Patent US3918924A successfully refreshed from Google Patents.
US3918924A
Expired / Lapsed
US
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Method for producing wear-resistant ferrous sintered metal containing high amounts of titanium carbide grains and carbon particles
Assignee: Chugai Electric Industrial Co Ltd
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Filing: 1973-09-18
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Granted: 1975-11-11
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Expires: 1993-09-18
Abstract
Abstract A sintered graphite-containing ferrous-titanium carbide composition is provided which is produced by a liquid phase sintering process, wherein a powder composition comprising a mixture of iron, titanium (e.g. ferro-titanium), cast iron and carbon is pressed into a compact and the compact then heated to above the melting point of the cast iron such that the carbon in the melt reacts with the titanium to form titanium carbide, the amount of carbon being also sufficient to form graphite, such that on cooling, a metallographic structure is obtained comprised of fine grains of precipitated titanium carbide dispersed in a ferrous matrix which also contains precipitated particles of graphite.
Inventors
- 👤 Akira Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:37
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
A FERROUS-TITANIUM CARBIDE COMPOSITION CHARACTERIZED BY RESISTANCE TO SCUFFING AND WEAR COMPRISING METALLOGRAPHICALLY A FERROUS MATRIX IN WHICH SUBSTANTIALLY ALL OF THE CONTAINED TITANIUM CARBIDE IS IN THE FORM OF FINE PRECIPITATED GRAINS SUSBSTANTIALLY BELOW 5 MICRONS IN SIZE, SAID MATRIX CONTAINING PARTICLE OF PRECIPITATED GRAPHITE UNFORMLY DISPERSED THERETHROUGH AT SUBSTANTIALLY LESS THAN 10 MICRONS IN SIZE.
Claim 2
Dependent Claim
57 words
A FERROUS-TITANIUM CARBIDE COMPOSITION CHARACTERIZED BY RESISTANCE TO SCUFFING AND WEAR COMPRISING METALLOGRAPHICALLY A FERROUS MATRIX IN WHICH SUBSTANTIALLY ALL OF THE CONTAINED TITANIUM CARBIDE IS IN THE FORM OF FINE PRECIPITATED GRAINS SUSBSTANTIALLY BELOW 5 MICRONS IN SIZE, SAID MATRIX CONTAINING PARTICLE OF PRECIPITATED GRAPHITE UNFORMLY DISPERSED THERETHROUGH AT SUBSTANTIALLY LESS THAN 10 MICRONS IN SIZE.
Claim 3
Dependent Claim
45 words
The ferrous-titanium carbide composition of claim 1, wherein the amount of precipitated titanium carbide ranges by weight from about 15% to 50% and the graphite from about 1% to 4.5%, and wherein the precipitated titanium carbide grains have an average size of approximately 1 micron.
Claim 4
Dependent Claim
22 words
The ferrous-titanium carbide composition of claim 2, wherein the amount of precipitated titanium carbide ranges by weight from about 20% to 40%.
Claim 5
Dependent Claim
67 words
AS AN ARTICLE OF MANUFACTURE, A SCUFF AND WEAR-RESISTANT ELEMENT FORMED OF A SINTERED FERROUS-TITANIUM CARBIDE COMPOSITION, SAID ELEMENT BEING CHARACTERIZED METALLOGRAPHICALLY BY A FERROUS MATRIX IN WHICH SUBSTANTIALLY ALL OF THE CONTAINED TITANIUM CARBIDE IS IN THE FORM OF FINE PRECIPITATED GRAINS SUBSTANTIALLY BELOW 5 MICRONS IN SIZE, SAID MATRIX CONTAINING PARTICLES OF PRECIPITATED GRAPHITE UNIFORMLY DISPERSED THERETHROUGH AT SUBSTANTIALLY LESS THAN 10 MICRONS IN SIZE.
Claim 6
Dependent Claim
67 words
AS AN ARTICLE OF MANUFACTURE, A SCUFF AND WEAR-RESISTANT ELEMENT FORMED OF A SINTERED FERROUS-TITANIUM CARBIDE COMPOSITION, SAID ELEMENT BEING CHARACTERIZED METALLOGRAPHICALLY BY A FERROUS MATRIX IN WHICH SUBSTANTIALLY ALL OF THE CONTAINED TITANIUM CARBIDE IS IN THE FORM OF FINE PRECIPITATED GRAINS SUBSTANTIALLY BELOW 5 MICRONS IN SIZE, SAID MATRIX CONTAINING PARTICLES OF PRECIPITATED GRAPHITE UNIFORMLY DISPERSED THERETHROUGH AT SUBSTANTIALLY LESS THAN 10 MICRONS IN SIZE.
Claim 7
Dependent Claim
47 words
The article of manufacture of claim 4, wherein the composition of said element comprises by weight 15% to 50% of said precipitated titanium carbide grains and about 1% to 4.5% of graphite, and wherein the precipitated titanium carbide grains have an average size of approximately 1 micron.
Claim 8
Dependent Claim
22 words
The article of manufacture of claim 5, wherein the amount of precipitated titanium carbide ranges from about 20% to 40% by weight.
References Cited (Backward Citations)
US3720504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |