US3640689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite hard metal product
Assignee: Fansteel Inc
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Filing: 1970-03-04
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Granted: 1972-02-08
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Expires: 1990-03-04
Abstract
Abstract A method of chemical vapor deposition (CVD) of a hard layer on a substrate such as cemented tungsten carbide and the product resulting from such method; the method involves a more rapid and more easily controlled CVD of a hard metal such as titanium carbide, by providing an intermediate layer of a refractory interface barrier such as refractory metal on the cemented carbide materials to prevent deleterious interaction between the substrate and the hard metal layer and to obtain a hard wear surface with good composite strength characteristics and bond to the substrate; the product is the resulting composite substrate with the interface metal and the face metal.
Inventors
- 👤 Frederick A Glaski
- 👤 Robert A Holzl
- 👤 Richard B Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:09
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/32; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12778
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A laminate article for cutting and wear parts comprising a substrate of cobalt-hard metal alloy or composite, a chemically vapor deposited overlay face material on said substrate comprising a carbide of a metal selected from Group IVB having good friction, wear and chemical characteristics, and a chemically vapor-deposited barrier material between said substrate and said overlay material to control diffusion during chemical vapor deposition and to provide resistance to the formation of a low melting liquid phase between the metal of said overlay and cobalt at temperatures of at least 1,200* C.
Claim 2
Dependent Claim
73 words
A laminate article for cutting and wear parts comprising a substrate of cobalt-hard metal alloy or composite, a chemically vapor-deposited overlay face material on said substrate comprising a carbide of a metal selected from Group IVB having good friction, wear and chemical characteristics, and a chemically vapor-deposited barrier material selected from the group of metals in Groups VB, VIB and nitrides of Groups IVB and VB between said substrate and said overlay material.
Claim 3
Dependent Claim
61 words
A laminate article for cutting and wear parts comprising a substrate of cobalt-hard metal alloy or composite, a chemically vapor-deposited overlay face material on said substrate comprising a carbide of a metal selected from Group IVB having good friction, wear and chemical characteristics, and a chemically vapor-deposited overlay of tantalum as a barrier material between said substrate and said overlay material
Claim 4
Dependent Claim
62 words
A laminate article for cutting and wear parts comprising a substrate of cobalt-hard metal alloY or composite, a chemically vapor-deposited overlay face material on said substrate comprising a carbide of a metal selected from Group IVB having good friction, wear and chemical characteristics, and a chemically vapor deposited layer of tungsten as a barrier material between said substrate and said overlay material.
Claim 5
Dependent Claim
63 words
A laminate article for cutting and wear parts comprising a substrate of cobalt-hard metal alloy or composite, a chemically vapor-deposited overlay face material on said substrate comprising a carbide of a metal selected from Group IVB having good friction, wear and chemical characteristics, and a chemically vapor deposited layer of titanium nitride as a barrier material between said substrate and said overlay material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |