Abstract: Object: To provide a cBN sintered compact having high wear resistance, and a cutting tool having high wear resistance that uses the cBN sintered compact. Solution: A cBN sintered compact (1) including 50 vol. % or greater of cBN particles (2); and a binder phase (4) including Co; wherein in the binder phase (4), intra-phase particles (8) including CoaWb (where 0?a?0.95 and 0.05?b?1) are present. Additionally, a cutting insert (20) or similar cutting tool either includes a cBN tip (25) made from the cBN sintered compact (1) or is entirely made from the cBN sintered compact (1). The cBN sintered compact (1) and the cutting insert (20) or similar cutting tool have increased wear resistance.

Abstract: Object: To provide a cBN sintered compact having high wear resistance, and a cutting tool having high wear resistance that uses the cBN sintered compact. Solution: A cBN sintered compact (1) including 50 vol. % or greater of cBN particles (2); and a binder phase (4) including Co; wherein in the binder phase (4), intra-phase particles (8) including CoaWb (where 0?a?0.95 and 0.05?b?1) are present. Additionally, a cutting insert (20) or similar cutting tool either includes a cBN tip (25) made from the cBN sintered compact (1) or is entirely made from the cBN sintered compact (1). The cBN sintered compact (1) and the cutting insert (20) or similar cutting tool have increased wear resistance.

Abstract: A cutting tool is disclosed. The cutting tool comprises a substrate and a coating layer on the substrate. The coating layer consists of nitride or carbonitride containing Ti and Al, and has a thickness of 3 to 9 ?m on a flank face. A first intensity ratio I(400)/I(311) of the coating layer on an outer surface is larger than the first intensity ratio of the coating layer on the substrate side.

Abstract: A surface coated tool comprises a substrate and a coating layer superimposed on the surface of the substrate and containing Ti and W in the form of nitride or carbonitride. The coating layer comprises a matrix and dispersed particles dispersed into the matrix. The W content of the dispersed particles is larger than the W content of the matrix, and a difference in the W content between the matrix and the dispersed particles is larger than a difference in other ingredient content. A cutting tool consisting of the surface coated tool and having a cutting edge is prepared, and the cutting edge of the cutting tool is brought into contact with a cutting object, and the cutting object is cut by the cutting tool.

Abstract: A cutting tool is disclosed. The cutting tool comprises a substrate and a coating layer on the substrate. The coating layer consists of nitride or carbonitride containing Ti and Al, and has a thickness of 3 to 9 ?m on a flank face. A first intensity ratio I(400)/I(311) of the coating layer on an outer surface is larger than the first intensity ratio of the coating layer on the substrate side.

Abstract: A surface coated tool comprises a substrate and a coating layer superimposed on the surface of the substrate and containing Ti and W in the form of nitride or carbonitride. The coating layer comprises a matrix and dispersed particles dispersed into the matrix. The W content of the dispersed particles is larger than the W content of the matrix, and a difference in the W content between the matrix and the dispersed particles is larger than a difference in other ingredient content. A cutting tool consisting of the surface coated tool and having a cutting edge is prepared, and the cutting edge of the cutting tool is brought into contact with a cutting object, and the cutting object is cut by the cutting tool.

Abstract: A surface coated tool including a substrate, and stacked layers composed of two coating layers represented by the following general formula (1) on the substrate is provided. A first coating layer to be coated on the surface of the substrate, which has a thickness of 0.1 to 1 ?m, is composed of a granular crystal having a mean crystal diameter of 0.01 to 0.1 ?m. A second coating layer to be coated on the surface of the first coating layer, which has a thickness of 0.5 to 5 ?m, is composed of columnar crystal grown in a direction perpendicular to the substrate, and the columnar crystal has a mean crystal width of 0.05 to 0.3 ?m in a direction parallel to the substrate while a mean crystal width thereof is larger than the mean crystal diameter of the first coating layer.