Patent number: 10625348
Abstract: A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, the coating layer including at least one ?-type aluminum oxide layer, wherein, in the ?-type aluminum oxide layer, a texture coefficient TC (2,1,10) of a (2,1,10) plane is 1.4 or more. TC ? ( 2 , 1 , 10 ) = I ? ( 2 , 1 , 10 ) I 0 ? ( 2 , 1 , 10 ) ? { 1 8 ? ? I ? ( h , k , l ) I 0 ? ( h , k , l ) } - 1 ( 1 ) (In formula (1), I (h,k,l) denotes a peak intensity for an (h,k,l) plane in X-ray diffraction of the ?-type aluminum oxide layer, I0 (h,k,l) denotes a standard diffraction intensity for an (h,k,l) plane which is indicated on a JCPDS Card No. 10-0173 for ?-type aluminum oxide, and (h,k,l) refers to eight crystal planes of (0,1,2), (1,0,4), (1,1,0), (1,1,3), (0,2,4), (1,1,6), (2,1,4) and (2,1,10).
Type:
Grant
Filed:
October 30, 2017
Date of Patent:
April 21, 2020
Assignee:
TUNGALOY CORPORATION
Inventor:
Hiroyuki Satoh