| CPC B23B 27/148 (2013.01) [B23B 2224/24 (2013.01); B23B 2228/105 (2013.01)] | 12 Claims |
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1. A cutting tool, comprising:
a base; and
a coating disposed on the base, wherein
the coating includes a first A layer,
the first A layer is composed of an alternate layer in which a first unit layer and a third unit layer are alternately stacked, the alternate layer including 4 to 800 of the first unit layers and 4 to 800 of the third unit layers,
the first unit layer has a hexagonal crystal structure,
the first unit layer is composed of W(C1-aNa)x,
a represents 0.3 or more and 0.8 or less,
x represents 0.8 or more and 1.2 or less,
the third unit layer is composed of AldTi1-d-eMeN,
M represents silicon, boron, yttrium, cerium, or lanthanum,
d represents 0.30 or more and 0.75 or less, and
e represents more than 0 and 0.05 or less.
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