US 11,717,893 B2
Coated cutting tool
Hiroyuki Satoh, Iwaki (JP); and Yusuke Hirano, Iwaki (JP)
Assigned to TUNGALOY CORPORATION, Fukushima (JP)
Appl. No. 16/339,337
Filed by TUNGALOY CORPORATION, Fukushima (JP)
PCT Filed Oct. 6, 2017, PCT No. PCT/JP2017/036416
§ 371(c)(1), (2) Date Apr. 3, 2019,
PCT Pub. No. WO2018/079228, PCT Pub. Date May 3, 2018.
Claims priority of application No. 2016-207734 (JP), filed on Oct. 24, 2016.
Prior Publication US 2019/0283143 A1, Sep. 19, 2019
Int. Cl. B23B 27/14 (2006.01); C23C 16/36 (2006.01); C23C 16/40 (2006.01); B23C 5/16 (2006.01); B23B 51/00 (2006.01)
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.

OG Complex Work Unit Math
(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)).