Sumitomo Electric Hardmetal Corp.

Sumitomo Electric Industries, Limited

Keizo Tanaka

Haruyo Fukui

Makoto Setoyama

Kouhei Yoshimura

Shinya Imamura

Akira Kobayashi

Yutaka Kobayashi

Kazuhiro Hirose

Koji Kuramochi

Hiroki Takeshita

A surface-coated cutting tool includes: a substrate including a rake face and a flank face; a first coating film that coats the rake face; and a second coating film that coats the flank face, wherein the first coating film includes a first composite nitride layer at a region don the rake face, the second coating film includes a second composite nitride layer at a region don the flank face, the first composite nitride layer includes TiAlTaCN, the second composite nitride layer includes TiAlTaCN.

Surface-coated cutting tool

A cutting tool incudes a substrate and a coating that coats a surface of the substrate, the coating including a multilayer structure layer composed of at least one layer A and at least one layer B alternately deposited from a side closer to the substrate toward a side closer to a surface, the layer A having an average composition of AlCrN, the layer B being composed of TiAlSiN, the layer A being composed of a domain region and a matrix region, the domain region having a composition ratio of Cr larger than that of Cr of the matrix region, wherein x has a range of 0.5&#x2264;x&#x2264;0.8, y has a range of 0.5&#x2264;y&#x3c;0.71, z has a range of 0.29&#x2264;z&#x3c;0.5, and 1&#x2212;y&#x2212;z has a range of 0&#x3c;1&#x2212;y&#x2212;z&#x2264;0.1.

Cutting tool

A surface coated cutting tool comprises a base material and a coating layer that coats the base material, the coating layer including an alternate layer composed of a first unit layer and a second unit layer alternately stacked, the first unit layer being composed of a nitride containing aluminum and zirconium, in the first unit layer, when the total number of metal atoms constituting the first unit layer is represented as 1, a ratio thereto of the number of atoms of the zirconium being not less than 0.65 and not more than 0.95, the second unit layer being composed of a nitride containing titanium and silicon, in the second unit layer, when the total number of metal atoms constituting the second unit layer is represented as 1, a ratio thereto of the number of atoms of the silicon being larger than 0 and not more than 0.20.

Surface coated cutting tool and method for manufacturing the same

A surface coated cutting tool comprises a base material and a coating layer that coats the base material, the coating layer including an alternate layer composed of a first unit layer and a second unit layer alternately stacked, the first unit layer being composed of a nitride containing aluminum and zirconium, in the first unit layer, when the total number of metal atoms constituting the first unit layer is represented as 1, a ratio thereto of the number of atoms of the zirconium being not less than 0.65 and not more than 0.95, the second unit layer being composed of a nitride containing titanium and aluminum, in the second unit layer, when the total number of metal atoms constituting the second unit layer is represented as 1, a ratio thereto of the number of atoms of the aluminum being larger than 0.40 and not more than 0.70.

Provided is a surface-coated cutting tool including a base material and a coating including a super-multilayer-structure layer where A layers and B layers different from the A layers in composition are alternately laminated. The super-multilayer-structure layer includes an X area and a Y area those are alternately repeated. In the X area, A layers having a thickness Aand B layers having a thickness Bare alternately laminated. In the Y area, A layers having a thickness Aand B layers having a thickness Bare alternately laminated. The thickness Ais larger than the thickness A, and the thickness Bis smaller than the thickness B. Each of the A layers and the B layers comprising one or more elements selected from a group consisting of Ti, Al, Cr, Si, Ta, Nb, and W, and one or more elements selected from a group consisting of C and N.

A cutting tool includes a substrate and a coating that coats a surface of the substrate, the coating including a multilayer structure layer composed of at least one layer A and at least one layer B alternately deposited from a side closer to the substrate toward a side closer to a surface, the layer A having an average composition of AlCrN, the layer B being composed of AlTiN, the layer A being composed of a domain region and a matrix region, the domain region having a composition ratio of Cr larger than that of Cr of the matrix region, wherein x has a range of 0.5&#x2264;x&#x2264;0.8 and y has a range of 0.5&#x2264;y&#x2264;0.7.

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.

A surface-coated tool includes a substrate and a coating film formed on the substrate. The coating film includes an alternate layer in which one or more A layers and one or more B layers are alternately stacked. The A layer and the B layer each have a thickness not smaller than 2 nm and not greater than 100 nm. An average composition of the A layer is expressed as TiaAlbSicN (0.5&#x3c;a&#x3c;0.8, 0.2&#x3c;b&#x3c;0.4, 0.01&#x3c;c&#x3c;0.1, a+b+c=1), an average composition of the B layer is expressed as TidAleSifN (0.4&#x3c;d&#x3c;0.6, 0.3&#x3c;e&#x3c;0.7, 0.01&#x3c;f&#x3c;0.1, d+e+f=1), and a condition of 0.05&#x3c;A&#x2212;D&#x2264;0.2 AND 0.05&#x3c;E&#x2212;B&#x2264;0.2 is satisfied.

Growing community of inventors

Itami, Japan

Keizo Tanaka