Sumitomo Electric Hardmetal Corp.

Sumitomo Electric Industries, Limited

Anongsack Paseuth

Shinya Imamura

Hideaki Kanaoka

Yasuki Kido

Susumu Okuno

Satoshi Ono

Fumiyoshi Kobayashi

Takanori Detani

Yoshihiro Kimura

Yoshio Okada

Minoru Itoh

Hiroyuki Morimoto

Kouhei Yoshimura

Haruko Harada

Haruyo Fukui

Nozomi Tsukihara

Toshihiro Tabata

Erika Iwai

Chikako Kojima

Takahiro Ichikawa

Koji Kuramochi

Chie Suzuki

Keiichi Tsuda

Kazuo Yamagata

Kosuke Tominaga

Katsumi Okamura

Yuki Rikiso

Yuta Koyoshi

A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase, wherein the cemented carbide comprises a total of 80% by volume or more of the tungsten carbide particles and the binder phase, the cemented carbide comprises 0.1 vol % or more and 20 vol % or less of the binder phase, the cemented carbide comprises at least one first element selected from the group consisting of boron, aluminum, silicon, iron, nickel, germanium, ruthenium, rhenium, osmium, iridium, and platinum, the cemented carbide comprises a total of 0.01 atomic % or more and 10 atomic % or less of the first element, the binder phase comprises 50% by mass or more of cobalt, the first element is segregated in a first interface region between the tungsten carbide particles adjacent to each other, and the first element is present at a C site of tungsten carbide in the first interface region.

Cemented carbide and cutting tool using the same

A cutting tool, comprising a substrate and a coating,

Cutting tool

Provided is a cemented carbide comprising a plurality of tungsten carbide grains and a binder phase, wherein the cemented carbide comprises the tungsten carbide grains and the binder phase in a total of 89% by volume or more, the cemented carbide comprises 1.8% by volume or more and 20.0% by volume or less of the binder phase, the binder phase contains cobalt, the cemented carbide contains 1.0% by mass or more of cobalt, and a percentage (H2/H1)×100 of a hardness of the binder phase at 600° C., H2 GPa, to a hardness at 25° C., H1 GPa, as measured by a nanoindenter method is 25% or more.

Cemented carbide

Provided is a cemented carbide comprising a plurality of tungsten carbide grains and a binder phase, wherein the cemented carbide comprises the tungsten carbide grains and the binder phase in a total of 89% by volume or more, the cemented carbide comprises 1.8% by volume or more and 20.0% by volume or less of the binder phase, the binder phase contains cobalt, the cemented carbide contains 1.0% by mass or more of cobalt, and a Young's modulus of the binder phase at 25° C. is 170 GPa or more, as measured by a nanoindenter method.

Provided is a cemented carbide comprising a plurality of tungsten carbide grains and a binder phase, wherein the cemented carbide comprises the tungsten carbide grains and the binder phase in a total of 89% by volume or more, the cemented carbide comprises 1.5% by volume or more and 23% by volume or less of the binder phase, the binder phase contains 40% by mass or more of cobalt, the binder phase further contains at least one first element selected from the group consisting of silicon, phosphorus, germanium, tin, rhenium, ruthenium, osmium, iridium, and platinum, the first element is not segregated in a first interface region between the tungsten carbide grains that are adjacent to each other, and the first element is not segregated in a second interface region between the tungsten carbide grain and binder phase that are adjacent to each other.

Cemented carbide and cutting tool

A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase, wherein the cemented carbide comprises a total of 80% by volume or more of the tungsten carbide particles and the binder phase, the cemented carbide comprises 0.1% by volume or more and 20% by volume or less of the binder phase, the cemented carbide comprises at least one first element selected from the group consisting of titanium, tantalum, niobium, zirconium, hafnium, and molybdenum, the cemented carbide comprises a total of 0.01 atomic % or more and 10.0 atomic % or less of the first element, the binder phase comprises 50% by mass or more of cobalt, and the first element is not segregated in a first interface region between the tungsten carbide particles adjacent to each other.

A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase, wherein the cemented carbide comprises at least one first element selected from the group consisting of titanium, tantalum, niobium, zirconium, cerium, yttrium, and boron, and wherein in a first graph in a coordinate system where an X axis is a distance from a position at which cobalt exhibits a maximum intensity, and a Y axis is a normalized intensity, a maximum peak M of each of the first element is present between a peak Wof tungsten closest to an origin and a further peak Wof tungsten closest to the peak W, a ratio IB/IA of an intensity IB to a maximum peak intensity IA of the maximum peak M is more than 0.5 in each of the first element, and the intensity IB is an intensity of the first element at a distance P

Provided is a cemented carbide comprising a plurality of tungsten carbide grains and a binder phase, wherein the cemented carbide comprises the tungsten carbide grains and the binder phase in a total of 89% by volume or more, the cemented carbide comprises 1.8% by volume or more and 20.0% by volume or less of the binder phase, the binder phase contains cobalt, the cemented carbide contains 1.0% by mass or more of cobalt, and a percentage (Y2/Y1)×100 of a Young's modulus of the binder phase at 600° C., Y2 GPa, to a Young's modulus at 25° C., Y1 GPa, as measured by a nanoindenter method is 50% or more.

Provided is a cutting tool including a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed of a compound made of titanium, carbon, oxygen, and nitrogen, the intermediate layer having a thickness of more than 1 μm, when Patomic % represents an atomic ratio of the oxygen in an interface between the intermediate layer and the alumina layer, and Patomic % represents an atomic ratio of the oxygen at a point A away from the interface by 1 μm on a side of the intermediate layer, a ratio P/Pof the Pto the Pbeing more than or equal to 1.03.

A cutting tool is a cutting tool including: a base; and a coating disposed on the base, wherein the coating includes a first layer, wherein the first layer is composed of α-AlO, a thickness of the first layer is 2 μm or more and 15 μm or less, on a cross section along a normal line of an interface between the base and the coating, a ratio N2/N1 is 0.60 or more, and on the cross section along the normal line of the interface between the base and the coating, a ratio N4/N3 and the ratio N2/N1 satisfy a relationship of a Formula 1.

Provided is a cutting tool including a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed of a compound made of titanium, carbon, oxygen, and nitrogen, the intermediate layer having a thickness of more than 1 μm, when Patomic % represents an atomic ratio of the carbon in an interface between the intermediate layer and the alumina layer, and Patomic % represents an atomic ratio of the carbon at a point A away from the interface by 1 μm on a side of the intermediate layer, a ratio P/Pof the Pto the Pbeing more than or equal to 1.03.

A cutting tool comprising a base material and a coating disposed on the base material, wherein the coating comprises a hard particle layer, the hard particle layer is formed from a plurality of hard particles consisting of titanium, silicon, carbon, and nitrogen, the hard particle layer comprises a first region and a second region, a composition of the first region is TiSiCN, a composition of the second region is TiSiCN, the Xs and the Xb satisfy relationships of Xb−Xs≥0.01 and 0<Xs<Xb≤0.10, the hard particles have a cubic crystal structure, and in the hard particles, a concentration of the silicon changes periodically along a first direction going from the first main surface to the second main surface.

A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an AlOlayer, residual stress of the AlOlayer has a minimum value Rat at least a portion of a region dof the rake face, the minimum value Ris more than −0.27 GPa and less than or equal to −0.1 GPa.

A cutting tool is a cutting tool comprising a substrate and a coating film disposed on the substrate, in which the coating film includes a first layer, the first layer is composed of an alternate layer where a first unit layer and a second unit layer are alternately stacked, the first unit layer is composed of TiAlCeN, a is 0.350 or more and 0.650 or less, b is 0.001 or more and 0.100 or less, the second unit layer is composed of AlCrN, c is 0.40 or more and 0.75 or less, and a and c satisfy a relationship of c>a.

A cutting tool is a cutting tool comprising a substrate and a coating film disposed on the substrate, in which the coating film includes a first layer, the first layer is composed of an alternate layer where a first unit layer and a second unit layer are alternately stacked, the first unit layer is composed of TiAlCeN, a is 0.350 or more and 0.650 or less, b is 0.001 or more and 0.100 or less, the second unit layer is composed of AlVN, c is 0.40 or more and 0.75 or less, and a and c satisfy a relationship of c>a.

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Itami, Japan

Anongsack Paseuth