Abstract: A coated cutting insert according to the present invention includes a base layer formed on a substrate and an indicating layer formed on a part of the base layer. The indicating layer is formed on a flank face, on the base layer on the entire surface or a part of a region A2 except for a specific region A1, and on a rake face, on the base layer on the entire surface or a part of a region B2 except for a specific region B1. In the region A1 and the region B1, the base layer is exposed at the surface, and has compressive residual stress in one or both of the region A1 and the region B1.

Abstract: The present invention relates to a coated cutting tool (1) including a substrate (8) and a coating (9) formed on the substrate (8), wherein the coating (9) includes a first coating (10) composed of TiCN and a second coating (11) composed of ?-Al2O3, the first coating (10) is positioned between the substrate (8) and the second coating (11) and has tensile stress S1, the second coating (11) has compressive stress S2, and the tensile stress S1 and the compressive stress S2 are defined by the following equation (I): 400 MPa?|S2?S1|?3500 MPa??(I).

Abstract: A surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) and a second surface (107) of the substrate (104) is A, a difference between the maximum and minimum thicknesses of the coating layer (108) is 0.04×A or less. Also, a surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) of the substrate (104) is B1, and the average thickness of the coating layer (108) on a second surface (107) of the substrate (104) is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is 0.04 or less.

Abstract: A indexable insert (1) of the present invention has a structure including at least a rake face (2) and a bearing surface (5), the indexable insert (1) including a substrate and a coating layer disposed on the substrate, wherein the coating layer includes one or more layers, and at least one layer of the one or more layers covers the entire surface of the substrate and satisfies the relationship F1<F2, wherein F1 represents the residual stress in the rake face (2) and F2 represents the residual stress in the bearing surface (5).

Abstract: A fluid control method for maintaining a split flow ratio of main gas to be split from a main line into first and second sublines constant before and after additive gas is supplied to one of the sublines is achieved by controlling a flow rate of the main gas to be supplied from the main line to a chamber through the first and second sublines based on the pressure in each of the first and second sublines when the additive gas is to be supplied to the second subline. The pressure in the first subline not supplied with the additive gas is controlled to remain constant during supply of the additive gas to the second subline.

Abstract: An indexable cutting insert (1) of the present invention includes at least one face (2), at least two flanks (3), at least one edge line (4), at least one corner (9), and a base layer having a different color from a use-state indicating layer. The use-state indicating layer is formed on at least one of the flanks (3) so that the use-state indicating layer is formed on the base layer over the entire surface or a part of a region A2 excluding at least one region A1 of 2 mm2 containing at least one corner (9).

Abstract: A surface-coated cutting tool comprising a substrate, and a coating formed thereon, characterized in that the coating includes a first coating containing TiCN and a second coating containing ?-type Al2O3, the first coating is interposed between the substrate and the second coating, and the second coating has compressive stress S1 on the rake face and tensile stress S2 on the flank face, with the compressive stress S1 and the tensile stress S2 being defined by the following expression; 441 MPa?|S1?S2|?3500 MPa.

Abstract: The present invention relates to a coated cutting tool wherein a ceramic film is formed on a cemented carbide substrate. The substrate is equipped with a ridge line of a cutting edge upon which round honing or combination honing has been performed, a breaker disposed on a rake face connected to the ridge line of the cutting edge, a base face, and an insert hole for securing to a holder. The nose radius is set to at least 1.6 mm. The ceramic film is equipped with an ?-type aluminum oxide film. The ten-point average roughness Rz (5 microns reference length) is set to no more than 0.2 microns for the inside of the honed section, the flank face side of the honed section, and the rake face side of the honed section. The ten-point average roughness Rz is set to no more than 0.5 microns for the upper section of the breaker, the base face, and the area around the insert hole.

Abstract: An indexable insert (1) of the present invention includes a substrate (8) and a coating layer which includes inner layer and an outer layer. The inner layer includes an alumina layer or an alumna-containing layer serving as an outermost layer in contact with the outer layer, and the outer layer is composed of at least one metal selected from the group consisting of the periodic table group IVa elements, Va elements, and VIa elements, Al, and Si or a compound of at least one of the metals and at least one element selected from the group consisting of carbon, nitrogen, oxygen, and boron. In addition, the outer layer, in a portion involved in cutting, satisfies B/A?0.9 wherein A ?m is the average thickness on the flank face (3) side, and B ?m is the average thickness on the rake face (2) side.

Abstract: An indexable insert (1) of the present invention has a structure including at least a rake face (2) and a bearing surface (5), the indexable insert (1) including a substrate and a coating layer disposed on the substrate, wherein the coating layer includes one or more layers and satisfies the relationship 0.9>R1/R2, wherein R1 represents the surface roughness Rz of the coating layer in the rake face (2), and R2 represents the surface roughness Rz of the coating layer in the bearing surface (5).

Abstract: A indexable insert (1) of the present invention has a structure including at least a rake face (2) and a bearing surface (5), the indexable insert (1) including a substrate and a coating layer disposed on the substrate, wherein the coating layer includes one or more layers, and at least one layer of the one or more layers covers the entire surface of the substrate and satisfies the relationship F1<F2, wherein F1 represents the residual stress in the rake face (2) and F2 represents the residual stress in the bearing surface (5).

Abstract: The present invention relates to a coated cutting tool (1) including a substrate (8) and a coating (9) formed on the substrate (8), wherein the coating (9) includes a first coating (10) composed of TiCN and a second coating (ii) composed of ?-Al2O3, the first coating (10) is positioned between the substrate (8) and the second coating (11) and has tensile stress S1, the second coating (11) has compressive stress S2, and the tensile stress S1 and the compressive stress S2 are defined by the following equation (I): 400 MPa?|S2?S1|?3500 MPa??(I)

Abstract: An indexable insert (1) according to the present invention has at least a rake face (2) and a seating face (5). The indexable insert (1) includes a substrate and a coating formed on the substrate. The substrate is exposed in the seating face (5) without the coating formed thereon.

Abstract: An indexable insert (1) includes a substrate (8) and a coating layer formed on the substrate. The coating layer includes an inner layer and an outer layer. The inner layer is constituted by a layer containing at least one element selected from the group consisting of Group IVa elements, Group Va elements, and Group VIa elements in the periodic table, and Al and Si. The uppermost layer of the inner layer in contact with the outer layer is composed of a compound at least containing Ti and at least one of nitrogen and boron. The outer layer is constituted by an alumina layer or an alumina-containing layer. In a region involved in cutting, the outer layer satisfies B/A?0.9 where A ?m is the average thickness at the flank face (3) side and B ?m is the average thickness at the rake face (2) side.

Abstract: An indexable cutting insert (1) of the present invention includes at least one face (2), at least two flanks (3), at least one edge line (4), at least one corner (9), and a base layer having a different color from a use-state indicating layer. The use-state indicating layer is formed on at least one of the flanks (3) so that the use-state indicating layer is formed on the base layer over the entire surface or a part of a region A2 excluding at least one region A1 of 2 mm2 containing at least one corner (9).

Abstract: The present invention provides an indexable insert (1) which includes a body (8), a base layer disposed on the body (8), and a wear-indicating layer disposed on a part of the base layer, wherein at least one surface of the body (8) serves as a rake face (2), at least one other surface of the body serves as a flank face (3), the rake face (2) being connected to the flank face (3) with a cutting edge (4) therebetween, the base layer has a color different from that of the wear-indicating layer, and the wear-indicating layer is disposed on the rake face and on the base layer entirely or partially in a region A2 other than a region A1 that extends to a distance of 0.2 mm or more and less than 4.0 mm from the cutting edge.

Abstract: A surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) and a second surface (107) of the substrate (104) is A, a difference between the maximum and minimum thicknesses of the coating layer (108) is larger than 0.04×A. Also, a surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) of the substrate (104) is B1, and the average thickness of the coating layer (108) on a second surface (107) of the substrate (104) is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is larger than 0.04.

Abstract: The present invention relates to a coated cutting insert having a substrate, a base layer which is formed on the substrate and an indicating layer which is formed on a portion of the base layer, characterized in that in this substrate, at least one surface serves as a rake face, at least one other surface serves as a flank face, and a ridge where the rake face and the flank face cross serves as a cutting edge, the base layer has a color which is different from that of the above described indicating layer, and this indicating layer is formed on the flank face, and on the base layer over an entirety or a portion of a region excluding a region extending from the cutting edge in the vertical direction with a distance of no less than 0.2 mm and less than 3.0 mm.

Abstract: A surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) and a second surface (107) of the substrate (104) is A, a difference between the maximum and minimum thicknesses of the coating layer (108) is 0.04×A or less. Also, a surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) of the substrate (104) is B1, and the average thickness of the coating layer (108) on a second surface (107) of the substrate (104) is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is 0.04 or less.

Abstract: An indexable cutting insert (1) includes a base (8) and a coating layer, wherein the coating layer includes an inner sublayer and an outer sublayer, each of subsublayer constituting the inner sublayer is composed of a compound containing at least one element selected from the group consisting of Group IVa elements, Group Va elements, Group VIa elements in the periodic table, Al, and Si, the outer sublayer is an alumina sublayer or a sublayer containing aluminum, and in portions of the outer sublayer participating in cutting, when an average thickness on the flank face (3) side is represented by A ?m and an average thickness on the rake face (2) side is represented by B ?m, A/B?0.95.