US4497874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated carbide cutting tool insert
Assignee: Carboloy Inc
•
Filing: 1983-04-28
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Granted: 1985-02-05
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Expires: 2003-04-28
Abstract
Abstract A coated carbide insert has a cobalt enriched zone at one decarburized surface, and a thin TiN transition layer over this surface. The cobalt enriched zone and the TiN layer cooperate to support additional thicker layers of hard wear resistant material such as TiC, TiN, and Al 2 O 3 .
Inventors
- 👤 Thomas E. Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:40
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/34; C23C16/02; C23C16/0209; C23C30/00; C23C30/005; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
90 words
A cobalt cemented carbide insert having at least one surface adapted to be a wear resistant surface, said wear resistant surface comprising: (a) a cobalt enriched zone extending in depth from 0-75μ and containing essentially metallic cobalt in an amount of at least about 2 times the average amount in the substrate; (b) the enriched zone being discontinuous in cobalt on its outer surface, by having cobalt dispersion therein similar to that cobalt dispersion just below its surface; and (c) a thin first layer of TiN deposited on said surface.
Claim 2
Dependent Claim
90 words
A cobalt cemented carbide insert having at least one surface adapted to be a wear resistant surface, said wear resistant surface comprising: (a) a cobalt enriched zone extending in depth from 0-75μ and containing essentially metallic cobalt in an amount of at least about 2 times the average amount in the substrate; (b) the enriched zone being discontinuous in cobalt on its outer surface, by having cobalt dispersion therein similar to that cobalt dispersion just below its surface; and (c) a thin first layer of TiN deposited on said surface.
Claim 3
Dependent Claim
29 words
The invention as recited in claim 1 wherein said cobalt enriched zone contains about 10 to 20 wt. % of metallic cobalt at about a 20μ depth TiN layer.
Claim 4
Dependent Claim
18 words
The invention as recited in claim 1 wherein a layer of TiC is deposited on said TiN layer.
Claim 5
Dependent Claim
18 words
The invention recited in claim 2 wherein a layer of TiN is deposited on said cobalt enriched zone.
Claim 6
Dependent Claim
18 words
The invention as recited in claim 3 wherein a layer of TiN is deposited on said TiC layer.
Claim 7
Dependent Claim
18 words
The invention as recited in claim 4 wherein a layer of TiN is deposited on said TiC layer.
Claim 8
Dependent Claim
21 words
The invention as recited in claim 4 wherein a layer of Al 2 O 3 is deposited on said TiC layer.
Claim 9
Dependent Claim
21 words
The invention as recited in claim 4 wherein a layer of Al 2 O 3 is deposited on said TiC layer.
Claim 10
Dependent Claim
19 words
The invention as recited in claim 3 wherein said TiC is in the range of 6.0μ to 12.0μ thickness.
Claim 11
Dependent Claim
19 words
The invention as recited in claim 3 wherein said first TiN layer is in the range of 0.1μ-3.0μ thickness.
Claim 12
Dependent Claim
106 words
A cobalt cemented carbide insert having at least one surface adapted to be a wear resistant surface, said wear resistant surface comprising: (a) a cobalt enriched zone extending in depth from 0-75μ and containing essentially metallic cobalt in an amount of at least about 2 times the average amount in the substrate; (b) the enriched zone being discontinuous in cobalt on its outer surface, by having cobalt dispersion therein similar to that cobalt dispersion just below its surface; (c) a decarburization layer on said cobalt enriched surface comprising a mixture of Ti, TiC, TiCN; and (d) a thin first layer of TiN deposited on said surface.
Claim 13
Dependent Claim
106 words
A cobalt cemented carbide insert having at least one surface adapted to be a wear resistant surface, said wear resistant surface comprising: (a) a cobalt enriched zone extending in depth from 0-75μ and containing essentially metallic cobalt in an amount of at least about 2 times the average amount in the substrate; (b) the enriched zone being discontinuous in cobalt on its outer surface, by having cobalt dispersion therein similar to that cobalt dispersion just below its surface; (c) a decarburization layer on said cobalt enriched surface comprising a mixture of Ti, TiC, TiCN; and (d) a thin first layer of TiN deposited on said surface.
Claim 14
Dependent Claim
117 words
In a process of manufacturing a coated carbide cutting tool insert, the step of: (a) providing a cobalt cemented carbide substrate having adjacent one surface thereof a cobalt enriched zone extending in depth from 10 to 75μ and containing metallic cobalt in the amount of from 10 to 20% by weight; (b) decarburizing said surface by subjecting said surface to an elevated temperature in the presence of H 2 ; (c) vapor depositing a thin layer of TiN of from about 0.1-3.0μ thick on said preparation layer; (d) vapor depositing a thicker layer of TiC of from about 6.0-12.0μ thick on said TiN layer; and (e) vapor depositing a thinner layer of TiN on said TiC layer.
Claim 15
Dependent Claim
117 words
In a process of manufacturing a coated carbide cutting tool insert, the step of: (a) providing a cobalt cemented carbide substrate having adjacent one surface thereof a cobalt enriched zone extending in depth from 10 to 75μ and containing metallic cobalt in the amount of from 10 to 20% by weight; (b) decarburizing said surface by subjecting said surface to an elevated temperature in the presence of H 2 ; (c) vapor depositing a thin layer of TiN of from about 0.1-3.0μ thick on said preparation layer; (d) vapor depositing a thicker layer of TiC of from about 6.0-12.0μ thick on said TiN layer; and (e) vapor depositing a thinner layer of TiN on said TiC layer.
Claim 16
Dependent Claim
28 words
The process as recited in claim 12 where a layer of Al 2 O 3 is vapor deposited on said TiC layer as a substitute for step e.
Claim 17
Dependent Claim
23 words
The process as recited in claim 13 where a thin layer of TiN is vapor deposited on said Al 2 O 3 layer.
Claim 18
Dependent Claim
142 words
In a process of manufacturing a coated carbide cutting tool insert, the step of: (a) providing a cobalt cemented carbide substrate having adjacent one surface thereof a cobalt enriched zone extending in depth from 10 to 75μ and containing elemental cobalt in the amount of from 10 to 20% by weight; (b) decarburizing said surface by subjecting said surface to an elevated temperature in the presence of H 2 and TiCl 4 to provide a very thin preparation layer of from about 0.1 to 1.0μ thick and incorporating one or more of TiC and TiCN; (c) vapor depositing a thin layer of TiN of from about 0.1-3.0μ thick on said preparation layer; (d) vapor depositing a thicker layer of TiC of from about 6.0-12.0μ thick on said TiN layer; and (e) vapor depositing a thinner layer of TiN on said TiC layer.
Claim 19
Dependent Claim
142 words
In a process of manufacturing a coated carbide cutting tool insert, the step of: (a) providing a cobalt cemented carbide substrate having adjacent one surface thereof a cobalt enriched zone extending in depth from 10 to 75μ and containing elemental cobalt in the amount of from 10 to 20% by weight; (b) decarburizing said surface by subjecting said surface to an elevated temperature in the presence of H 2 and TiCl 4 to provide a very thin preparation layer of from about 0.1 to 1.0μ thick and incorporating one or more of TiC and TiCN; (c) vapor depositing a thin layer of TiN of from about 0.1-3.0μ thick on said preparation layer; (d) vapor depositing a thicker layer of TiC of from about 6.0-12.0μ thick on said TiN layer; and (e) vapor depositing a thinner layer of TiN on said TiC layer.
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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) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |