Patent EP0196201A1 successfully refreshed from Google Patents.
EP0196201A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A surface-coated cemented carbide article or part
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1986-03-20
•
Granted: —
•
Expires: 2006-03-20
Abstract
Abstract A cemented carbide article or part having a hard coating excellent in heat shielding effect and initial wear resistance is described in which the hard coating comprises an inner layer of TiC and an outer layer of TiC, and an intermediate layer, provided between the inner layer and outer layer, consisting of at least one layer selected from the group consiting of a single layer of TiN and a composite layer with such a structure that a TiN layer is sandwiched in between TiCN layers.
Inventors
- 👤 Masuo C/O Itami Works Chudo
- 👤 Toshio C/O Itami Works Nomura
- 👤 Toshihiro C/O Itami Works Iida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 13:07
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/32; C23C16/34; C23C16/36; C23C16/40; C23C16/403; C23C28/00; C23C28/04; C23C28/044; C23C30/00; C23C30/005; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A surface-coated cemented carbide article having a hard coating layer on the surface thereof, in which the hard coating layer comprises an inner layer of TiC and an outer layer of TiC, and an intermediate layer, provided between the inner layer and outer layer, consisting of at least one layer which is either a single layer of TiN or a composite wherein a TiN layer is sandwiched between TiCN layers.
Claim 2
Dependent Claim
70 words
A surface-coated cemented carbide article having a hard coating layer on the surface thereof, in which the hard coating layer comprises an inner layer of TiC and an outer layer of TiC, and an intermediate layer, provided between the inner layer and outer layer, consisting of at least one layer which is either a single layer of TiN or a composite wherein a TiN layer is sandwiched between TiCN layers.
Claim 3
Dependent Claim
52 words
A surface-coated cemented carbide article according to claim 1, wherein the inner or outer layer of TiC has a thickness of 0.5 to 2.5 microns, the layer of TiN has a thickness of 0.5 to 2.5 microns and each layer of TiCN if any has a thickness of 0.1 to 2.5 microns.
Claim 4
Dependent Claim
32 words
The surface-coated cemented carbide article according to claim 1, wherein the hard coating layer further has an outermost layer of A1 2 0 3 with a thickness of 0.5 to 5 microns.
Claim 5
Dependent Claim
61 words
A surface-coated cemented carbide article according to claim 3, wherein the outermost layer of A1 2 0 3 is coated through a bonding layer coated on the outer layer of TiC, the bonding layer consisting of at least one material selected from the group consisting of TiBN, TiCBN, TiCO, TiNO and TiCNO and having a thickness of 0.3 to 1 micron.
Claim 6
Dependent Claim
24 words
A surface-coated cemented carbide article according to claim 1, wherein the layer of TiC, the intermediate layer and the layer of TiC are repeated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.