Patent US4155759A successfully refreshed from Google Patents.
US4155759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard facing of metal substrates
Assignee: US TUNGSTEN Corp A CORP OF
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Filing: 1978-08-21
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Granted: 1979-05-22
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Expires: 1998-08-21
Abstract
Abstract Method for hard-facing substrates is disclosed using a hard facing material consisting essentially of combined vanadium and carbon and minor amount of uncombined carbon with up to 15% by weight cobalt.
Inventors
- 👤 Harry J. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:18
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; C22; C22C; C22C29/00; C22C29/02; C22C29/06; B23K35/36; B23K35/368; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
In a method for hard facing a surface of an iron base alloy substrate by forming a metallurgical bond between a said surface and hard-facing material by heating said surface to its melting point and depositing hard-facing material thereon, the improvement which comprises employing as hard-facing material a composition which consists essentially of chemically combined vanadium and carbon as VC 0 .89 and free carbon in an amount of about 4.5% to 12.5% by weight of the chemically combined vanadium and carbon.
Claim 2
Dependent Claim
82 words
In a method for hard facing a surface of an iron base alloy substrate by forming a metallurgical bond between a said surface and hard-facing material by heating said surface to its melting point and depositing hard-facing material thereon, the improvement which comprises employing as hard-facing material a composition which consists essentially of chemically combined vanadium and carbon as VC 0 .89 and free carbon in an amount of about 4.5% to 12.5% by weight of the chemically combined vanadium and carbon.
Claim 3
Dependent Claim
15 words
A method in accordance with claim 1 wherein said hard-facing composition is in particulated form.
Claim 4
Dependent Claim
18 words
A method in accordance with claim 1 wherein said hard-facing composition is a sintered material in particulated form.
Claim 5
Dependent Claim
15 words
A method in accordance with claim 1 wherein said composition contains up to 15% cobalt.
Claim 6
Dependent Claim
53 words
A hard-facing rod comprising a metal sheath consisting essentially of a material selected from iron, and steel containing a hard-facing material consisting essentially of chemically combined vanadium and carbon as VC 0 .89 and free carbon in an amount of about 4.5% to 12.5%. by weight of the chemically combined vanadium and carbon.
Claim 7
Dependent Claim
53 words
A hard-facing rod comprising a metal sheath consisting essentially of a material selected from iron, and steel containing a hard-facing material consisting essentially of chemically combined vanadium and carbon as VC 0 .89 and free carbon in an amount of about 4.5% to 12.5%. by weight of the chemically combined vanadium and carbon.
Claim 8
Dependent Claim
23 words
A hard-facing rod in accordance with claim 5 wherein said hard-facing composition is in the form of a sintered material in particulated form.
Claim 9
Dependent Claim
71 words
A hard faced metal surface formed by fusing a portion of metal surface, and depositing on the fused portion of said metal surface a solid composition consisting essentially of chemically combined vanadium and carbon as VC 0 .89 and free carbon in an amount of about 4.5% to 12.5% by weight of the chemically combined vanadium and carbon to provide a metallurgical bond between said solid composition and said metal surface.
Claim 10
Dependent Claim
71 words
A hard faced metal surface formed by fusing a portion of metal surface, and depositing on the fused portion of said metal surface a solid composition consisting essentially of chemically combined vanadium and carbon as VC 0 .89 and free carbon in an amount of about 4.5% to 12.5% by weight of the chemically combined vanadium and carbon to provide a metallurgical bond between said solid composition and said metal surface.
References Cited (Backward Citations)
US3737289A
Cited
US3782930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |