US4686156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated cemented carbide cutting tool
Assignee: Verizon Corporate Services Group Inc
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Filing: 1985-10-11
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Granted: 1987-08-11
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Expires: 2005-10-11
Abstract
Abstract The present invention is directed to a triple coated cemented hard metal carbide product in which a cemented metal carbide substrate is coated with, first, a metal carbide coating to promote coating adherence to the substrate, secondly, a metal nitride or carbonitride coating to promote crater wear resistance and, thirdly, a metal carbide outer layer to promote flank flank wear resistance in order to protect the cemented metal carbide substrate from corrosive atmosphere and abrasion due to frictional flank wear.
Inventors
- 👤 II J. Gary Baldoni
- 👤 Charles D'Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:59
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; C23; C23C; C23C30/00; C23C30/005
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
116 words
A coated article for cutting tool and flank wear resistant applications which comprises a hard metal substrate and an abrasion resistant and cratering resistant multilayer coating on at least a portion of said substrate, said coating consisting of: (a) a first layer, contiguous with said substrate, and selected from the carbides of metals selected from Titanium, Zirconium, Hafnium, Vanadium, Niobium and Tantalum; (b) a second layer, superposed over said first layer, selected from the nitrides or carbonitrides of metals selected from metals selected from Titanium, Zirconium, Hafnium, Vanadium, Niobium and Tantalum; and (c) a third layer, superposed over said second layer, selected from the carbides of metals selected from Titanium, Zirconium, Hafnium, Vanadium, Niobium and Tantalum.
Claim 2
Dependent Claim
116 words
A coated article for cutting tool and flank wear resistant applications which comprises a hard metal substrate and an abrasion resistant and cratering resistant multilayer coating on at least a portion of said substrate, said coating consisting of: (a) a first layer, contiguous with said substrate, and selected from the carbides of metals selected from Titanium, Zirconium, Hafnium, Vanadium, Niobium and Tantalum; (b) a second layer, superposed over said first layer, selected from the nitrides or carbonitrides of metals selected from metals selected from Titanium, Zirconium, Hafnium, Vanadium, Niobium and Tantalum; and (c) a third layer, superposed over said second layer, selected from the carbides of metals selected from Titanium, Zirconium, Hafnium, Vanadium, Niobium and Tantalum.
Claim 3
Dependent Claim
54 words
A coated article for cutting tool insert and flank wear resistant applications as defined in claim 1, in which a transition layer is formed between said second layer and said third layer, the chemical composition of said transition layer varying from the composition of said second layer to the composition of said third layer.
Claim 4
Dependent Claim
25 words
A coated article for cutting tool insert and flank wear resistant applications as defined in claim 2, wherein said second layer comprises a metal nitride.
Claim 5
Dependent Claim
25 words
A coated article for cutting tool insert and flank wear resistant applications as defined in claim 3, wherein said transition layer comprises a metal carbonitride.
Claim 6
Dependent Claim
54 words
A coated article for cutting tool insert and flank wear resistant applications as defined in claim 1, in which a transition layer is formed between said first layer and said second layer, the chemical composition of said transition layer varying from the composition of said first layer to the composition of said second layer.
Claim 7
Dependent Claim
25 words
A coated article for cutting tool insert and flank wear resistant applications as defined in claim 5, wherein said second layer comprises a metal carbonitride.
Claim 8
Dependent Claim
25 words
A coated article for cutting tool insert and flank wear resistant applications as defined in claim 6, wherein said transition layer comprises a metal carbonitride.
Claim 9
Dependent Claim
52 words
A coated article for cutting tool insert and flank wear resistant applications as defined in claim 1, in which a transition layer is formed between said substrate and said first layer, the chemical composition of said transition layer varying from the composition of said substrate to the composition of said first layer.
Claim 10
Dependent Claim
38 words
A coated article for cutting tool and wear resistant applications as defined in claim 1, in which the overall thickness of the multilayer coating on said substrate is in the range of from about 0.3 to 15 microns.
Claim 11
Dependent Claim
40 words
A coated article for cutting tool and wear resistant applications as defined in claim 1, in which the thickness of the first layer of the coating on said substrate is in the range of from about 0.1 to 5 microns.
Claim 12
Dependent Claim
40 words
A coated article for cutting tool and wear resistant applications as defined in claim 1, in which the thickness of the first layer of the coating on said substrate is in the range of from about 1 to 2 microns.
Claim 13
Dependent Claim
40 words
A coated article for cutting tool and wear resistant applications as defined in claim 1, in which the thickness of the second layer of the coating on said substrate is in the range of from about 0.1 to 5 microns.
Claim 14
Dependent Claim
40 words
A coated article for cutting tool and wear resistant applications as defined in claim 1, in which the thickness of the second layer of the coating on said substrate is in the range of from about 1 to 3 microns.
Claim 15
Dependent Claim
40 words
A coated article for cutting tool and wear resistant applications as defined in claim 1, in which the thickness of the third layer of the coating on said substrate is in the range of from about 0.01 to 5 microns.
Claim 16
Dependent Claim
40 words
A coated article for cutting tool and wear resistant applications as defined in claim 1, in which the thickness of the third layer of the coating on said substrate is in the range of from about 1 to 3 microns.
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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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |