Abstract: A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase, wherein in a first region of a first graph showing results obtained by carrying out line analysis along a first direction going from position X1 provided in the tungsten carbide particles to position X2 provided in the binder phase adjacent to the tungsten carbide particles, a distance PW at a maximum intensity IW of tungsten, a maximum distance PW70 showing an intensity IW70 of 70% of the maximum intensity IW, a distance PV at a maximum intensity IV of vanadium, a distance PCr at a maximum intensity ICr of chromium, a minimum distance PCo70 showing an intensity ICo70 of 70% of a maximum intensity ICo of cobalt, and a distance PCo at the maximum intensity ICo show a relationship PW<PW70<PV<PCr<PCo70<PCo.

Abstract: A cemented carbide includes 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 W1 of tungsten closest to an origin and a further peak W2 of tungsten closest to the peak W1, a ratio IB/IA of an intensity IB to a maximum peak intensity IA of the maximum peak M is 0.5 or less in each of the first element, and the intensity IB is an intensity of the first element at a distance P2.

Abstract: A cemented carbide is composed of a first hard phase, a second hard phase, and a binder phase, wherein the first hard phase is composed of tungsten carbide particles and having a particle diameter D10 of 0.30 ?m to 0.60 ?m, a particle diameter D90 of 0.90 ?m to 1.40 ?m, the second hard phase contains at least one first compound selected from the group consisting of TiNbC, TiNbN, and TiNbCN, and having an average particle diameter of 0.03 ?m to 0.50 ?m, a content of the binder phase in the cemented carbide is 8.0 vol % to 16.0 vol %, an average particle diameter of the binder phase is 0.15 ?m to 0.45, a particle diameter D95 of the binder phase is 1.5 ?m or less, and a degree of dispersion of the binder phase is 0.15 to 0.25.

Abstract: A cemented carbide includes a hard phase and a binder phase, wherein the hard phase has first hard phase grains each composed of tungsten carbide, second hard phase grains including a core portion and a rim portion, a composition of the core portion is represented by M1x1W1-x1C1-y1Ny1, a composition of the rim portion is represented by M2x2W1-x2C1-y2Ny2, each of the M1 and M2 is at least one metal element selected from a group consisting of a group 4 element, a group 5 element in a periodic table, chromium and molybdenum, and the binder phase includes at least one iron group element selected from a group consisting of iron, cobalt and nickel, and a 50% cumulative number grain size of the second hard phase grains is 0.01 ?m or more and 1.0 ?m or less.

Abstract: A cemented carbide includes a tungsten carbide grain and a binder phase, wherein the cemented carbide includes 80 volume % or more of the tungsten carbide grain and the binder phase in total, the cemented carbide includes 0.1 volume % or more and 20 volume % or less of the binder phase, the tungsten carbide grain is composed of a first region and a second region, each of the first region and the second region includes a first metal element, the first metal element is at least one selected from a group consisting of titanium, niobium, and tantalum, a ratio R1 is 0.70 time or more and less than 1.30 times as large as a ratio R2, the R2 is 2.0% or more and 10.0% or less, and the binder phase includes cobalt.

Abstract: 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.

Abstract: A cutting tool comprises a substrate and a coating that coats the substrate, the coating including an ?-alumina layer provided on the substrate, the ?-alumina layer including crystal grains of ?-alumina, the ?-alumina layer including a lower portion and an upper portion, the upper portion being occupied in area at a ratio of 50% or more by crystal grains of ?-alumina having a (006) plane with a normal thereto having a direction within ±15° with respect to a direction of the normal to the second interface, the lower portion being occupied in area at a ratio of 50% or more by crystal grains of ?-alumina having a (110) plane with a normal thereto having a direction within ±15° with respect to the direction of the normal to the second interface, the ?-alumina layer having a thickness of 3 ?m or more and 20 ?m or less.

Abstract: A cemented carbide including tungsten carbide grains and a binder phase, in which a total content of the tungsten carbide grains and the binder phase in the cemented carbide is no less than 80 vol %, a content of the binder phase in the cemented carbide is no less than 0.1 vol % and no more than 20 vol %, in a histogram showing distribution of orientation differences between adjacent pairs each consisting of two of the tungsten carbide grains adjacent to each other in the cemented carbide, a first peak is present in a class of the orientation differences of no less than 29.5° and less than 30.5°.

Abstract: A cutting tool including a rake face, a flank face, and a cutting edge portion, comprising a substrate and an AlTiN layer, the AlTiN layer including cubic AlxTi1-xN crystal grains, Al having an atomic ratio x of 0.7 or more and 0.95 or less, the AlTiN layer including a central portion, the central portion at the rake face being occupied in area by (200) oriented crystal grains at a ratio of 80% or more, the central portion at the flank face being occupied in area by (200) oriented crystal grains at a ratio of 80% or more, the central portion at the cutting edge portion being occupied in area by (200) oriented crystal grains at a ratio of 80% or more.

Abstract: A cemented carbide composed of a first hard phase, a second hard phase and a binder phase, in which the first hard phase is composed of tungsten carbide particles, the second hard phase is composed of at least one first compound selected from the group consisting of TiNbC, TiNbN and TiNbCN, the second hard phase has an average particle diameter of 0.25 ?m or less, the second hard phase has a dispersity of more than 0.70 and 17.0 or less, the second hard phase has a content of 0.1 vol % or more and 15 vol % or less, the binder phase contains at least one first element selected from the group consisting of iron, cobalt and nickel, and the binder phase has a content of 0.1 vol % or more and 19.0 vol % or less.

Abstract: A cemented carbide composed of a first hard phase, a second hard phase and a binder phase, in which the first hard phase is composed of tungsten carbide particles, the second hard phase is composed of at least one first compound selected from the group consisting of TiNbC, TiNbN and TiNbCN, the second hard phase has an average particle diameter of no more than 0.1 ?m, the second hard phase has a dispersity of no more than 0.7, the second hard phase has a content of no less than 0.1 vol % and no more than 15 vol %, the binder phase contains at least one first element selected from the group consisting of iron, cobalt and nickel, and the binder phase has a content of no less than 0.1 vol % and no more than 20 vol %.

Abstract: A cemented carbide composed of a first hard phase, a second hard phase and a binder phase, in which the first hard phase is composed of tungsten carbide particles, the second hard phase is composed of at least one first compound selected from the group consisting of TiNbC, TiNbN and TiNbCN, the second hard phase has an average particle diameter of no more than 0.1 ?m, the second hard phase has a dispersity of no more than 0.7, the second hard phase has a content of no less than 0.1 vol % and no more than 15 vol %, the binder phase contains at least one first element selected from the group consisting of iron, cobalt and nickel, and the binder phase has a content of no less than 0.1 vol % and no more than 20 vol %.

Abstract: A cemented carbide including tungsten carbide grains and a binder phase, in which a total content of the tungsten carbide grains and the binder phase in the cemented carbide is no less than 80 vol %, a content of the binder phase in the cemented carbide is no less than 0.1 vol % and no more than 20 vol %, in a histogram showing distribution of orientation differences between adjacent pairs each consisting of two of the tungsten carbide grains adjacent to each other in the cemented carbide, a first peak is present in a class of the orientation differences of no less than 29.5° and less than 30.5°.

Abstract: A cutting tool includes a substrate and a coated film arranged on the substrate. The coated film includes a first layer. The first layer includes a plurality of crystal grains. The crystal grains are composed of AlxTi1-xCyN1-y, wherein x is more than 0.65 and less than 0.95, and y is not less than 0 and less than 0.1. In a first region, the crystal grains have an average aspect ratio of not more than 3.0. In a second region, the crystal grains have an average aspect ratio of more than 3.0 and not more than 10.0. The crystal grains include crystal grains having a cubic crystal structure. The first layer has a ratio of an area occupied by the crystal grains having a cubic crystal structure of not less than 90%. The first layer has a thickness of not less than 2 ?m and not more than 20 ?m.

Abstract: A cutting tool includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an ?-Al2O3 layer, the ?-Al2O3 layer includes a plurality of ?-Al2O3 crystal grains, and has a TC(006) of more than 5 in texture coefficient TC(hkl), and a hardness H1 of the ?-Al2O3 layer at a room temperature and a hardness H2 of the ?-Al2O3 layer at 800° C. represent a relation of the following expression A-1: 0<{(H1?H2)/H1}×100<60 ??Expression A-1.

Abstract: A cutting tool includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an ?-Al2O3 layer, the ?-Al2O3 layer includes a plurality of ?-Al2O3 crystal grains, and has a TC(006) of more than 5 in texture coefficient TC(hkl), and an elastic modulus E1 of the ?-Al2O3 layer at a room temperature and an elastic modulus E2 of the ?-Al2O3 layer at 800° C. represent a relation of the following expression B-1: 0<{(E1?E2)/E1}×100<10??Expression B-1.

Abstract: A cutting tool includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an ?-Al2O3 layer, the ?-Al2O3 layer includes a plurality of ?-Al2O3 crystal grains, and has a TC (006) of more than 5 in texture coefficient TC (hkl), and a plastic deformation amount hp of the ?-Al2O3 layer at 800° C. is 0 nm or more and 100 nm or less.

Abstract: A cutting tool includes a substrate and a coated film arranged on the substrate. The coated film includes a first layer. The first layer includes a plurality of crystal grains. The crystal grains are composed of AlxTi1?xCyN1?y, wherein x is more than 0.65 and less than 0.95, and y is not less than 0 and less than 0.1. In a first region, the crystal grains have an average aspect ratio of not more than 3.0. In a second region, the crystal grains have an average aspect ratio of more than 3.0 and not more than 10.0. The crystal grains include crystal grains having a cubic crystal structure. The first layer has a ratio of an area occupied by the crystal grains having a cubic crystal structure of not less than 90%. The first layer has a thickness of not less than 2 m and not more than 20 m.

Abstract: A cutting tool includes: a substrate; a hard layer provided on the substrate; and a titanium carbonitride layer provided on the hard layer, wherein a thickness of the titanium carbonitride layer is more than or equal to 2 ?m, a hardness of the titanium carbonitride layer at a room temperature is more than or equal to 35 GPa, and a Young's modulus of the titanium carbonitride layer at the room temperature is less than or equal to 650 GPa.

Abstract: 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 ?m, when PC1 atomic % represents an atomic ratio of the carbon in an interface between the intermediate layer and the alumina layer, and PC2 atomic % represents an atomic ratio of the carbon at a point A away from the interface by 1 ?m on a side of the intermediate layer, a ratio PC1/PC2 of the PC1 to the PC2 being more than or equal to 1.03.