CPC B23B 27/148 (2013.01) [B23B 27/14 (2013.01); B23B 51/00 (2013.01); B23C 5/16 (2013.01); C23C 16/36 (2013.01); C23C 16/40 (2013.01); C23C 16/403 (2013.01); B23B 2222/28 (2013.01); B23B 2224/04 (2013.01); B23B 2224/32 (2013.01); B23B 2228/04 (2013.01); B23B 2228/105 (2013.01); B23B 2228/36 (2013.01)] | 17 Claims |
1. A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, wherein:
the coating layer comprises at least one α-type aluminum oxide layer, a TiCN layer having an average thickness of from 10 μm or more to 20 μm or less, and an intermediate layer comprised of TiCNO; and
in the α-type aluminum oxide layer, a texture coefficient TC (0,0,12) of a (0,0,12) plane represented by formula (1) below is from 4.0 or more to 8.4 or less, and a texture coefficient TC (0,1,8) of a (0,1,8) plane represented by formula (2) below is from 0.5 or more to 3.0 or less.
(In formulae (1) and (2), I (h,k,l) denotes a peak intensity for an (h,k,l) plane in X-ray diffraction of the α-type aluminum oxide layer, I0 (h,k,l) denotes a standard diffraction intensity for an (h,k,l) plane which is indicated on JCPDS Card No. 10-0173 for α-type aluminum oxide, and (h,k,l) refers to the nine crystal planes of (0,1,2), (1,0,4), (1,1,0), (1,1,3), (1,1,6), (0,1,8), (2,1,4), (3,0,0) and (0,0,12)).
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