EP0191554A1
Expired / Lapsed
EP
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Coated cemented carbides and manufacture thereof
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1986-01-17
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Granted: —
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Expires: 2006-01-17
Abstract
Abstract 57 A coated cemented carbide with improved wear resistance and suitable toughness is made by coating a cemented carbide by physical vapour deposition with a multilayer coating of which the innermost layer is a titanium layer having a thickness between 0.1 and 1 microns.
Inventors
- 👤 Hiroshi Itami Works Tsukada
- 👤 Masaaki Itami Works Tobioka
- 👤 Toshio Itami Works Nomura
- 👤 Yasuhiro Itami Works Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 07:01
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0664; C23C14/0635; C23C30/00; C23C30/005; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A coated cemented carbide comprising a substrate of a cemented carbide having a multilayer surface coating comprising an innermost layer, in contact with the substrate, constituted by titanium nitride to a thickness of between 0.1 and 1 microns, and at least one further layer comprising any of titanium carbide, titanium nitride and titanium carbonitride.
Claim 2
Dependent Claim
54 words
A coated cemented carbide comprising a substrate of a cemented carbide having a multilayer surface coating comprising an innermost layer, in contact with the substrate, constituted by titanium nitride to a thickness of between 0.1 and 1 microns, and at least one further layer comprising any of titanium carbide, titanium nitride and titanium carbonitride.
Claim 3
Dependent Claim
39 words
A coated cemented carbide according to claim 1 wherein the multilayer coating comprises a second layer of titanium carbide or titanium carbonitride in contact with the said innermost layer, the second layer being between 0.5 and 5 microns thick.
Claim 4
Dependent Claim
30 words
A coated cemented carbide according to claim 1 or claim 2 wherein the multilayer coating comprises an outermost layer of titanium nitride having a thickness between 0.3 and 5 microns.
Claim 5
Dependent Claim
22 words
A coated cemented carbide according to any foregoing claim, wherein the total thickness of the multilayer is between 1 and 10 microns.
Claim 6
Dependent Claim
32 words
A coated cemented carbide according to claim 1, wherein the multilayer coating is a three layer coating of which the intermediate layer is titanium carbide and the outermost layer is titanium carbonitride.
Claim 7
Dependent Claim
33 words
A coated cemented carbide according to claim 1 , wherein the multilayer coating is a three layer coating of which the intermediate layer is titanium carbide and the outermost layer is titanium nitride.
Claim 8
Dependent Claim
37 words
A coated cemented carbide according to claim 1 , wherein the multilayer coating is a three layer coating of which the intermediate layer is titanium carbonitride and the outermost layer is either titanium carbide or titanium nitride.
Claim 9
Dependent Claim
38 words
A coated cemented carbide according to claim 1 , wherein the multilayer coating is a four layer coating of which the outermost layer is titanium nitride and the two intermediate layers are of titanium carbide and titanium carbonitride.
Claim 10
Dependent Claim
25 words
A coated cemented carbide according to any of claims 5 to 8 wherein the total thickness of the multilayer is between 1 and 10 microns.
Claim 11
Independent Claim
43 words
A method of coating a cemented carbide comprising depositing a multilayer coating on a substrate of the cemented carbide, characterised in that the innermost layer of the multilayer coating is provided by depositing, by physical vapour deposition, a thin layer of titanium nitride.
Claim 12
Independent Claim
43 words
A method of coating a cemented carbide comprising depositing a multilayer coating on a substrate of the cemented carbide, characterised in that the innermost layer of the multilayer coating is provided by depositing, by physical vapour deposition, a thin layer of titanium nitride.
References Cited (Backward Citations)
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