Patent US3874938A successfully refreshed from Google Patents.
US3874938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot working of dispersion-strengthened heat resistant alloys and the product thereof
Assignee: Huntington Alloys Corp
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Filing: 1973-05-21
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Granted: 1975-04-01
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Expires: 1993-05-21
Abstract
Abstract A method is provided for producing a hot worked dispersionstrengthened heat resistant alloy composition characterized by a metallographic structure consisting essentially of large coarse grains having a preferred orientation relative to a major axis of working, the method comprising providing a confined batch of cold worked mechanically alloyed composite particles comprised of alloying constituents which when alloyed together provide a dispersion-strengthened alloy, which is preferably also age hardenable, and then hot working (e.g., extruding) said batch under correlated conditions of temperature, reduction ratio and strain rate such that when the resulting hot worked product is subsequently heated to an elevated germinative grain growth temperature, coarse grains are formed disposed in one or more working directions of the alloy.
Inventors
- 👤 John Stanwood Benjamin
- 👤 Robert Lacock Cairns
- 👤 John Herbert Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:53
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249923
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A HOT WORKED, AGE HARDENABLE, DISPERSION-STRENGTHENED SUPERALLOY SHAPE HAVING A COMPOSITION RANGING FROM ABOUT 5% TO 60% CHROMIUM, ABOUT 0.5% TO 6.5% ALUMINUM, ABOUT 0.5% TO 6.5% TITANIUM, UP TO ABOUT 15% MOLYBDENUM, UP TO ABOUT 20% TUNGSTEN, UP TO ABOUT 10% COLUMBIUM, UP TO ABOUT 10% TANTALUM, UP TO ABOUT 3% VANADIUM, UP TO ABOUT 2% MANGANESE, UP TO ABOUT 2% SILICON, UP TO ABOUT 0.75% CARBON, UP TO ABOUT 0.1% BORON, UP TO ABOUT 1% ZIRCONIUM, UP TO ABOUT 0.2% MAGNESIUM, UP TO ABOUT 6% HAFNIUM, UP TO ABOUT 35% IRON, UP TO ABOUT 10% BY VOLUME OF A REFRACTORY DISPERSOID, AND THE BALANCE ESSENTIALLY NICKEL IN AN AMOUNT AT LEAST ABOUT 40% OF THE TOTAL COMPOSITION, SAID SUPERALLOY BEING CHARACTERIZED METALLOGRAPHICALLY BY COARSE ELONGATED GRAINS ORIENTED IN THE DIRECTION OF WORKING OF THE SHAPE, THE ELONGATED GRAINS BEING FURTHER CHARACTERIZED BY AN ASPECT RATIO OF AT LEAST ABOUT 3 TO 1.
Claim 2
Dependent Claim
154 words
A HOT WORKED, AGE HARDENABLE, DISPERSION-STRENGTHENED SUPERALLOY SHAPE HAVING A COMPOSITION RANGING FROM ABOUT 5% TO 60% CHROMIUM, ABOUT 0.5% TO 6.5% ALUMINUM, ABOUT 0.5% TO 6.5% TITANIUM, UP TO ABOUT 15% MOLYBDENUM, UP TO ABOUT 20% TUNGSTEN, UP TO ABOUT 10% COLUMBIUM, UP TO ABOUT 10% TANTALUM, UP TO ABOUT 3% VANADIUM, UP TO ABOUT 2% MANGANESE, UP TO ABOUT 2% SILICON, UP TO ABOUT 0.75% CARBON, UP TO ABOUT 0.1% BORON, UP TO ABOUT 1% ZIRCONIUM, UP TO ABOUT 0.2% MAGNESIUM, UP TO ABOUT 6% HAFNIUM, UP TO ABOUT 35% IRON, UP TO ABOUT 10% BY VOLUME OF A REFRACTORY DISPERSOID, AND THE BALANCE ESSENTIALLY NICKEL IN AN AMOUNT AT LEAST ABOUT 40% OF THE TOTAL COMPOSITION, SAID SUPERALLOY BEING CHARACTERIZED METALLOGRAPHICALLY BY COARSE ELONGATED GRAINS ORIENTED IN THE DIRECTION OF WORKING OF THE SHAPE, THE ELONGATED GRAINS BEING FURTHER CHARACTERIZED BY AN ASPECT RATIO OF AT LEAST ABOUT 3 TO 1.
Claim 3
Dependent Claim
119 words
The hot worked, age hardenable dispersion-strengthened superalloy shape as in claim 1 in the form of an extrusion, wherein the composition ranges from about 15% to 35% chromium; about 0.5% to 2.5% aluminum; about 1% to 5% titanium; up to about 5% molybdenum; up to about 5% tungsten; up to about 2% columbium; up to about 4% tantalum; up to about 1% vanadium; up to about 2% manganese; up to about 1% silicon; up to about 0.2% carbon; up to about 0.1% boron; up to about 0.5% zirconium; 0.2to % magnesium; up to 2% hafnium; up to about 10% iron; about 0.5 volume percent to 5 volume percent of a dispersoid; the balance essentially at least about 40% nickel.
Claim 4
Dependent Claim
46 words
The hot worked, age hardenable, dispersionstrengthened superalloy shape as in claim 2, wherein the composition comprises about 19% chromium, about 2.4% titanium, about 1.2% aluminum, about 0.07% zirconium, about 0.007% boron, about 0.05% carbon, about 2.25% by volume of a dispersoid and the balance essentially nickel.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |