Kyocera Corporation

Ayano Tanaka

Ryoma Nomiyama

An insert includes a base of a cermet including hard particles and a binder phase. The base includes first and second surfaces, a cutting edge on at least a part of a ridge line of the first and second surfaces, a third surface opposite to the first surface, and a through hole from the first surface to the third surface. An inner wall constituting the through hole includes 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 of the binder-phase-ricked layer in the center part is larger than a thickness of the binder-phase-ricked layer in an end part of the inner wall. A cutting tool includes a holder which has a pocket located at an end, the insert located in the pocket, and a clamp inserted in the through hole of the insert.

Insert and cutting tool including same

A coated tool of the present disclosure may include a base and a coating layer covering at least a part of the base. The base may include a hard phase of a carbonitride including Ti and a binder phase including at least one of Co and Ni and has a thermal expansion coefficient at 25 to 1000&#xb0; C. of 9.0&#xd7;10/&#xb0; C. or more. The coating layer may include a TiCN layer and an AlOlayer positioned on the TiCN layer. The TiCN layer may have a compressive stress of 250 to 500 MPa. The AlOlayer may have a thickness of 2 &#x3bc;m or more and a compressive stress of 450 MPa or more, and the value of the compressive stress is greater than the compressive stress of the TiCN layer.

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Satsumasendai, Japan

Ayano Tanaka