US4212671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cemented carbide containing molybdenum tungsten carbonitride having WC type structure
Assignee: Santrade Ltd
•
Filing: 1978-01-27
•
Granted: 1980-07-15
•
Expires: 1998-01-27
Abstract
Abstract An improvement in a cemented carbide is disclosed. Molybdenum, tungsten and carbon are mixed and heated in a nitrogen containing atmosphere to form a tungsten-molybdenum carbonitride (Mo, W) (C, N) having the structure of tungsten carbide. The molybdenum-tungsten carbonitride is mixed with a binder metal (and, if desired, another hard material) and sintered in a conventional manner to form a dense, substantially pore-free material which is similar in a number of properties to the more expensive tungsten carbide.
Inventors
- 👤 Peter Ettmayer
- 👤 Richard Kieffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:08
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/04; C01; C01B; C01B21/00; C01B21/082; C01B21/0828
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
59 words
A cemented carbide consisting of one or more hard materials in an amount of 70 to 97% by weight and a binder alloy of iron group metals in amounts of 3 to 30% by weight, characterized in that the hard material part consists of at least 20% by weight of molybdenum-tungsten carbonitride having the structure of tungsten carbide WC.
Claim 2
Dependent Claim
59 words
A cemented carbide consisting of one or more hard materials in an amount of 70 to 97% by weight and a binder alloy of iron group metals in amounts of 3 to 30% by weight, characterized in that the hard material part consists of at least 20% by weight of molybdenum-tungsten carbonitride having the structure of tungsten carbide WC.
Claim 3
Dependent Claim
28 words
The cemented carbide of claim 1 wherein the tungsten-molybdenum carbonitride with the structure of tungsten carbide has a content of nitrogen within the range of 0.05-1.5% by weight.
Claim 4
Dependent Claim
31 words
The cemented carbide of claim 1 wherein the molybdenum-tungsten carbonitride has a composition between the limits (Mo 0 .9 W 0 .1) (C,N) and (Mo 0 .05 W 0 .95) (C,N).
Claim 5
Dependent Claim
31 words
The cemented carbide of claim 3 wherein the molybdenum-tungsten carbonitride has a composition between the limits (Mo 0 .7 W 0 .3) (C,N) and (Mo 0 .4 W 0 .6) (C,N).
Claim 6
Dependent Claim
52 words
The cemented carbide of claim 1 wherein said hard material part of the cemented carbide further contains up to 80% by weight of carbides of the transition metals and/or their mixed crystals, nitrides of the transition metals and/or their mixed crystals, and/or mixed crystals of carbides and nitrides of the transition metals.
References Cited (Backward Citations)
US2036245A
Cited
US3741733A
Cited
US3971656A
Cited
US3994692A
Cited
US4049876A
Cited
US4065301A
Cited
US4120719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |