US4710345A
Expired / Lapsed
US
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Manufacturing method of super-heat-resisting alloy material
Assignee: JAPAN AS REPRESENTED BY DIRECTOR-GENERAL AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGY A CORP OF JAPAN
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Filing: 1985-10-26
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Granted: 1987-12-01
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Expires: 2005-10-26
Abstract
Abstract A manufacturing method of super-heat-resisting alloy material characterized in comprising the steps of: (1) filling and sealing the powder of Ni-based super-heat-resisting alloy in a rubber mold; (2) subjecting the powder in the rubber mold to cold isostatic pressing; (3) sintering the compact in vacuum or in gas atmosphere at a temperature of 1000° C. or more so that the sintered density increases to 95% or more than the theoretical density; and (4) next, subjecting the sintered compact to hot isostatic pressing.
Inventors
- 👤 Yoshihiko Doi
- 👤 Nobuhito Kuroishi
- 👤 Shigeki Ochi
- 👤 Noboru Uenishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:10
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A method of manufacturing a super-heat-resisting alloy material comprising the steps: cold working a powder of Ni-based super-heat-resisting alloy; filling and sealing the powder in a rubber mold; isostatically cold pressing the powder in the rubber mold into compacted powder; sintering the compacted powder in a vacuum or in a gas atmosphere at a temperature of 1000° C. or more so that the density of the resulting sintered compact material increase up to 95% or more of the theoretical density; and isostatically hot pressing the sintered compact material.
Claim 2
Independent Claim
88 words
A method of manufacturing a super-heat-resisting alloy material comprising the steps: cold working a powder of Ni-based super-heat-resisting alloy; filling and sealing the powder in a rubber mold; isostatically cold pressing the powder in the rubber mold into compacted powder; sintering the compacted powder in a vacuum or in a gas atmosphere at a temperature of 1000° C. or more so that the density of the resulting sintered compact material increase up to 95% or more of the theoretical density; and isostatically hot pressing the sintered compact material.
Claim 3
Dependent Claim
21 words
The method according to claim 1 wherein said cold pressing occurs at a compacting pressure of 4000 kgf/cm 2 or more.
Claim 4
Dependent Claim
19 words
The method according to claim 1 wherein said cold working of said powder is processed with a dry attritor.
Claim 5
Dependent Claim
33 words
The method according to claim 1 wherein said hot pressing occurs at a temperature between 1100° and 1200° C. at a pressure of 1000 kgf/cm 2 or more for thirty minutes or more.
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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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |