US5364209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CVD and PVD coated cutting tools
Assignee: Kennametal Inc
•
Filing: 1994-01-14
•
Granted: 1994-11-15
•
Expires: 2014-01-14
Abstract
Abstract Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The outermost layer of the coating is a PVD layer, containing residual compressive stresses. The substrate is a composite having hard refractory grains bonded together by a binder material.
Inventors
- 👤 Anakkavur T. Santhanam
- 👤 Rajendra V. Godse
- 👤 Dennis T. Quinto
- 👤 Kenneth E. Undercoffer
- 👤 Prem C. Jindal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:01
CPC Classifications
C; C23; C23C; C23C16/00; C23C28/00; C23C28/04; C23C28/044; B; B23; B23B; B23B27/00; B23B27/14; B23B27/148; C23C14/00; C23C14/06; C23C14/0641; C23C14/0664; C23C16/22; C23C16/30; C23C16/34; C23C16/36; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/27
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
140 words
A cutting tool comprising: a rake face and a flank face; a cutting edge at a junction of said rake face and said flank face; said cutting tool having a coating and a substrate; wherein said substrate is a nonbinder enriched tungsten carbide based cemented carbide having a bulk composition of: 0-12 weight percent Ta; 0-6 weight percent Nb; 0-10 weight percent Ti; 8-12 weight percent Co; said coating having a number of layers; said layers including at least one chemical vapor deposition layer and at least one physical vapor deposition layer; wherein the outermost layer of said chemical vapor deposition layer and said physical vapor deposition layer is said physical vapor deposition layer; wherein said chemical vapor deposition layer is adjacent to said substrate; and wherein said physical vapor deposition layer is in a state of residual compressive stress.
Claim 2
Dependent Claim
140 words
A cutting tool comprising: a rake face and a flank face; a cutting edge at a junction of said rake face and said flank face; said cutting tool having a coating and a substrate; wherein said substrate is a nonbinder enriched tungsten carbide based cemented carbide having a bulk composition of: 0-12 weight percent Ta; 0-6 weight percent Nb; 0-10 weight percent Ti; 8-12 weight percent Co; said coating having a number of layers; said layers including at least one chemical vapor deposition layer and at least one physical vapor deposition layer; wherein the outermost layer of said chemical vapor deposition layer and said physical vapor deposition layer is said physical vapor deposition layer; wherein said chemical vapor deposition layer is adjacent to said substrate; and wherein said physical vapor deposition layer is in a state of residual compressive stress.
Claim 3
Dependent Claim
41 words
The cutting tool according to claim 1 wherein said chemical vapor deposition layer includes a layer composed of a hard nitride selected from the group consisting of Ti, Hf, Zr, their alloys with each other and their alloys with other elements.
Claim 4
Dependent Claim
17 words
The cutting tool according to claim 2 wherein the hard nitride layer is adjacent to said substrate.
Claim 5
Dependent Claim
39 words
The cutting tool according to claim 3 wherein said physical vapor deposition layer is selected from the group consisting of the nitrides and carbonitrides of Ti, Zr, Hf, their alloys with each other, and their alloys with other elements.
Claim 6
Dependent Claim
46 words
The cutting tool according to claim 3 wherein said chemical vapor deposition layer further includes a layer composed of a hard carbonitride selected from the group consisting of the carbonitrides of Ti, Hf, Zr and their alloys with each other and their alloys with other elements.
Claim 7
Dependent Claim
39 words
The cutting tool according to claim 5 wherein said physical vapor deposition layer is selected from the group consisting of the nitrides and carbonitrides of Ti, Zr, Hf, their alloys with each other, and their alloys with other elements.
Claim 8
Dependent Claim
28 words
The cutting tool according to claim 6 wherein said tungsten carbide based cemented carbide has a porosity rating consisting of A, B, or A and B type porosity.
Claim 9
Dependent Claim
39 words
The cutting tool according to claim 2 wherein said physical vapor deposition layer is selected from the group consisting of the nitrides and carbonitrides of Ti, Zr, Hf, their alloys with each other, and their alloys with other elements.
Claim 10
Dependent Claim
45 words
The cutting tool according to claim 1 wherein said chemical vapor deposition layer includes a layer composed of a hard carbonitride selected from the group consisting of the carbonitrides of Ti, Hf, Zr and their alloys with each other and their alloys with other elements.
Claim 11
Dependent Claim
39 words
The cutting tool according to claim 9 wherein said physical vapor deposition layer is selected from the group consisting of the nitrides and carbonitrides of Ti, Zr, Hf, their alloys with each other, and their alloys with other elements.
