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US4388114A
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Anti-wear sintered alloy
Assignee: Toyota Motor Corp
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Filing: 1980-12-05
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Granted: 1983-06-14
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Expires: 2000-12-05
Abstract
Abstract An anti-wear sintered alloy comprising chrome 2.5-7.5 weight %, manganese 0.10-3.0 weight %, phosphorus 0.2-0.8 weight %, copper 1.0-5.0 weight %, silicon 0.5-2.0 weight %, molybdenum 0-3 weight %, and carbon 1.5-3.5 weight %, the balance being Fe and less than 2% impurities, and a process of manufacturing therefore.
Inventors
- 👤 Tetsuya Suganuma
- 👤 Yoshio Fuwa
- 👤 Shuichi Fujita
- 👤 Takahashij Yoshitaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:43
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
45 words
An anti-wear sintered alloy consisting essentially of chromium 2.5-7.5 weight %, manganese 0.10-3.0 weight %, phosphorus 0.2-0.8 weight %, copper 1.0-5.0 weight %, silicon 0.5-2.0 weight %, molybdenum 0-3 weight %, and carbon 1.5-3.5 weight %, the balance being Fe and less than 2% impurities.
Claim 2
Dependent Claim
45 words
An anti-wear sintered alloy consisting essentially of chromium 2.5-7.5 weight %, manganese 0.10-3.0 weight %, phosphorus 0.2-0.8 weight %, copper 1.0-5.0 weight %, silicon 0.5-2.0 weight %, molybdenum 0-3 weight %, and carbon 1.5-3.5 weight %, the balance being Fe and less than 2% impurities.
Claim 3
Dependent Claim
48 words
An anti-wear sintered alloy according to claim 1, wherein chromium is 4.5-6.5 weight %, manganese 0.10-1.5 weight %, phosphorus 0.35-0.65 weight %, copper 1.5-3.0 weight %, silicon 0.7%-1.5 weight %, molybdenum 0.5-1.5 weight %, and carbon 1.8-3.0 weight %, the balance being Fe and less than 2% impurities.
Claim 4
Dependent Claim
47 words
The anti-wear sintered alloy of claim 1, wherein chromium is 4.5-6.0 weight %, manganese 0.10-1.2 weight %, phosphorus 0.40-0.60 weight %, copper 1.5-2.5 weight %, silicon 0.7-1.3 weight %, molybdenum 0.7-1.3 weight %, and carbon 2.0-2.8 weight %, the balance being Fe and less than 2% impurities.
Claim 5
Dependent Claim
17 words
The alloy of claim 1, 2 or 3, wherein the apparent hardness is Hv (10 kg) 350-800.
Claim 6
Dependent Claim
17 words
The alloy of claim 1, 2 or 3, wherein the apparent hardness is Hv (10 kg) 400-600.
Claim 7
Dependent Claim
35 words
The alloy of claim 1, 2 or 3, having particles of a hardened phase of M 3 C carbide and steadite uniformly distributed in a matrix, wherein the mean size of said particles is 5-30μ.
Claim 8
Dependent Claim
14 words
The alloy of claim 6 wherein the mean size of said particles is 10-25μ.
Claim 9
Dependent Claim
36 words
The alloy of claim 1, 2 or 3, having particles of a hardened phase of M 3 C carbide and steadite uniformly distributed in a matrix, the area ratio of particles being 5-30% of the matrix.
Claim 10
Dependent Claim
36 words
The alloy of claim 1, 2 or 3, having particles of a hardened phase of M 3 C carbide and steadite uniformly distributed in a matrix, the area ratio of particles being 15-20% of the matrix.
Claim 11
Dependent Claim
15 words
Alloy of claim 1, 2 or 3, wherein the density is 7.3-7.8 g/cm 3 .
Claim 12
Dependent Claim
15 words
The alloy of claim 1, 2 or 3, wherein the density is 7.4-7.8/cm 3 .
Claim 13
Dependent Claim
102 words
A sintered alloy with less than 2% impurities prepared by a process comprising preparing an alloy powder consisting essentially of Cr 2.5-7.5 weight %, Mn 0.10-3.0 weight %, P 0.2-0.8 weight %, Cu 1.0-5.0 weight %, Si 0.5-2.0 weight %, Mo 0-3 weight % and Fe 75.2-89.7% with less than 2% impurities by an atomizing method; blending the alloy powder thus obtained with graphite powder 1.5-3.5% and a lubricant 0-1.2% to form a mixture; compacting the mixture to a density 5.8-6.4 g/cm 3 under a pressure 5-7 t/cm 2 ; sintering the compacts at 1020°-1180° C. and then cooling at 10°-100° C./min.
Claim 14
Dependent Claim
102 words
A sintered alloy with less than 2% impurities prepared by a process comprising preparing an alloy powder consisting essentially of Cr 2.5-7.5 weight %, Mn 0.10-3.0 weight %, P 0.2-0.8 weight %, Cu 1.0-5.0 weight %, Si 0.5-2.0 weight %, Mo 0-3 weight % and Fe 75.2-89.7% with less than 2% impurities by an atomizing method; blending the alloy powder thus obtained with graphite powder 1.5-3.5% and a lubricant 0-1.2% to form a mixture; compacting the mixture to a density 5.8-6.4 g/cm 3 under a pressure 5-7 t/cm 2 ; sintering the compacts at 1020°-1180° C. and then cooling at 10°-100° C./min.
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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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |