Title:
COATED CUTTING TOOL AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/1994/028191
Kind Code:
A1
Abstract:
A coated cutting tool suitable for high speed cutting process and a method for producing the same, the tool comprising a base material formed of tungsten-carbide-based cemented carbide and a coating layer on the base material comprising in turn an internal layer and an external layer, wherein the internal layer consists of a single layer of titanium carbonitride in contact with the base material, a double layer consisting of a 0.1 to 2mum thick titanium nitride layer in contact with the base material and a titanium carbonitride layer directly thereon, and a multi-layer prepared by applying another coating of titanium carbide to the titanium carbonitride layer, the tool being characterized in that the chlorine content of the internal layer is 0.05 atomic % or less on average, the peak strength ratio of a specific plane falls within a specific range when the titanium carbonitride is X-ray diffracted, or the internal layer constituting the coating layer consists of a first layer of titanium nitride that contacts the base material and a second layer, placed on the first one, has a hardness ranging from 1600 to 2400 kg/mm2. The realized coating has high wear-resistance, and the coating film and the base material are strongly bonded to each other, thereby providing superior peeling resistance during cutting.
Inventors:
UCHINO KATSUYA (JP)
NOMURA TOSHIO (JP)
OHARA HISANORI (JP)
CHUDO MASUO (JP)
KOBAYASHI MITSUNORI (JP)
NOMURA TOSHIO (JP)
OHARA HISANORI (JP)
CHUDO MASUO (JP)
KOBAYASHI MITSUNORI (JP)
Application Number:
PCT/JP1994/000882
Publication Date:
December 08, 1994
Filing Date:
May 31, 1994
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
UCHINO KATSUYA (JP)
NOMURA TOSHIO (JP)
OHARA HISANORI (JP)
CHUDO MASUO (JP)
KOBAYASHI MITSUNORI (JP)
UCHINO KATSUYA (JP)
NOMURA TOSHIO (JP)
OHARA HISANORI (JP)
CHUDO MASUO (JP)
KOBAYASHI MITSUNORI (JP)
International Classes:
C23C16/32; C23C16/34; C23C16/36; C23C30/00; (IPC1-7): C23C16/30; B23B27/14; B23P15/28
Foreign References:
| JPH0413874A | 1992-01-17 | |||
| JPH03190604A | 1991-08-20 | |||
| JPS6077972A | 1985-05-02 |
Other References:
See also references of EP 0653499A4
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