Abstract: A coated cutting tool comprising a substrate comprising a cubic boron nitride sintered body and a coating layer formed on the substrate, wherein the coating layer comprises a Ti carbonitride layer comprising Ti(CxN1-x); an average thickness of the Ti carbonitride layer is 0.5 ?m or more and 5.0 ?m or less; in the Ti carbonitride layer, R75 is higher than R25; in the Ti carbonitride layer, a texture coefficient TC (111) of a (111) plane is 1.0 or more and 2.0 or less; and in X-ray diffraction measurement of the Ti carbonitride layer, an absolute value of a difference between a maximum value and a minimum value of 2? is 0.1° or less on the (111) plane when the measurement is performed at each of ? angles of 0°, 30°, 50° and 70°.

Abstract: A coated cutting tool comprising a substrate comprising a cubic boron nitride sintered body and a coating layer formed on the substrate, wherein the coating layer comprises a Ti carbonitride layer comprising Ti(CxN1-x); an average thickness of the Ti carbonitride layer is 0.5 ?m or more and 5.0 ?m or less; in the Ti carbonitride layer, R75 is higher than R25; in the Ti carbonitride layer, a texture coefficient TC (111) of a (111) plane is 1.0 or more and 2.0 or less; and in X-ray diffraction measurement of the Ti carbonitride layer, an absolute value of a difference between a maximum value and a minimum value of 2? is 0.1° or less on the (111) plane when the measurement is performed at each of ? angles of 0°, 30°, 50° and 70°.

Abstract: A coated cutting tool, comprising: a substrate made of a cubic boron nitride-containing sintered body; and a coating layer formed on the substrate, wherein the cubic boron nitride-containing sintered body includes 65 volume % or more and 85 volume % or less of cubic boron nitride, and 15 volume % or more and 35 volume % or less of a binder phase; the cubic boron nitride is in a form of particles, the particles having an average particle size from 1.5 ?m or more to 4.0 ?m or less; the coating layer includes a lower layer, and an upper layer formed on the lower layer; the lower layer contains particles each having a composition represented by (Ti1-xAlx)N; the lower layer has an average thickness from 0.1 ?m or more to 1.0 ?m or less; the particles forming the lower layer have an average particle size from 0.01 ?m or more to 0.05 ?m or less; the upper layer contains particles each having a composition represented by (Ti1-yAly)(C1-zNz); and the upper layer has an average thickness from 1.0 ?m or more to 5.

Abstract: A coated cutting tool is provided which has improved wear resistance and fracture resistance and which accordingly has a long tool life. A coated cutting tool comprising a substrate and a coating layer formed on the substrate, wherein: the coating layer comprises at least one composite compound layer containing a compound having a composition represented by (Ti1-xMox)N (wherein x denotes an atomic ratio of the Mo element based on a total of the Ti element and the Mo element and satisfies 0.01?x?0.30); a ratio I(200)/I(111) between a peak intensity I(111) for a (111) plane of cubic crystals of the composite compound layer and a peak intensity I(200) for a (200) plane of the cubic crystals in an X-ray diffraction analysis satisfies 1<I(200)/I(111)?20; and, as to particles which constitute the composite compound layer, an area ratio of particles each having an aspect ratio of 2 or more is 50% or higher.

Abstract: Provided is a coated cutting tool, comprising: a substrate; and a coating layer formed on at least part of a surface of the substrate. The coating layer includes at least one composite nitride layer including a compound having a composition represented by (TixAly)N [x denotes an atomic ratio of a Ti element based on a total of the Ti element and an Al element, y denotes an atomic ratio of the Al element based on a total of the Ti element and the Al element, and 0.10?x?0.50, 0.50?y?0.90, and x+y=1 are satisfied]. The composite nitride layer includes a phase having a lattice constant of from 0.400 nm or more to 0.430 nm or less, and a phase having a lattice constant of from 0.755 nm or more to 0.810 nm or less.

Abstract: Provided is a coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate. The coating layer includes an alternating laminate structure of an alternating laminate of: a first composite nitride layer including a compound having a composition represented by (TixAl1-x)N (wherein x denotes an atomic ratio of the Ti element based on a total of the Ti element and the Al element and satisfies 0.10?x?0.35); and a second composite nitride layer including a compound having a composition represented by (TiyAlzM1-y-z)N (wherein: M denotes an element of at least one kind selected from Zr, Hf, V, Nb, Ta, Cr, Mo, W, Si and Y; y satisfies 0.30?y?0.90; z satisfies 0.10?z?0.70; and y and z satisfy y+z?1). The first composite nitride layer includes a phase having a lattice constant of from 0.400 nm or more to 0.430 nm or less and a phase having a lattice constant of from 0.755 nm or more to 0.810 nm or less.

Abstract: Provided is a coated cutting tool, comprising: a substrate; and a coating layer formed on at least part of a surface of the substrate. The coating layer includes at least one composite nitride layer including a compound having a composition represented by (TixAly)N [x denotes an atomic ratio of a Ti element based on a total of the Ti element and an Al element, y denotes an atomic ratio of the Al element based on a total of the Ti element and the Al element, and 0.10?x?0.50, 0.50?y?0.90, and x+y=1 are satisfied]. The composite nitride layer includes a phase having a lattice constant of from 0.400 nm or more to 0.430 nm or less, and a phase having a lattice constant of from 0.755 nm or more to 0.810 nm or less.

Abstract: A coated cutting tool, comprising: a substrate made of a cubic boron nitride-containing sintered body; and a coating layer formed on the substrate, wherein the cubic boron nitride-containing sintered body includes 65 volume % or more and 85 volume % or less of cubic boron nitride, and 15 volume % or more and 35 volume % or less of a binder phase; the cubic boron nitride is in a form of particles, the particles having an average particle size from 1.5 ?m or more to 4.0 ?m or less; the coating layer includes a lower layer, and an upper layer formed on the lower layer; the lower layer contains particles each having a composition represented by (Ti1-xAlx)N; the lower layer has an average thickness from 0.1 ?m or more to 1.0 ?m or less; the particles forming the lower layer have an average particle size from 0.01 ?m or more to 0.05 ?m or less; the upper layer contains particles each having a composition represented by (Ti1-yAly)(C1-zNz); and the upper layer has an average thickness from 1.0 ?m or more to 5.

Abstract: Provided is a coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate. The coating layer includes an alternating laminate structure of an alternating laminate of: a first composite nitride layer including a compound having a composition represented by (TixAl1-x)N (wherein x denotes an atomic ratio of the Ti element based on a total of the Ti element and the Al element and satisfies 0.10?x?0.35); and a second composite nitride layer including a compound having a composition represented by (TiyAlzM1-y-z)N (wherein: M denotes an element of at least one kind selected from Zr, Hf, V, Nb, Ta, Cr, Mo, W, Si and Y; y satisfies 0.30?y?0.90; z satisfies 0.10?z?0.70; and y and z satisfy y+z?1). The first composite nitride layer includes a phase having a lattice constant of from 0.400 nm or more to 0.430 nm or less and a phase having a lattice constant of from 0.755 nm or more to 0.810 nm or less.

Abstract: A coated cutting tool is provided which has improved wear resistance and fracture resistance and which accordingly has a long tool life. A coated cutting tool comprising a substrate and a coating layer formed on the substrate, wherein: the coating layer comprises at least one composite compound layer containing a compound having a composition represented by (Ti1-xMox)N (wherein x denotes an atomic ratio of the Mo element based on a total of the Ti element and the Mo element and satisfies 0.01?x?0.30); a ratio I(200)/I(111) between a peak intensity I(111) for a (111) plane of cubic crystals of the composite compound layer and a peak intensity I(200) for a (200) plane of the cubic crystals in an X-ray diffraction analysis satisfies 1<I(200)/I(111)?20; and, as to particles which constitute the composite compound layer, an area ratio of particles each having an aspect ratio of 2 or more is 50% or higher.