Kyocera Corporation

YaoCan Zhu

Masahiro Waki

Tatsuyuki Nakaoka

Shuichi Tateno

Kenji Noda

Takahiko Makino

Takashi Watanabe

An object of embodiments according to the invention is to provide a cutting tool having good wear resistance, good sliding property and good fracture resistance. A cutting toolcomprising a substrateand a coating layeror a coating layerwhich covers a surface of the substrate. The coating layeror the coating layercomprising a first layerand a second layer. The first layercomprises TiAlWSiM(CN) when M is at least one selected from Nb, Mo, Hf and Y, 0.45&#x2266;a&#x2266;0.55, 0.01&#x2266;b&#x2266;0.1, 0&#x2266;c&#x2266;0.05, 0.01&#x2266;d&#x2266;0.1, 0&#x2266;x&#x2266;1). The second layercomprises TiAlSiM'(CN) when M&#x2032; is at least one selected from Nb, Mo, Ta, Hf and Y, 0.50&#x2266;e&#x2266;0.60, 0&#x2266;f&#x2266;0.1, 0.05&#x2266;g&#x2266;0.15, 0&#x2266;y&#x2266;1).

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Kagoshima, Japan

YaoCan Zhu