Sumitomo Electric Industries, Limited

Sumitomo Electric Hardmetal Corp.

Koji Kuramochi

Anongsack Paseuth

Shinya Imamura

Yasuki Kido

Haruyo Fukui

Makoto Setoyama

Nozomi Tsukihara

Toshihiro Tabata

Keizo Tanaka

Akira Kobayashi

A cutting tool, including: a base; and a coating disposed on the base, wherein the coating includes a first layer composed of hexagonal W(CN), a represents 0.3 or more and 0.8 or less, and x represents 0.8 or more and 1.2 or less.

Cutting tool

A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of AlTi, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of AlTi, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.

Surface-coated cutting tool and method for manufacturing the same

A surface-coated cutting tool includes a substrate composed of cemented carbide and a coating film. The coating film includes an intermediate layer in contact with the substrate and an upper layer formed on the intermediate layer. The upper layer is made up of a single layer consisting of an upper base layer which is a layer in contact with the intermediate layer or multiple layers constituted of two or more layers. A mismatch in lattice interplanar spacing in an interface region between the substrate and the intermediate layer is not higher than 65% of a theoretical value of a mismatch in lattice interplanar spacing between the substrate and the upper base layer. A mismatch in lattice interplanar spacing in an interface region between the intermediate layer and the upper base layer is not higher than 65% of the theoretical value of the mismatch in lattice interplanar spacing between the substrate and the upper base layer.

Surface-coated cutting tool

Growing community of inventors

Itami, Japan

Koji Kuramochi