US4080205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered alloy having wear-resistance at high temperature
Assignee: Toyota Motor Corp
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Filing: 1976-04-28
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Granted: 1978-03-21
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Expires: 1996-04-28
Abstract
Abstract A sintered alloy having improved wear resistance at high temperatures, comprising a soft, predominantly iron matrix having a Vickers hardness of 100-200 containing more than 5 but at most 20% Mo, together with 0.5-1.5% carbon and at least one additive selected from the group consisting of nickel, cobalt and chromium, with said additive constituting at most 25% by weight of said alloy, and most of said molybdenum being contained in Mo-Fe particles having a Vickers hardness of 600-1300 which are uniformly distributed within said matrix and have an average diameter of 20-70 microns.
Inventors
- 👤 Itaru Niimi
- 👤 Kametaro Hashimoto
- 👤 Kenji Ushitani
- 👤 Youichi Serino
- 👤 Tetsuya Suganuma
- 👤 Seishu Mitani
- 👤 Kunizo Imanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:58
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A sintered alloy having improved wear resistance at high temperatures, comprising a soft, predominantly iron matrix having a Vickers hardness of 100-200 containing more than 5% but at most 20%, Mo, together with 0.5-1.5% carbon, most of said molybdenum being contained in Mo-Fe particles having a Vickers hardness of 600-1300 which are uniformly distributed within said matrix and have an average diameter of 20-70 microns.
Claim 2
Dependent Claim
65 words
A sintered alloy having improved wear resistance at high temperatures, comprising a soft, predominantly iron matrix having a Vickers hardness of 100-200 containing more than 5% but at most 20%, Mo, together with 0.5-1.5% carbon, most of said molybdenum being contained in Mo-Fe particles having a Vickers hardness of 600-1300 which are uniformly distributed within said matrix and have an average diameter of 20-70 microns.
Claim 3
Dependent Claim
93 words
A sintered alloy having improved wear resistance at high temperatures, comprising a soft, predominantly iron matrix having a Vickers hardness of 100-200 containing more than 5% but at most 20% Mo, together with 0.5-1.5% carbon, and at least one additive selected from the group consisting of nickel, cobalt and chromium, with said additive constituting at most 25% by weight of said alloy, and most of said molybdenum being contained in Mo-Fe particles having a Vickers hardness of 600-1300 which are uniformly distributed within said matrix and have an average diameter of 20-70 microns.
Claim 4
Dependent Claim
93 words
A sintered alloy having improved wear resistance at high temperatures, comprising a soft, predominantly iron matrix having a Vickers hardness of 100-200 containing more than 5% but at most 20% Mo, together with 0.5-1.5% carbon, and at least one additive selected from the group consisting of nickel, cobalt and chromium, with said additive constituting at most 25% by weight of said alloy, and most of said molybdenum being contained in Mo-Fe particles having a Vickers hardness of 600-1300 which are uniformly distributed within said matrix and have an average diameter of 20-70 microns.
Claim 5
Dependent Claim
34 words
Alloy as claimed in claim 1 which has been sintered at about 1150° C for about 1 hour, and then cooled to 600° C at the rate of at least 12° C per minute.
Claim 6
Dependent Claim
34 words
Alloy as claimed in claim 2 which has been sintered at about 1200° C for about 90 minutes, and then cooled to 600° C at the rate of at least 12° C per minute.
Claim 7
Dependent Claim
13 words
Alloy as claimed in claim 1 in which said particles contain 20-60% iron.
Claim 8
Dependent Claim
20 words
A sintered alloy as claimed in claim 2 comprising 1-15% Ni and 5-24% Co, but less than 25% of both.
Claim 9
Dependent Claim
22 words
A sintered alloy as claimed in claim 2 comprising 1-12% Ni and 3-24% Cr by weight, but less than 25% of both.
Claim 10
Dependent Claim
23 words
A sintered alloy as claimed in claim 2 comprising 1-15% Ni, 5-21% Co and 3-19% Cr but less than 25% of all three.
References Cited (Backward Citations)
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US3698055A
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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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |