Patent US4417689A successfully refreshed from Google Patents.
Patent US3850702A successfully refreshed from Google Patents.
US3850702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making superalloy bodies
Assignee: General Electric Co
•
Filing: 1973-10-01
•
Granted: 1974-11-26
•
Expires: 1993-10-01
Abstract
Abstract A method of making superalloy bodies characterized by having aligned elongated grains is provided by employing powder metallurgy procedures. The method involves hot compacting a nickel-base superalloy to a dense solid, heat treating the solid to form an essentially single phase gamma structure, imparting a critical strain to the single phase material and then subjecting the material to a unidirectional recrystallization step to form an elongated columnar grained structure having grain boundaries substantially parallel to the direction of recrystallization.
Inventors
- 👤 E Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:42
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/40; H10D62/405; B; B22; B22F; B22F3/00; B22F3/24; H10D99/00; H10P; H10P14/00; H10P14/20; H10P14/29; H10P14/2901; H10P14/2902; H10P14/2905; H10P14/2926; H10P14/34; H10P14/3402; H10P14/3404; H10P14/3411; H10P95/00; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/902; Y10S148/00; Y10S148/049; Y10S148/097; Y10S148/115; Y10S148/118; Y10S438/00; Y10S438/973
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
A METHOD OF MAKING NICKEL-BASE SUPERALLOY POWDER TO FORM ACTERIZED BY AN ALIGNED ELONGATED GRAIN OR AMONOCRYSTALLINE STRUCTURE COMPRISING THE STEPS OF: A. HOT COMPACTING A NICKEL-BASE SUPERALLOY POWDER TO FORM A RELATIVELY DENSE SOLID CONSISTING ESSENTIALLY OF A y'' PRECIPITATE PHASE WITHIN A Y MATRIX, B. SOLUTION HEAT TREATING THE DENSE SOLID AT A TEMPERATURE BELOW THE INCIPIENT MELTING POINT AND HIGH ENOUGH TO DISSOLVE A SUBSTANTIAL PORTION OF THE Y'' PHASE, C. SUBJECTING THE MATERIAL TO A SUFFICIENT STRAIN BELOW THE RECYSTALLIZATION TEMPERATUE TO PERMIT SUBSEQUENT RECRYSTALLIZATION, AND DE. UNIDIRECTIONALLY RECYCSTALLIZING THE STRAINED MATERIAL IN A TEMPERATURE ARADIENT BEELOW THE INCIPIENT MELTING TEMPERATURE AND ABOVE THE Y'' SOLVUS TEMPERATURE TO FORM A BODY HAVING AN ALIGNED ELONGATED GRAIN OR MONOCRYSTALLINE STRUCTURE.
Claim 2
Independent Claim
123 words
A METHOD OF MAKING NICKEL-BASE SUPERALLOY POWDER TO FORM ACTERIZED BY AN ALIGNED ELONGATED GRAIN OR AMONOCRYSTALLINE STRUCTURE COMPRISING THE STEPS OF: A. HOT COMPACTING A NICKEL-BASE SUPERALLOY POWDER TO FORM A RELATIVELY DENSE SOLID CONSISTING ESSENTIALLY OF A y'' PRECIPITATE PHASE WITHIN A Y MATRIX, B. SOLUTION HEAT TREATING THE DENSE SOLID AT A TEMPERATURE BELOW THE INCIPIENT MELTING POINT AND HIGH ENOUGH TO DISSOLVE A SUBSTANTIAL PORTION OF THE Y'' PHASE, C. SUBJECTING THE MATERIAL TO A SUFFICIENT STRAIN BELOW THE RECYSTALLIZATION TEMPERATUE TO PERMIT SUBSEQUENT RECRYSTALLIZATION, AND DE. UNIDIRECTIONALLY RECYCSTALLIZING THE STRAINED MATERIAL IN A TEMPERATURE ARADIENT BEELOW THE INCIPIENT MELTING TEMPERATURE AND ABOVE THE Y'' SOLVUS TEMPERATURE TO FORM A BODY HAVING AN ALIGNED ELONGATED GRAIN OR MONOCRYSTALLINE STRUCTURE.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein the strain is equivalent to an elongation at room temperature of about 1-3 percent.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein the strain is equivalent to an elongation at a temperature of 1200*-1400* F. of 8-10 percent.
Claim 5
Dependent Claim
30 words
The method of claim 1, wherein the nickel-base superalloy powder is compacted by canning in a steel jacket under vacuum to form a billet and the billet is hot extruded.
Claim 6
Dependent Claim
24 words
The method of claim 1, wherein said nickel-base superalloy powder is dispersed with up to 10 percent by volume of a chemically inert phase.
Claim 7
Dependent Claim
12 words
The method of claim 5, wherein said chemically inert phase is alumina.
Claim 8
Dependent Claim
15 words
The method of claim 1, wherein said alloy consists essentially in weight percent of about:
Claim 9
Dependent Claim
45 words
The method of claim 1, wherein the strained material is unidirectionally recrystallized by drawing the material through a gradient furnace having a temperature gradient of at least 1000* F. per inch and the material is drawn at a rate of about 0.5-2 inches per hour.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |