Patent US4443255A successfully refreshed from Google Patents.
US4443255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard facing of metal substrates
Assignee: US TUNGSTEN Corp A CORP OF
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Filing: 1981-11-09
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Granted: 1984-04-17
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Expires: 2001-11-09
Abstract
Abstract Method for hard-facing substrates is disclosed using a hard facing material consisting essentially of at least one vanadium carbide. In a particular embodiment of the invention tungsten is present in the hard facing material in solid solution with vanadium carbide.
Inventors
- 👤 Harry J. Brown
- 👤 William D. Forgeng
- 👤 Charles W. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:08
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; C; C23; C23C; C23C4/00; C23C4/04; C23C4/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
A hard facing material for deposition onto the surface of an iron or steel substrate at molten temperatures which comprises a finely divided particulate composition of chemically combined vanadium and carbon having tungsten in solid solution, said composition consisting essentially of (i) at least one vanadium carbide, (ii) tungsten in solid solution with each vanadium carbide in said composition in an amount from about 10% by weight up to about 67% by weight, and (iii) at least one material selected from the group of nickel, cobalt and iron in an amount up to about 50% by weight of said composition, the aggregate amount of all vanadium carbides in said composition being at least about 10% by weight of said composition, said composition containing not more than about 5% by weight of a material selected from the group of uncombined carbon, tungsten, tungsten carbide, vanadium and mixtures thereof.
Claim 2
Dependent Claim
147 words
A hard facing material for deposition onto the surface of an iron or steel substrate at molten temperatures which comprises a finely divided particulate composition of chemically combined vanadium and carbon having tungsten in solid solution, said composition consisting essentially of (i) at least one vanadium carbide, (ii) tungsten in solid solution with each vanadium carbide in said composition in an amount from about 10% by weight up to about 67% by weight, and (iii) at least one material selected from the group of nickel, cobalt and iron in an amount up to about 50% by weight of said composition, the aggregate amount of all vanadium carbides in said composition being at least about 10% by weight of said composition, said composition containing not more than about 5% by weight of a material selected from the group of uncombined carbon, tungsten, tungsten carbide, vanadium and mixtures thereof.
Claim 3
Dependent Claim
25 words
A hard facing material in accordance with claim 1 wherein said finely divided particulate composition is a cold pressed and sintered material in particulated form.
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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) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |