US 12,269,097 B2
Coated cutting tool
Takao Katagiri, Iwaki (JP)
Assigned to TUNGALOY CORPORATION, Fukushima (JP)
Filed by TUNGALOY CORPORATION, Fukushima (JP)
Filed on Jun. 8, 2022, as Appl. No. 17/835,109.
Claims priority of application No. 2021-118721 (JP), filed on Jul. 19, 2021.
Prior Publication US 2023/0026334 A1, Jan. 26, 2023
Int. Cl. B23B 27/14 (2006.01); C22C 29/08 (2006.01); C23C 14/06 (2006.01); C23C 14/32 (2006.01)
CPC B23B 27/148 (2013.01) [C22C 29/08 (2013.01); C23C 14/0641 (2013.01); C23C 14/325 (2013.01); B23B 2228/105 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A coated cutting tool comprising a substrate and a coating layer formed on the substrate, wherein
the coating layer comprises a compound layer containing a compound having a composition represented by a following formula (1):
(AlxCryTi1-x-y)N  (1)
(in the formula (1), x represents an atomic ratio of an Al element to a total of the Al element, a Cr element and a Ti element and satisfies 0.70≤x≤0.95, and y represents an atomic ratio of a Cr element to a total of an Al element, the Cr element and a Ti element and satisfies 0.04≤y≤0.21, and 1−x−y>0);
a ratio (Cr/Ti) of the Cr element and the Ti element in the compound layer is 1.0 or more and 2.5 or less; and
an average thickness of the compound layer is 2.0 μm or more and 10.0 μm or less.