US4422875A
Expired / Lapsed
US
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Ferro-sintered alloys
Assignee: Resonac Corp
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Filing: 1981-02-25
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Granted: 1983-12-27
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Expires: 2001-02-25
Abstract
Abstract A ferro-sintered alloy having wear-resistance at elevated temperatures, comprises a perlite matrix having a copper content of from 0.2 to 1.5% by weight. 10 to 50% by weight of a phase A rich in heat and corrosion resistance is dispersed in the matrix with phase A including 9 to 20% Cr, 6 to 15% Ni, 1.5 to 9.5% Mo, 1.5 to 9.5% W, 0.7 to 4.5 Cu and an Fe remainder. In addition, 2 to 15% by weight of an additional component is dispersed in the matrix which is selected from one of a group of components which are wear-resistant. The group of components comprises: 50˜70% Mo-Fe Alloy (by weight) 50˜70% Cr-Fe Alloy (by weight) 45˜60% Fe-33˜36% Mo-Si Alloy (by weight) 45˜60% Co-33˜36% Mo-Si Alloy (by weight).
Inventors
- 👤 Tohru Nakata
- 👤 Hiroyuki Endo
- 👤 Masatoshi Harada
- 👤 Tadao Hayasaka
- 👤 Osamu Miyamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0207; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49306; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12174
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A ferro-sintered alloy having wear resistance at elevated temperatures, comprising a perlite matrix having a copper content of 0.2 to 1.5 weight %, in which are dispersed 10 to 50 weight % of a phase A rich in heat- and corrosion-resistance and having the following composition and 2 to 15 weight % of at least one selected from the group consisting of four phases B rich in wear resistance and having the following composition: ______________________________________
Cr 9˜ 20% (by weight)
Ni 6˜ 15% (by weight)
Mo 1.5˜ 9.5% (by weight)
Phase A W 1.5˜ 9.5% (by weight)
Cu 0.7˜ 4.5% (by weight)
Fe the remainder
50˜ 70% Mo--Fe Alloy (by weight)
50˜ 70% Cr--Fe Alloy (by weight)
Phase B 45˜ 60% Fe--33˜ 36% Mo--Si Alloy (by weight)
45˜ 60% Co--33˜ 36% Mo--Si Alloy (by
______________________________________
weight)
Claim 2
Dependent Claim
136 words
A ferro-sintered alloy having wear resistance at elevated temperatures, comprising a perlite matrix having a copper content of 0.2 to 1.5 weight %, in which are dispersed 10 to 50 weight % of a phase A rich in heat- and corrosion-resistance and having the following composition and 2 to 15 weight % of at least one selected from the group consisting of four phases B rich in wear resistance and having the following composition: ______________________________________
Cr 9˜ 20% (by weight)
Ni 6˜ 15% (by weight)
Mo 1.5˜ 9.5% (by weight)
Phase A W 1.5˜ 9.5% (by weight)
Cu 0.7˜ 4.5% (by weight)
Fe the remainder
50˜ 70% Mo--Fe Alloy (by weight)
50˜ 70% Cr--Fe Alloy (by weight)
Phase B 45˜ 60% Fe--33˜ 36% Mo--Si Alloy (by weight)
45˜ 60% Co--33˜ 36% Mo--Si Alloy (by
______________________________________
weight)
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |