US4110131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for powder-metallurgic production of a workpiece from a high temperature alloy
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1976-10-15
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Granted: 1978-08-29
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Expires: 1996-10-15
Abstract
Abstract A method for powder metallurgical production of a high temperature alloy body consists of mixing powdered alloy components or pre-alloys in the desired proportions; cold working the mix under a protective atmosphere; canning the cold-worked powder mixture; compressing the canned powder by extrusion or hot isostatic pressing to a form of dense blank; cutting said blank into slices; forging them at a constant temperature within the range of from 0.6 to 0.75 of the melting point at a strain rate of from 10 -3 to 10 0 S -1 ; and thereafter subjecting the forged body to a coarse-grain annealing between 1230° and 1300° C for up to 3 hours.
Inventors
- 👤 Gernot Gessinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:29
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/16; B22F3/24; C; C22; C22C; C22C1/00; C22C1/04; C22C1/0433; B22F2998/00; B22F2998/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49798
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
A method for powder metallurgical production of a high temperature alloy body which consists of mixing powdered alloy components or pre-alloys in the desired proportions; cold working the mix under a protective atmosphere; canning the cold-worked powder mixture; compressing the canned powder by extrusion or hot isostatic pressing to form a dense blank; cutting said blank into slices; forging them at a constant temperature within the range of from 700-800° C. at a strain rate of from 10 -3 to 10 -2 S -1 ; and thereafter subjecting the forged body to a coarse-grain annealing between 1230° and 1300° C. for up to 3 hours.
Claim 2
Independent Claim
105 words
A method for powder metallurgical production of a high temperature alloy body which consists of mixing powdered alloy components or pre-alloys in the desired proportions; cold working the mix under a protective atmosphere; canning the cold-worked powder mixture; compressing the canned powder by extrusion or hot isostatic pressing to form a dense blank; cutting said blank into slices; forging them at a constant temperature within the range of from 700-800° C. at a strain rate of from 10 -3 to 10 -2 S -1 ; and thereafter subjecting the forged body to a coarse-grain annealing between 1230° and 1300° C. for up to 3 hours.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the compression of the canned powder mixture is effected by extrusion between 1050° C. and 1150° C.
Claim 4
Dependent Claim
32 words
The method of claim 1, wherein the compression of the canned powder mixture is effected by hot isostatic pressing at a temperature above 900° C. and at a pressure of 3000 bars.
Claim 5
Dependent Claim
15 words
The method of claim 1, wherein the blank is forged from a hightemperature oxide-dispersion-hardened alloy.
Claim 6
Dependent Claim
42 words
The method of claim 4, wherein a blank having the the composition: 8.5% Co, 16.0% Cr, 1.75% Mo, 2-.60% W, 1.75% Ta, 0.09% Nb, 3.40% Al, 3.40% Ti, 0.01% B, 0.01% Zr, 60.0% Ni, and 1.5% Y 2 O 3 is forged.
Claim 7
Dependent Claim
15 words
The method of claim 1, wherein the blank is forged from a high-temperature oxide-dispersion-free alloy.
Claim 8
Dependent Claim
38 words
The method of claim 6, wherein a blank having the composition 8.5% Co, 16.0% Cr, 1.75% Mo, 2.60% W, 1.75% Ta, 0.09% Nb, 3.40% Al, 3.40% Ti, 0.01% B, 0.10% Zr, 60.0% Ni and 0.17% C is forged.
Claim 9
Dependent Claim
26 words
The method of claim 6, wherein a blank having the composition 19.0% Cr, 1.2% Al, 2.4% Ti, 0.07% Zr, 0.07% B and 77.0% Ni is forged.
Claim 10
Dependent Claim
32 words
The method of claim 6, wherein a blank having the composition 15.0% Co, 10.0% Cr, 5.5% Al, 4.7% Ti, 3.0% Mo, 0.02% C, 0.15% B, 0.06% Zr and 61.5% Ni is forged.
References Cited (Backward Citations)
US3420716A
Cited
US3776704A
Cited
US3823463A
Cited
US3865575A
Cited
US3976482A
Cited
US3975219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |