US 12,214,428 B2
Insert and cutting tool including same
Ayano Tanaka, Otsu (JP); and Ryoma Nomiyama, Satsumasendai (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 17/605,234
Filed by KYOCERA CORPORATION, Kyoto (JP)
PCT Filed Apr. 20, 2020, PCT No. PCT/JP2020/017056
§ 371(c)(1), (2) Date Oct. 21, 2021,
PCT Pub. No. WO2020/218241, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-080607 (JP), filed on Apr. 22, 2019.
Prior Publication US 2022/0176463 A1, Jun. 9, 2022
Int. Cl. B23B 27/16 (2006.01)
CPC B23B 27/1611 (2013.01) 20 Claims
OG exemplary drawing
 
1. An insert, comprising a base which is a cermet comprising hard particles and a binder phase, wherein
the base comprises
a first surface,
a second surface,
a cutting edge located on at least a part of a ridge line of the first surface and the second surface,
a third surface located opposite to the first surface, and
a through hole from the first surface to the third surface,
an inner wall constituting the through hole comprises a binder-phase-riched layer having a higher content of the binder phase than an inside of the base, at least in a center part,
a thickness T1 of the binder-phase-riched layer in the center part is larger than a thickness T2 of the binder-phase-riched layer in an end part of the inner wall, and
the thickness T1 is 1 μm or more, and 20 μm or less.