US5406825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forging die
Assignee: AGC Inc
•
Filing: 1994-04-28
•
Granted: 1995-04-18
•
Expires: 2014-04-28
Abstract
Abstract A forging die has an inner cylinder of a hard material which is composed of 8-40 vol. % of a metal phase including Ni and Mo as major components and the remaining amount of a ceramic phase including Mo2NiB2 and/or (Mo, W)2NiB2, and an outer cylinder of metal, wherein the outer periphery of the inner cylinder is in a state of interference fit to the outer cylinder.
Inventors
- 👤 Noritoshi Horie
- 👤 Kimihiko Sato
- 👤 Koichi Kanda
- 👤 Kazuhiro Mitamura
- 👤 Keiichi Hamazaki
- 👤 Takehiko Kori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:26
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/02; B21C; B21C25/00; B21C25/02; B21C25/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A forging die which comprises an inner cylinder of a hard material which is composed of 8-40 vol. % of a metal phase including as major components Ni and Mo, and the remaining amount of a ceramic phase including Mo 2 NiB 2 and/or (Mo,W) 2 NiB 2 , and an outer cylinder of metal, wherein the outer periphery of the inner cylinder is in a state of interference fit to the outer cylinder.
Claim 2
Dependent Claim
74 words
A forging die which comprises an inner cylinder of a hard material which is composed of 8-40 vol. % of a metal phase including as major components Ni and Mo, and the remaining amount of a ceramic phase including Mo 2 NiB 2 and/or (Mo,W) 2 NiB 2 , and an outer cylinder of metal, wherein the outer periphery of the inner cylinder is in a state of interference fit to the outer cylinder.
Claim 3
Dependent Claim
46 words
The forging die according to claim 1, wherein the outer cylinder is made of steel, and an interference fit tolerance between the inner cylinder and the outer cylinder at the room temperature is in a range of 0.4%-1.0% of the outer diameter of the inner cylinder.
Claim 4
Dependent Claim
32 words
The forging die according to claim 1, wherein the hard material contains at least one selected from the group consisting of Ta, Nb and Cr, at an amount of 1.0-30 wt. %.
Claim 5
Dependent Claim
32 words
The forging die according to claim 2, wherein the hard material contains at least one selected from the group consisting of Ta, Nb and Cr, at an amount of 1.0-30 wt. %.
Claim 6
Dependent Claim
18 words
The forging die according to claim 1, wherein the hard material contains 10-28 vol. % of metal phase.
Claim 7
Dependent Claim
18 words
The forging die according to claim 2, wherein the hard material contains 10-28 vol. % of metal phase.
Claim 8
Dependent Claim
18 words
The forging die according to claim 3, wherein the hard material contains 10-28 vol. % of metal phase.
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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) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |