Abstract: Provided is a surface-coated cutting tool including a complex carbonitride layer on the tool body, wherein a ratio of crystal grains having a NaCl type face-centered cubic structure is 80 area % or more, xavg and yavg satisfy 0.60?xavg?0.90 and 0.000?yavg?0.050, respectively, a composition of the Ti—Al complex carbonitride layer being represented by (Ti1-xAlx)(CyN1-y), the xavg being an average of x that is an Al content in a total content of Al and Ti, and the yavg being an average of y that is a C content in a total content of C and N, the crystal grains having the NaCl type face-centered cubic structure include crystal grains in which the x repeatedly increases and decreases, the crystal grains include 10 to 40 area % of crystal grains G1 having an average distance of 40 to 160 nm and crystal grains Gs having an average distance of 1 to 7 nm.

Abstract: A surface-coated cutting tool includes a tool body and a hard coating layer, where one TiAlCN layer ? (1) containing 70 area % or more of a wurtzite type hexagonal structure on a tool surface side (S) and one TiAlCN layer ? (2) containing 70 area % or more of a NaCl type face-centered cubic structure on the tool body side (B), when a composition of the TiAlCN layer ? (1) is represented by (Ti(1-x?)Alx?)(Cy?N(1-y?)) satisfying 0.70?x??0.95 and 0.000?y??0.010, when a composition of the TiAlCN layer ? (2) is represented by (Ti(1-x?)Alx?)(Cy?N(1-y?)) satisfying 0.65?x??0.95 and 0.000?y??0.010, and when average layer thicknesses of the TiAlCN layer ? (1) and the TiAlCN layer ? (2) are defined as L? and L? satisfying 0.5 ?m?L??10.0 ?m and 1.0 ?m?L??20.0 ?m.

Abstract: A surface-coated cutting tool has a hard coating layer including an upper layer ?, an adhesion layer ?, and a lower layer ?. The upper layer ? is formed of an ?-Al2O3 layer formed under low temperature conditions. The adhesion layer ? includes a TiCN layer having a thickness of 0.5 ?m or more in an outermost layer and contains 0.5 to 3 ?m to a maximum depth of 0.5 ?m toward the inside in a layer thickness direction of the TiCN layer from the interface between the TiCN layer and the upper layer ?. The lower layer ? is formed of (Ti1-XAlX)(CYN1-Y) of a single phase of a NaCl type face-centered cubic structure, in which an average content ratio Xavg of Al and an average content ratio Yavg of C in this composition formula satisfy 0.60?Xavg?0.95 and 0?Yavg?0.005.

Abstract: A surface coated cutting tool comprises a tool body. A TiAlCN layer having an average layer thickness of 2.0 to 20.0 ?m and represented by (Ti(1-x)Alx)(CyN(1-y)) is provided on the surface of the tool body and has an average content ratio xavg of Al and an average content ratio yavg of C that satisfy 0.60?xavg?0.95 and 0.00?yavg?0.05, an area ratio occupied by crystal grains having an NaCl-type face-centered cubic structure that satisfies 90 area % or more, and crystal grains satisfying 0.01 ?m<d?0.20 ?m in 10 to 40 area %. An average maximum length in a direction parallel to the surface of the tool body in each region in which the crystal grains having d of 0.01 ?m<d?0.20 ?m are adjacent and connected to each other in the upper layer side region is 5.0 ?m or less.

Abstract: A surface-coated cutting tool has a hard coating layer including an upper layer ?, an adhesion layer ?, and a lower layer ?. The upper layer ? is formed of an ?-Al2O3 layer formed under low temperature conditions. The adhesion layer ? includes a TiCN layer having a thickness of 0.5 ?m or more in an outermost layer and contains 0.5 to 3 ?m to a maximum depth of 0.5 ?m toward the inside in a layer thickness direction of the TiCN layer from the interface between the TiCN layer and the upper layer ?. The lower layer ? is formed of (Ti1-XAlX)(CYN1-Y) of a single phase of a NaCl type face-centered cubic structure, in which an average content ratio Xavg of Al and an average content ratio Yavg of C in this composition formula satisfy 0.60?Xavg?0.95 and 0?Yavg?0.005.

Abstract: A surface-coated cutting tool including at least a TiAlCN layer, in which the layer is expressed by a composition formula: (Ti1-XAlX)(CYN1-Y), an average content ratio X of Al and an average content ratio Y of C (here, X and Y are atomic ratios) satisfy 0.60?X?0.95 and 0?Y?0.005, respectively, an average content ratio Z of Cl in the total amount of atoms configuring the TiAlCN phase (here, Z is an atomic ratio) satisfies 0.0001?Z?0.004, plane spacings d(111) and d(200) are respectively calculated from X-ray diffraction spectra of (111) plane and (200) plane of crystal grains having a NaCl type face-centered cubic structure in the TiAlCN layer measured by using an X-ray diffraction device, and an absolute value ?A=|A(111)?A(200)| defined as A(111)=31/2d(111) and A(200)=2d(200) satisfies 0.007 ???A?0.05.

Abstract: In a hard coating layer that contains at least any of a layer of a complex nitride or a complex carbonitride (composition formula: (Ti1-xAlx)(CyN1-y)) of chemically-vapor-deposited Ti and Al, a layer of a complex nitride or a complex carbonitride (composition formula: (Ti1-?-?Al?Mr?)(C?Ni1-?)) of Ti, Al, and Me, and a layer of a complex nitride or a complex carbonitride (composition formula: (Cr1-pAlp)(CqN1-q) of Cr and Al in a surface-coated cutting tool, some crystal grains that form the layer of a complex nitride or a complex carbonitride have cubic structures, and a predetermined average crystal grain misorientation and inclined angle frequency distribution are present in the crystal grains that have cubic structures.

Abstract: In this surface-coated cutting tool, a hard coating layer includes at least a layer of a complex nitride or complex carbonitride expressed by a composition formula: (Cr1-xAlx)(CyN1-y) or a layer of a complex nitride or complex carbonitride expressed by a composition formula: (Ti1-?-?Al?Me?)(C?N1-?), crystal grains configuring the layer of a complex nitride or complex carbonitride having an NaCl type face-centered cubic structure are present, and predetermined average crystal grain misorientation and inclined angle frequency distribution are present in the crystal grains having an NaCl type face-centered cubic structure.

Abstract: A surface-coated cutting tool including at least a TiAlCN layer, in which the layer is expressed by a composition formula: (Ti1-XAlX)(CYN1-Y), an average content ratio X of Al and an average content ratio Y of C (here, X and Y are atomic ratios) satisfy 0.60?X?0.95 and 0?Y?0.005, respectively, an average content ratio Z of Cl in the total amount of atoms configuring the TiAlCN phase (here, Z is an atomic ratio) satisfies 0.0001?Z?0.004, plane spacings d(111) and d(200) are respectively calculated from X-ray diffraction spectra of (111) plane and (200) plane of crystal grains having a NaCl type face-centered cubic structure in the TiAlCN layer measured by using an X-ray diffraction device, and an absolute value ?A=|A(111)?A(200)| defined as A(111)=31/2d(111) and A(200)=2d(200) satisfies 0.007 ???A?0.05.

Abstract: In this surface-coated cutting tool, a hard coating layer includes at least a layer of a complex nitride or complex carbonitride expressed by a composition formula: (Cr1-xAlx)(CyN1-y) or a layer of a complex nitride or complex carbonitride expressed by a composition formula: (Ti1-?-?Al?Me?)(C?N1-?), crystal grains configuring the layer of a complex nitride or complex carbonitride having an NaCl type face-centered cubic structure are present, and predetermined average crystal grain misorientation and inclined angle frequency distribution are present in the crystal grains having an NaCl type face-centered cubic structure.

Abstract: In a hard coating layer that contains at least any of a layer of a complex nitride or a complex carbonitride (composition formula: (Ti1-xAlx)(CyN1-y)) of chemically-vapor-deposited Ti and Al, a layer of a complex nitride or a complex carbonitride (composition formula: (Ti1-?-?Al?Mr?)(C?Ni1-?)) of Ti, Al, and Me, and a layer of a complex nitride or a complex carbonitride (composition formula: (Cr1-pAlp)(CqN1-q) of Cr and Al in a surface-coated cutting tool, some crystal grains that form the layer of a complex nitride or a complex carbonitride have cubic structures, and a predetermined average crystal grain misorientation and inclined angle frequency distribution are present in the crystal grains that have cubic structures.

Abstract: A coated tool has a hard coating layer including a layer of a complex nitride or complex carbonitride expressed by (Ti1-xAlx)(CyN1-y). A periodic concentration variation is present in crystal grains of a complex nitride or complex carbonitride having a NaCl type face-centered cubic structure in the layer. The periodic concentration variation direction includes a direction at 30 degrees or less with respect to a surface of a tool body. An area percentage of a periodic concentration variation of Ti and Al is 40% or more. The concentration variation period is 1 to 10 nm. A difference between an average of local maximums and an average of local minimums of a periodically varying amount x of Al is 0.01 to 0.1. Fine crystal grains having a hexagonal structure with an average grain size of 0.01 to 0.3 ?m are present at grain boundaries in 5% or less of the area.