US 12,151,289 B2
Coated tool and cutting tool including same
Hirotoshi Ito, Satsumasendai (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 17/298,025
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Nov. 27, 2019, PCT No. PCT/JP2019/046374
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/111122, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-223527 (JP), filed on Nov. 29, 2018.
Prior Publication US 2022/0088686 A1, Mar. 24, 2022
Int. Cl. B23B 27/14 (2006.01); C23C 28/04 (2006.01)
CPC B23B 27/148 (2013.01) [C23C 28/042 (2013.01); C23C 28/044 (2013.01); B23B 2224/28 (2013.01); B23B 2224/32 (2013.01); B23B 2224/36 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A coated tool, comprising:
a base; and
a coating layer located on the base,
wherein
the coating layer comprises a first layer having a thickness of 1 μm or more located near the base, and a second layer located more away from the base than the first layer,
an erosion rate A2 in the second layer is 0.4 μm/g or less which is obtained from a measurement by collision of a liquid A, in which 3 mass % of spherical Al2O3 particles having a mean particle diameter of 1.1-1.3 μm is dispersed in pure water, against the second layer at approximately right angles and at a speed of 98-102 m/s,
an erosion rate A1 in the first layer is 1.8 μm/g or less which is obtained from a measurement by collision of the liquid A against the first layer at approximately right angles and at a speed of 98-102 m/s,
the erosion rate A1 is 1.5 μm/g or less, and
the erosion rate A2 is 0.35 μm/g or less.