Claim 12
Dependent Claim
39 words
The cutting tool according to claim 1 wherein said physical vapor deposition layer is selected from the group consisting of the nitrides and carbonitrides of Ti, Zr, Hf, their alloys with each other, and their alloys with other elements.
Claim 13
Dependent Claim
28 words
The cutting tool according to claim 1 wherein said tungsten carbide based cemented carbide has a porosity rating consisting of A, B, or A and B type porosity.
Claim 14
Dependent Claim
165 words
A cutting tool comprising: a rake face and a flank face; a cutting edge at a junction of said rake face and said flank face; said cutting tool having a coating and a substrate; wherein said substrate is a nonbinder enriched tungsten carbide based cemented carbide having a bulk composition including: about zero weight percent Ta; about zero weight percent Nb; about zero weight percent Ti; 5-15 weight percent Co; said coating having a number of layers; said layers including at least one chemical vapor deposition layer and at least one physical vapor deposition layer; wherein the outermost layer of said chemical vapor deposition layer and said physical vapor deposition layer is said physical vapor deposition layer; wherein said chemical vapor deposition layer includes a layer which is adjacent to said substrate and is selected from the group consisting of the nitrides of Ti, Zr and Hf and their alloys; and wherein said physical vapor deposition layer is in a state of residual compressive stress.
Claim 15
Dependent Claim
165 words
A cutting tool comprising: a rake face and a flank face; a cutting edge at a junction of said rake face and said flank face; said cutting tool having a coating and a substrate; wherein said substrate is a nonbinder enriched tungsten carbide based cemented carbide having a bulk composition including: about zero weight percent Ta; about zero weight percent Nb; about zero weight percent Ti; 5-15 weight percent Co; said coating having a number of layers; said layers including at least one chemical vapor deposition layer and at least one physical vapor deposition layer; wherein the outermost layer of said chemical vapor deposition layer and said physical vapor deposition layer is said physical vapor deposition layer; wherein said chemical vapor deposition layer includes a layer which is adjacent to said substrate and is selected from the group consisting of the nitrides of Ti, Zr and Hf and their alloys; and wherein said physical vapor deposition layer is in a state of residual compressive stress.
Claim 16
Dependent Claim
45 words
The cutting tool according to claim 13 wherein said chemical vapor deposition layer includes a layer composed of a hard carbonitride selected from the group consisting of the carbonitrides of Ti, Hf, Zr and their alloys with each other and their alloys with other elements.
Claim 17
Dependent Claim
38 words
The cutting tool according to claim 13 wherein said physical deposition layer is selected from the group consisting of the nitrides and carbonitrides of Ti, Zr, Hf, their alloys with each other, and their alloys with other elements.
Claim 18
Dependent Claim
28 words
The cutting tool according to claim 13 wherein said tungsten carbide based cemented carbide has a porosity rating consisting of A, B, or A and B type porosity.
Claim 19
Dependent Claim
14 words
The cutting tool according to claim 16 wherein the bulk composition further includes chromium.
References Cited (Backward Citations)
DE148349C
Cited
US3755866A
Cited
US4101703B1
Cited
US4101703A
Cited
US3882579A
Cited
US3955038A
Cited
US4035541A
Cited
JPS5325282A
Cited
JPS5410491A
Cited
JPS5438755A
Cited
JPS5473392A
Cited
GB1601224A
Cited
US4268569A
Cited
JPS56158372U
Cited
US4402994A
Cited
JPS5798670A
Cited
US4426267A
Cited
US4448802A
Cited
JPS57158372A
Cited
US4610931A
Cited
JPS57192259A
Cited
JPS57192260A
Cited
JPS5918474A
Cited
US4497874A
Cited
EP0149024A2
Cited
US4640869A
Cited
EP0166708A2
Cited
US4770946A
Cited
EP0191554A1
Cited
US4720437A
Cited
JPS629808A
Cited
JPS6256564A
Cited
US4686156A
Cited
US4708037A
Cited
JPS62192576A
Cited
JPS62214166A
Cited
JPS62270764A
Cited
US4776863A
Cited
US4902395A
Cited
US4966501A
Cited
JPH01104773A
Cited
US4828612A
Cited
JPH01183310A
Cited
JPH0230406A
Cited
JPH02109619A
Cited
EP0385283A2
Cited
US4984940A
Cited
US5075181A
Cited
JPH0938755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-14 | 1998-05-16 | 1998-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-14 | 2002-05-16 | 2002-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-14 | 2006-05-16 | 2006-11-15 | $7700.00 | Window Closed / Lapsed |