Sumitomo Electric Hardmetal Corp.

Sumitomo Electric Industries, Limited

Nissin Electric Co., Ltd.

Nippon Itf, Inc

Makoto Setoyama

Haruyo Fukui

Katsumi Okamura

Satoru Kukino

Nozomi Tsukihara

Hideki Moriguchi

Keizo Tanaka

Takashi Yoshioka

Shinya Imamura

Tetsuo Nakai

Naoya Omori

Mitsuhiro Goto

Kouhei Yoshimura

Akira Kobayashi

Kiyoshi Ogata

Mitsunori Kobayashi

Yoshiharu Utsumi

Hisanori Ohara

Kazuo Yamagata

Motoyuki Tanaka

Yusuke Matsuda

Sachiko Koike

Naoto Okazaki

Akira Nakayama

Yasuhisa Hashimoto

Miki Irie

Momoko Iida

Akihiko Shibata

Satoshi Ohtani

Akihiko Ikegaya

Naoki Watanobe

Keiichi Tsuda

Yutaka Kobayashi

Junya Okida

Miki Miyanaga

Daiji Tabayashi

Koji Kuramochi

Hiroki Takeshita

Kenta Sano

Kazuhiko Irisawa

Kazushi Takahama

Hideo Yanashima

Takashi Yoshida

Yinxue Xiao

Yasunori Kobayashi

A cutting tool comprises a rake face and a flank face, the cutting tool being composed of a substrate made of a cubic boron nitride sintered material and a coating provided on the substrate, the coating including a MAlN layer, when a cross section of the MAlN layer is subjected to an electron backscattering diffraction image analysis to determine a crystal orientation of each of the crystal grains of the MAlN and a color map is created based thereon, then on the color map, the flank face having the MAlN layer occupied in area by 45% to 75% by crystal grains of the MAlN having a (111) plane with a normal thereto extending in a direction within 25 degrees with respect to a direction in which a normal to the flank face extends, the MAlN layer having a residual stress of −2 GPa to −0.1 GPa.

Cutting tool

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 comprises a rake face and a flank face, the cutting tool being composed of a substrate made of a cubic boron nitride sintered material and a coating provided on the substrate, the coating including a MAlN layer, the MAlN layer including crystal grains of MAlN in the cubic crystal system, n&#x3c;nbeing satisfied, where nrepresents a number of voids per 100 &#x3bc;m in length of the MAlN layer on the flank face in a cross section of the MAlN layer, and nrepresents a number of voids per 100 &#x3bc;m in length of the MAlN layer on the rake face in a cross section of the MAlN layer, nbeing 3 or less, where nrepresents a number of droplets per 100 &#x3bc;m in length of the MAlN layer on the flank face in a cross section of the MAlN layer.

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 cutting tool includes a base material, and a coating film covering the base material in contact with the base material. The base material is a cubic boron nitride sintered material. The coating film is a ceramic. An amount of oxygen in the coating film is less than or equal to 0.040 mass percent.

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 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 cutting tool includes a base material and a coating film provided on a surface of the base material, wherein the coating film includes a first alternating layer provided on the base material and a second alternating layer provided on the first alternating layer, the first alternating layer includes A and B layers, the second alternating layer includes C and D layers, each of one or plurality of the A layers is composed of a nitride or carbonitride of AlCrM1, each of one or plurality of the B layers is composed of a nitride or carbonitride of AlTiM2, each of one or plurality of the C layers is composed of a nitride or carbonitride of TiSiM3, and each of one or plurality of the D layers is composed of a nitride or carbonitride of TiSiM4.

Surface-coated cutting tool and method for manufacturing same

A composite sintered material contains cubic boron nitride particles and binder particles. The composite sintered material contains 40 vol % or more and 80 vol % or less of the cubic boron nitride particles. The binder particles contain TiCN particles. The composite sintered material shows a first peak belonging to a (200) plane of the TiCN particles in a range in which a Bragg angle 2&#x3b8; is 41.7&#xb0; or more and 42.6&#xb0; or less in an X-ray diffraction spectrum measured using a Cu-K&#x3b1; ray as a ray source.

Composite sintered material and surface-coated boron nitride sintered material tool

A surface-coated boron nitride sintered body tool includes a cubic boron nitride sintered body and a coating film formed thereon. The coating film includes an A layer and a C layer. The A layer is formed of TiMaCN(where Ma is one or more of Cr, Nb and W; 0&#x2264;xa&#x2264;0.7; 0&#x2264;ya&#x2264;1). The C layer is formed of AlCrMcN (where Mc is one or more of Ti, V and Si; 0.2&#x2264;xc&#x2264;0.8; 0&#x2264;yc&#x2264;0.6; 0.2&#x2264;xc+yc&#x2264;0.8). The A layer is formed on an outermost surface of the coating film or between the outermost surface of the coating film and the C layer. A distance between the outermost surface of the coating film and an upper surface of the C layer is 0.1 &#x3bc;m or more and 1.0 &#x3bc;m or less.

Surface-coated boron nitride sintered body tool

A surface-coated boron nitride sintered body tool is provided, in which at least a cutting edge portion includes a cubic boron nitride sintered body and a coating film formed on a surface of the cubic boron nitride sintered body. The coating film contains Si and includes a B layer formed by alternately stacking one or more of each of a B1 compound layer and a B2 compound layer that are different in composition. A ratio between an average thickness tof the B1 compound layers and an average thickness tof the B2 compound layers is defined as t/tthat satisfies a relation of 0.5&#x3c;t/t&#x2264;10.

A surface-coated boron nitride sintered body tool is provided, in which a cutting edge portion includes a compound sintered body and a coating layer. The compound sintered body includes cBN particles. The compound sintered body includes 45-80 vol % of cBN particles. A first particle size distribution curve of the cBN particles has one or more peaks in a range in which a particle size is 0.1-0.7 &#x3bc;m. A second particle size distribution curve of the cBN particles has a first peak having a maximum peak height in a range in which the particle size is 2.0-7.0 &#x3bc;m. An integral value ratio (I/I&#xd7;100) is 1-20, in the second particle size distribution curve, the integral value Ibeing in the range in which the particle size is 0.1-0.7 &#x3bc;m, and the integral value Ibeing in an entire range.

A cutting tool includes a base material and a coating formed on the base material. The base material is a sintered body containing 30 to 80% by volume of cubic boron nitride, and a binder. The surface in contact with the coating, of the base material, has a plurality of convex portions made of the cubic boron nitride and a plurality of concave portions made of the binder. A surface roughness Rsub of the surface in contact with the base material, is 0.1 to 0.4 &#x3bc;m. A surface roughness Rsurf of an outermost surface of the coating is 0 to 0.15 &#x3bc;m. A surface roughness Rasurf of the outermost surface of the coating is 0 to 0.1 &#x3bc;m. The surface roughness Rsub of the surface in contact with the coating, of the base material, is greater than the surface roughness Rsurf of the outermost surface of the coating.

A surface-coated boron nitride sintered body tool is provided, in which at least a cutting edge portion includes a cubic boron nitride sintered body and a coating film formed on a surface of the cubic boron nitride sintered body. The coating film includes an A layer and a B layer. The A layer is formed of columnar crystals each having a particle size of 10 nm or more and 400 nm or less. The B layer is formed of columnar crystals each having a particle size of 5 nm or more and 70 nm or less. The B layer is formed by alternately stacking two or more compound layers having different compositions. The compound layers each have a thickness of 0.5 nm or more and 300 nm or less.

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Itami, Japan

Makoto Setoyama