| 摘要 |
<p>An object of the invention is to provide a cutting tool having good wear resistance and sliding property and fracture resistance. A cutting tool 1 comprising a substrate 2 and a coating layer 6 or a coating layer 9 which covers a surface of the substrate 2. The coating layer 6 or the coating layer 9 comprising a first layer 7 and a second layer 8. The first layer 7 comprises Ti 1-a-b-c-d Al a W b Si c M d (C 1-x N x ) when M is at least one selected from Nb, Mo, Hf and Y, 0.45 ‰¦a‰¦0.55, 0.01‰¦b‰¦0.1, 0‰¦c‰¦0.05, 0.01‰¦d‰¦0.1, 0‰¦x‰¦1). The second layer 8 comprises Ti 1-e-f-g Al e Si f M' g (C 1-y N y ) when M' is at least one selected from Nb, Mo, Ta, Hf and Y, 0.50‰¦e‰¦ 0.60, 0‰¦f‰¦0.1, 0.05‰¦g‰¦0.15, 0‰¦y‰¦1).</p> |
