US 12,454,012 B2
Coated tool
Hirotoshi Ito, Satsumasendai (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 17/914,740
Filed by KYOCERA CORPORATION, Kyoto (JP)
PCT Filed Mar. 24, 2021, PCT No. PCT/JP2021/012105
§ 371(c)(1), (2) Date Sep. 26, 2022,
PCT Pub. No. WO2021/193677, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-057635 (JP), filed on Mar. 27, 2020.
Prior Publication US 2023/0158578 A1, May 25, 2023
Int. Cl. B23B 27/14 (2006.01); C23C 16/36 (2006.01); C23C 16/40 (2006.01); C23C 28/04 (2006.01)
CPC B23B 27/148 (2013.01) [C23C 16/36 (2013.01); C23C 16/403 (2013.01); C23C 28/042 (2013.01); C23C 28/044 (2013.01); B23B 2224/04 (2013.01); B23B 2224/28 (2013.01); B23B 2224/32 (2013.01); B23B 2224/36 (2013.01); B23B 2228/10 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A coated tool, comprising:
a base; and
a coating film located on the base, the coating film comprising:
an Al2O3 layer, and
a surface layer located in a region from a first surface on a side away from the base in the Al2O3 layer to a second surface that is a surface of the coating film, wherein
the surface layer has a first erosion rate of 0.1 μm/min or less that is obtained from measurement by causing a liquid A, in which 3 mass % of amorphous Al2O3 particles having a mean particle diameter of 1.1-1.3 μm is dispersed in purified water, to collide with the surface layer,
the surface layer has a second erosion rate of 2.0 μm/min or more that is obtained from measurement by causing a liquid B, in which 3 mass % of spherical Al2O3 particles having a mean particle diameter of 2.8-3.2 μm is dispersed in purified water, to collide with the surface layer, and
the surface layer comprises a TiCN layer, a TiN layer, a TiC layer, and a TiCN layer in this order from a side of the Al2O3 layer.