconium, about 0.001 to 0.025% boron, about 0.2 to 2% yttria, up to 4% tantalum, up to 0.2% carbon, up to 10% cobalt, up to 3% columbium, up to 3% hafnium, up to 0.3% nitrogen, up to about 1% oxygen, up to 3% iron and the balance nickel.
Claim 13
Dependent Claim
77 words
A dispersion-strengthened mechanically alloyed superalloy powder consisting essentially of nitrogen present in an amount up to 0.1% and from 13 to 17% chromium, about 2.5 to 6% aluminum, about 2 to 4.25% titanium, about 1.75 to 4.5% molybdenum, about 3.75 to 6.25% tungsten, about 0.02 to 0.5% zirconium, about 0.001 to 0.025% boron, yttria in a small but effective amount to enhance strength characteristics, up to 4% tantalum, up to 0.2% carbon and the balance essentially nickel.
Claim 14
Dependent Claim
77 words
A dispersion-strengthened mechanically alloyed superalloy powder consisting essentially of nitrogen present in an amount up to 0.1% and from 13 to 17% chromium, about 2.5 to 6% aluminum, about 2 to 4.25% titanium, about 1.75 to 4.5% molybdenum, about 3.75 to 6.25% tungsten, about 0.02 to 0.5% zirconium, about 0.001 to 0.025% boron, yttria in a small but effective amount to enhance strength characteristics, up to 4% tantalum, up to 0.2% carbon and the balance essentially nickel.
Claim 15
Dependent Claim
16 words
An alloy in accordance with claim 11 in which the nitrogen does not exceed about 0.075%.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |