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US4348232A
Expired / Lapsed
US
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Abrasion resistant ferro-based sintered alloy
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1980-05-07
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Granted: 1982-09-07
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Expires: 2000-05-07
Abstract
Abstract An abrasion resistant ferro-based sintered alloy comprising 0.8 to 1.5% by weight of carbon, 0.5 to 2.5% by weight of chromium, 2.0 to 6.0% by weight of molybdenum, 1.5 to 5.0% by weight of nickel, 0.1 to 2.0% by weight of tungsten, 0.2 to 5.0% by weight of copper and the balance iron wherein said alloy contains molybdenum particles around which nickel is distributed and which are uniformly dispersed in the base structure comprising a mixture of pearlite, bainite and martensite and said alloy contains composite carbide of Fe-Cr-W-C dispersed in the base structure, is disclosed.
Inventors
- 👤 Takeshi Hiraoka
- 👤 Shigeru Urano
- 👤 Masajiro Takeshita
- 👤 Keiji Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:22
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
An abrasion resistant ferro-based sintered alloy comprising 0.8 to 1.5% by weight of carbon, 0.5 to 2.5% by weight of chromium, 2.0 to 6.0% by weight of molybdenum, 1.5 to 5.0% by weight of nickel, 0.1 to 2.0% by weight of tungsten, 0.2 to 5.0% by weight of copper and the balance iron wherein said alloy contains molybdenum particles around which nickel is distributed and which are uniformly dispersed in the base structure comprising a mixture of pearlite, bainite and martensite and said alloy contains composite carbide of Fe-Cr-W-C dispersed in the base structure.
Claim 2
Dependent Claim
94 words
An abrasion resistant ferro-based sintered alloy comprising 0.8 to 1.5% by weight of carbon, 0.5 to 2.5% by weight of chromium, 2.0 to 6.0% by weight of molybdenum, 1.5 to 5.0% by weight of nickel, 0.1 to 2.0% by weight of tungsten, 0.2 to 5.0% by weight of copper and the balance iron wherein said alloy contains molybdenum particles around which nickel is distributed and which are uniformly dispersed in the base structure comprising a mixture of pearlite, bainite and martensite and said alloy contains composite carbide of Fe-Cr-W-C dispersed in the base structure.
Claim 3
Dependent Claim
56 words
The alloy of claim 1, wherein said alloy further comprises 0.1 to 5.0% by weight of at least one of phosphorus, boron and silicon which permits liquid-phase sintering and have 0.2 to 10% by volume of sintering pores at least 40% of which consist of pores having a pore size of not larger than 150 μm.
References Cited (Backward Citations)
US3698877A
Cited
US4243414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |