US4587174A
Expired / Lapsed
US
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Tungsten cermet
Assignee: Mitsubishi Metal Corp
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Filing: 1983-12-23
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Granted: 1986-05-06
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Expires: 2003-12-23
Abstract
Abstract A tungsten cermet for use in cutting tools, including a carbonitride, having titanium and tungsten, and aluminum oxide. The cermet contains about 10 to about 50% by weight of the carbonitride, about 0.5 to about 10% by weight of aluminum oxide and tungsten as a binder. The tungsten cermet has excellent properties in toughness, impact resistance and oxidation resistance, combined with wear resistance and plastic deformation resistance, and is useful for cutting tools used in heavy cutting, hot working and the like.
Inventors
- 👤 Hironori Yoshimura
- 👤 Naohisa Ito
- 👤 Kenichi Nishigaki
- 👤 Katsunori Anzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:44
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/04; C22C29/00; C22C32/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
52 words
A tungsten cermet for use in cutting tools, including a carbonitride having titanium and tungsten, the cermet consisting essentially of, about 10 to about 50% by weight of the carbonitride, about 0.5 to about 10% by weight of aluminum oxide, not more than about 1% by weight of inevitable impurities, balance tungsten.
Claim 2
Dependent Claim
52 words
A tungsten cermet for use in cutting tools, including a carbonitride having titanium and tungsten, the cermet consisting essentially of, about 10 to about 50% by weight of the carbonitride, about 0.5 to about 10% by weight of aluminum oxide, not more than about 1% by weight of inevitable impurities, balance tungsten.
Claim 3
Dependent Claim
33 words
A tungsten cermet as recited in claim 1 wherein the cermet contains about 25 to about 45% by weight of the carbonitride and about 3 to about 7% by weight of aluminum oxide.
Claim 4
Dependent Claim
35 words
A tungsten cermet as recited in claim 1 wherein the cermet contains about 0.25 to about 5% by weight of aluminum oxide and further contains about 0.25 to about 5% by weight of yttrium oxide.
Claim 5
Dependent Claim
43 words
A tungsten cermet as recited in claim 3 wherein the cermet contains about 25 to about 45% by weight of the carbonitride, about 2 to about 3.5% by weight of aluminum oxide and about 1.5 to about 3% by weight of yttrium oxide.
Claim 6
Dependent Claim
78 words
A blade member for cutting tools, machined from the tungsten cermet as recited in claim 1, wherein the blade member is coated with at least one layer composed of one substance selected from the group consisting of an oxide and an oxynitride of aluminum; a carbide, a nitride, a carbonitride and an oxycarbonitride of titanium; a carbide, a nitride, a carbonitride and an oxycarbonitride of zirconium; and a carbide, a nitride, a carbonitride and an oxycarbonitride of hafnium.
Claim 7
Dependent Claim
26 words
A blade member as recited in claim 5 wherein the thickness of the coating layer is within a range of about 0.5 to about 20 μm.
Claim 8
Dependent Claim
78 words
A blade member for cutting tools, machined from the tungsten cermet as recited in claim 2 wherein the blade member is coated with at least one layer composed of one substance selected from the group consisting of an oxide and an oxynitride of aluminum; a carbide, a nitride, a carbonitride and an oxycarbonitride of titanium; a carbide, a nitride, a carbonitride and an oxycarbonitride of zirconium; and a carbide, a nitride, a carbonitride and an oxycarbonitride of hafnium.
Claim 9
Dependent Claim
78 words
A blade member for cutting tools, machined from the tungsten cermet as recited in claim 3 wherein the blade member is coated with at least one layer composed of one substance selected from the group consisting of an oxide and an oxynitride of aluminum; a carbide, a nitride, a carbonitride and an oxycarbonitride of titanium; a carbide, a nitride, a carbonitride and an oxycarbonitride of zirconium; and a carbide, a nitride, a carbonitride and an oxycarbonitride of hafnium.
Claim 10
Dependent Claim
78 words
A blade member for cutting tools, machined from the tungsten cermet as recited in claim 4 wherein the blade member is coated with at least one layer composed of one substance selected from the group consisting of an oxide and an oxynitride of aluminum; a carbide, a nitride, a carbonitride and an oxycarbonitride of titanium; a carbide, a nitride, a carbonitride and an oxycarbonitride of zirconium; and a carbide, a nitride, a carbonitride and an oxycarbonitride of hafnium.
Claim 11
Dependent Claim
26 words
A blade member as recited in claim 7 wherein the thickness of the coating layer is within a range of about 0.5 to about 20 μm.
Claim 12
Dependent Claim
26 words
A blade member as recited in claim 8 wherein the thickness of the coating layer is within a range of about 0.5 to about 20 μm.
Claim 13
Dependent Claim
26 words
A blade member as recited in claim 9 wherein the thickness of the coating layer is within a range of about 0.5 to about 20 μm.
References Cited (Backward Citations)
US4447263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |