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 less than 0.95, the AlTiN layer including a central portion, the central portion at the rake face being occupied in area by (200) oriented AlxTi1-xN crystal grains at a ratio of 50% or more and less than 80%, the central portion at the cutting edge portion being occupied in area by (200) oriented AlxTi1-xN crystal grains at a ratio of 80% or more.

Abstract: A cutting tool includes a substrate and a coating that covers the substrate, the coating includes an ?-Al2O3 layer, and the ?-Al2O3 layer has an orientation index TC(0 0 12) of a (0 0 12) plane not smaller than 4 and not larger than 8.5, an orientation index TC(2 0 14) of a (2 0 14) plane not smaller than 0.5 and not larger than 3, and a total of the orientation index TC(0 0 12) and the orientation index TC(2 0 14) not larger than 9.

Abstract: Provided is a cutting tool including a base material including a rake face and a coating layer that coats the rake face, the coating layer including a matrix region and metal particulates, the matrix region being made of a compound represented by (AlxTiyX1?x?y)CvOwN1?v?w, where X representing at least one element selected from the group consisting of chromium, silicon, niobium, tantalum, tungsten, and boron, the metal particulates containing aluminum or titanium as a constituent element, the metal particulates having particle diameters of more than or equal to 20 nm and less than or equal to 200 nm, a number of the metal particulates being more than or equal to 12 and less than or equal to 36 in a field of view of 3 ?m×4?m in a cross section parallel to a direction of a normal to an interface of the coating layer.

Abstract: Provided is a cutting tool including a base material including a flank face and a coating layer that coats the flank face, the coating layer including a matrix region and metal particulates, the matrix region being made of a compound represented by (AlxTiyX1-x-y)CvOwN1-v-w, where X representing at least one element selected from the group consisting of chromium, silicon, niobium, tantalum, tungsten, and boron, the metal particulates containing aluminum or titanium as a constituent element, the metal particulates having particle diameters of more than or equal to 20 nm and less than or equal to 200 nm, a number of the metal particulates being more than or equal to 12 and less than or equal to 36 in a field of view of 3 ?m×4 ?m in a cross section parallel to a direction of a normal to an interface of the coating layer.

Abstract: A cutting tool includes: a substrate including a rake face; and a coating film that coats the rake face, wherein the coating film includes an ?-Al2O3 layer disposed on the substrate, the ?-Al2O3 layer includes crystal grains of ?-Al2O3, an area ratio of crystal grains oriented in (001) among the crystal grains is 50% to 90% in the ?-Al2O3 layer at the rake face, and a film residual stress AA determined based on a crystal plane interval of a (001) plane of the ?-Al2O3 layer at the rake face is more than 0 MPa and less than or equal to 2000 MPa, and a film residual stress BA determined based on a crystal plane interval of a (110) plane of the ?-Al2O3 layer at the rake face is more than or equal to ?1000 MPa and less than 0 MPa.

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 less than 0.95, the AlTiN layer including a central portion, the central portion at the rake face being occupied in area by (111) oriented AlxTi1-xN crystal grains at a ratio of 50% or more and less than 80%, the central portion at the cutting edge portion being occupied in area by (111) oriented AlxTi1-xN crystal grains at a ratio of 80% or more.

Abstract: 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 AlxCr(1-x)N, the layer B being composed of AlyTi(1-y)N, 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?x?0.8 and y has a range of 0.5?y?0.7.

Abstract: A cutting tool includes: a substrate including a rake face; and a coating film that coats the rake face, wherein the coating film includes an ?-Al2O3 layer disposed on the substrate, the ?-Al2O3 layer includes crystal grains of ?-Al2O3, an area ratio of crystal grains oriented in (001) among the crystal grains is 50% to 90% in the ?-Al2O3 layer at the rake face, a film residual stress AA determined based on a crystal plane interval of a (001) plane of the ?-Al2O3 layer at the rake face is more than or equal to ?1000 MPa and less than 0 MPa, and a film residual stress BA determined based on a crystal plane interval of a (110) plane of the ?-Al2O3 layer at the rake face is more than or equal to ?1000 MPa and less than 0 MPa, and a relational expression of |AA|?|BA| is satisfied.

Abstract: A cutting tool comprises a substrate and a coating that coats the substrate, the coating including an ?-alumina layer, 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 (006) plane with a normal thereto having a direction within ±15° with respect to a direction of a normal to the second interface, the lower portion being occupied in area at a ratio of 5% or more and less than 50% by crystal grains of ?-alumina having (012) plane, (104) plane, (110) plane, (113) plane, (116) plane, (300) plane, (214) plane and (006) plane each with a normal thereto having a direction within t 15° with respect to the direction of the normal to the second interface.

Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Alx1Ti(1-x1) compound and a second layer composed of a second Alx2Ti(1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Alx3Ti(1-x3) compound and a fourth layer composed of a fourth Alx4Ti(1-x4) compound are layered on each other, the first AlTi compound and the second AlTi compound have a cubic crystal structure, the third AlTi compound and the fourth AlTi compound have a cubic crystal structure.

Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Alx1Ti(1-x1) compound and a second layer composed of a second Alx2Ti(1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Alx3Ti(1-x3) compound and a fourth layer composed of a fourth Alx4Ti(1-x4) compound are layered on each other, the first AlTi compound and the third AlTi compound have a hexagonal crystal structure, the second AlTi compound and the fourth AlTi compound have a cubic crystal structure.

Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Alx1Ti(1-x1) compound and a second layer composed of a second Alx2Ti(1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Alx3Ti(1-x3) compound and a fourth layer composed of a fourth Alx4Ti(1-x4) compound are layered on each other.

Abstract: A surface-coated cutting tool includes a base material and a coating covering the base material. The base material includes a rake face and a flank face. The coating includes a TiCN layer. The TiCN layer has a (422) orientation in a region d1 in the rake face. The TiCN layer has a (311) orientation in a region d2 in the flank face.

Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Alx1Ti(1?x1) compound and a second layer composed of a second Alx2Ti(1?x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Alx3Ti(1?x3) compound and a fourth layer composed of a fourth Alx4Ti(1?x4) compound are layered on each other, the first AlTi compound and the second AlTi compound have a cubic crystal structure, the third AlTi compound and the fourth AlTi compound have a cubic crystal structure.

Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Alx1Ti(1-x1) compound and a second layer composed of a second Alx2Ti(1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Alx3Ti(1-x3) compound and a fourth layer composed of a fourth Alx4Ti(1-x4) compound are layered on each other, the first AlTi compound, the second AlTi compound and the fourth AlTi compound have a cubic crystal structure, the third AlTi compound has a hexagonal crystal structure.

Abstract: A surface-coated cutting tool includes a base material and a coating covering the base material. The base material includes a rake face and a flank face. The coating includes a TiCN layer. The TiCN layer has a (311) orientation in a region d1 in the rake face. The TiCN layer has a (422) orientation in a region d2 in the flank face.

Abstract: A cemented carbide includes second hard phase grains, wherein the second hard phase grains includes a core portion, and in a case where a total of 70 unit regions that are each constituted of a square having each side of 8?m are provided by successively arranging 7 unit regions in a longitudinal direction and 10 unit regions in a lateral direction in an electron microscope image of any cross section of the cemented carbide captured at a magnification of 1500×, where the total number of core portions in the total of 70 unit regions is calculated, and where a percentage of the number of core portions in each of the unit regions with respect to the total number of core portions is calculated, the number of unit regions in which the percentage is less than 0.43% or more than 2.43% is less than or equal to 10.

Abstract: The liquid feeding device includes a discharge speed calculation part configured to calculate a discharge speed v of the plunger pump so that a converted value LATM under an atmospheric pressure of a flow rate LPRE of the mobile phase discharged to the discharge channel from the pump part becomes a set flow rate LSET using a volume V of the mobile phase in the pump chamber of the closing pump immediately before the precompression process is started, a volume ?V reduced due to the precompression process of the mobile phase in the pump chamber of the closing pump, and a feeding pressure P; and a discharge operation controller configured to control a discharge speed of the plunger pump to a discharge speed v calculated by the discharge speed calculation part.

Abstract: Even though a pump head part is finally fixed to a pump body with a fixing member, the pump head part is movable relative to the pump body perpendicular to the axial direction of a plunger at a stage before the pump head part is fixed with the fixing member. In this state, if a plunger driving part is moved to a predetermined location on the front end side of the pump body and the pump head part and the plunger driving part are fitted to each other, the pump head part is positioned where the center axis of the plunger and the center axis of the pump chamber are substantially aligned. By fixing the pump head part to the pump body with the fixing member at this location, it is possible to assemble a plunger pump with the center axis of the plunger and the center axis substantially aligned.

Abstract: A cemented carbide comprising a first hard phase composed of tungsten carbide particles and a binder phase including Co, the cemented carbide having a ratio Nt/Na of 0.9 or more, where, in any surface or any cross section of the cemented carbide, a region in which there is a distance X of 5 nm or less between surfaces respectively of tungsten carbide particles adjacent to each other, the surfaces facing each other along a length L of 100 nm or more, is referred to as a WC/WC interface, and Na represents a total number of WC/WC interfaces and Nt represents a number of WC/WC interfaces having distance X of 1 nm or more and 5 nm or less and having therein an atomic percentage of Co higher than an average value of atomic percentages of Co in the tungsten carbide particles.