US4300952A
Expired / Lapsed
US
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Cemented hard metal
Assignee: Santrade Ltd
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Filing: 1979-02-28
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Granted: 1981-11-17
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Expires: 1999-02-28
Abstract
Abstract An improvement in a cemented hard metal is disclosed. A molybdenum-tungsten-carbonitride is disclosed having the structure of tungsten carbide wherein the molybdenum and/or tungsten are at least partly substituted for by a metal selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof. The carbonitride may be mixed with a binder metal and sintered in a conventional manner to form a dense, substantially pore-free material.
Inventors
- 👤 Nils A. Ingelstrom
- 👤 Leif A. E. Akesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:15
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/04; H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A cemented hard metal comprising one or more hard materials in an amount of 70 to 97 percent by weight and a binder alloy of iron group metals in amounts of 3 to 30 percent by weight, the hard materials consisting of at least 20 percent by weight of a molybdenum-tungsten-carbonitride having the structure of tungsten carbide WC with the molybdenum and/or tungsten being at least partly substituted for by a metal selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof.
Claim 2
Dependent Claim
86 words
A cemented hard metal comprising one or more hard materials in an amount of 70 to 97 percent by weight and a binder alloy of iron group metals in amounts of 3 to 30 percent by weight, the hard materials consisting of at least 20 percent by weight of a molybdenum-tungsten-carbonitride having the structure of tungsten carbide WC with the molybdenum and/or tungsten being at least partly substituted for by a metal selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof.
Claim 3
Dependent Claim
21 words
The cemented hard metal of claim 1 wherein the carbonitride has a nitrogen content within the range of 0.05-15 atomic percent.
Claim 4
Dependent Claim
50 words
The cemented hard metal of claim 1 wherein the carbonitride has the composition (M x Mo y W z ) (C,N) wherein M is selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof and in which x=>0 and up to 0.3 y=0.0-0.95 z=0.05-0.95 and x+y+z=1.
Claim 5
Dependent Claim
11 words
The cemented hard metal of claim 3 wherein M is Cr.
Claim 6
Dependent Claim
42 words
A carbonitride having the composition (M x Mo y W z ) (C,N) wherein M is selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof and in which x=>0 and up to 0.3 y=0.0-0.95 z=0.05-0.95 and x+y+z=1.
Claim 7
Dependent Claim
42 words
A carbonitride having the composition (M x Mo y W z ) (C,N) wherein M is selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof and in which x=>0 and up to 0.3 y=0.0-0.95 z=0.05-0.95 and x+y+z=1.
Claim 8
Dependent Claim
9 words
The carbonitride of claim 5 wherein M is Cr.
Claim 9
Dependent Claim
17 words
The carbonitride of claim 5 wherein the nitrogen content is within the range of 0.05-15 atomic percent.
Claim 10
Dependent Claim
102 words
In a method of making a molybdenum-tungsten-carbonitride having the structure of tungsten carbide WC wherein molybdenum, tungsten, and carbon in proportions sufficient for formation of the monocarbide, are heated in a nitrogen-containing atmosphere at a temperature sufficient to form the said molybdenum-tungsten carbonitride, the improvement comprising: substituting at least one metal M selected from the group consisting of Cr, Nb, Ta, Va, Re and mixtures thereof at least partly for the molybdenum and/or tungsten so as to form a carbonitride having the composition (M x Mo y W z ) (C,N) in which x=>0 and up to 0.3 y=0.0-0.95 z=0.05-0.95 and x+y+z=1.
Claim 11
Dependent Claim
102 words
In a method of making a molybdenum-tungsten-carbonitride having the structure of tungsten carbide WC wherein molybdenum, tungsten, and carbon in proportions sufficient for formation of the monocarbide, are heated in a nitrogen-containing atmosphere at a temperature sufficient to form the said molybdenum-tungsten carbonitride, the improvement comprising: substituting at least one metal M selected from the group consisting of Cr, Nb, Ta, Va, Re and mixtures thereof at least partly for the molybdenum and/or tungsten so as to form a carbonitride having the composition (M x Mo y W z ) (C,N) in which x=>0 and up to 0.3 y=0.0-0.95 z=0.05-0.95 and x+y+z=1.
Claim 12
Dependent Claim
18 words
The method of claim 8 wherein said carbonitride is formed at a temperature between 1000° and 1500° C.
Claim 13
Dependent Claim
35 words
The method according to claim 8 wherein the nitrogen-containing atmosphere contains a mixture of hydrogen and/or noble gas with nitrogen and/or ammonia, the volume ratio of nitrogen-containing gases to non-nitrogen-containing gases being 19:1 to 1:9.
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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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |