US 12,269,100 B2
Insert and cutting tool
Futoshi Isobe, Satsumasendai (JP); Satoshi Mori, Satsumasendai (JP); and Azusa Hagihara, Satsumasendai (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 18/258,326
Filed by KYOCERA CORPORATION, Kyoto (JP)
PCT Filed Dec. 7, 2021, PCT No. PCT/JP2021/044996
§ 371(c)(1), (2) Date Jun. 20, 2023,
PCT Pub. No. WO2022/138146, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2020-218019 (JP), filed on Dec. 25, 2020.
Prior Publication US 2024/0017331 A1, Jan. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B23B 27/20 (2006.01); C04B 35/5831 (2006.01)
CPC B23B 27/20 (2013.01) [C04B 35/5831 (2013.01); B23B 2226/125 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An insert comprising:
a boron nitride sintered body having a first surface, a second surface, and a cutting edge located on at least a part of a ridge part of the first surface and the second surface, wherein
the boron nitride sintered body contains cubic boron nitride and compressed boron nitride, wherein
in a transmission X-ray diffraction of a cross section of the boron nitride sintered body perpendicular to the first surface,
in a direction perpendicular to the first surface
when an X-ray intensity at a top of a 111 diffraction peak of the cubic boron nitride is denoted as IcBN(111)v, and an X-ray intensity at a top of a 002 diffraction peak of the compressed boron nitride is denoted as IhBN(002)v, and
in a direction parallel to the first surface
when an X-ray intensity at a top of a 111 diffraction peak of the cubic boron nitride is denoted as IcBN(111)h, and an X-ray intensity at a top of a 002 diffraction peak of the compressed boron nitride is denoted as IhBN(002)h,
a compressed boron nitride content value indicated by (IhBN(002)v+IhBN(002)h)/(IcBN(111)v+IcBN(111)h) is larger than 0.002 and smaller than 0.01,
a cubic orientation value indicated by IcBN(111)v/(IcBN(111)v+IcBN(111)h) is larger than 0.5, and
a compressed boron nitride orientation value indicated by IhBN(002)v/(IhBN(002)v+IhBN(002)h) is larger than the cubic orientation value; and wherein
a coating layer is provided on at least a part of a surface of the boron nitride sintered body.