Abstract: A surface-coated cutting tool has excellent welding resistance and fracturing resistance and comprises a hard coating layer, including at least a lower layer and an upper layer, formed on a surface of a cutting tool body. The lower layer is formed of one layer or two or more layers of a TiC layer, a TiN layer, a TiCN layer, a TiCO layer, and a TiCNO layer. The upper layer is found as an Al2O3 layer on a surface of the lower layer. On at least an outermost surface of the upper layer of a rake face, a zirconium oxide layer is formed in an area ratio of 30% to 70%. The Al2O3 layer on the rake face has a tensile residual stress of 10 to 200 MPa and a surface roughness Ra is 0.25 ?m or less.

Abstract: A method for manufacturing a surface-coated cutting insert that includes an insert body having a substrate of tungsten carbide-based cemented carbide, titanium carbonitride-based cermet or ceramics, a base layer, an intermediate layer and an outermost layer. The base layer and the outermost layer are made of a single layer or two or more layers formed of carbides, nitrides, oxides, or borides of one selected from the group consisting of Group IVa metals, Group Va metals, Group VIa metals, aluminum and silicon, or complex compounds thereof, and the intermediate layer is formed of primarily Al2O3. The outermost layer is removed on part of the insert body surface including the flank face and a flank face-side cutting edge portion of the intersecting edge line region, with the outermost layer being left on part of the rake face inside a boundary with the intersecting edge line region.

Abstract: A surface-coated cutting insert includes an insert body having a substrate of tungsten carbide-based cemented carbide, titanium carbonitride-based cermet or ceramics, a base layer, an intermediate layer and an outermost layer, the base layer and the outermost layer are made of a single layer or two or more layers formed of carbides, nitrides, oxides, or borides of one selected from the group consisting of Group IVa metals, Group Va metals, Group VIa metals, aluminum and silicon, or complex compounds thereof, and the intermediate layer is formed of primarily Al2O3, the outermost layer is removed on part of the insert body surface including the flank face and a flank face-side cutting edge portion of the intersecting edge line region, with the outermost layer being left on part of the rake face inside a boundary with the intersecting edge line region.

Abstract: A method for manufacturing a surface-coated cutting insert that includes an insert body having a substrate of tungsten carbide-based cemented carbide, titanium carbonitride-based cermet or ceramics, a base layer, an intermediate layer and an outermost layer. The base layer and the outermost layer are made of a single layer or two or more layers formed of carbides, nitrides, oxides, or borides of one selected from the group consisting of Group IVa metals, Group Va metals, Group VIa metals, aluminum and silicon, or complex compounds thereof, and the intermediate layer is formed of primarily Al2O3. The outermost layer is removed on part of the insert body surface including the flank face and a flank face-side cutting edge portion of the intersecting edge line region, with the outermost layer being left on part of the rake face inside a boundary with the intersecting edge line region.

Abstract: This method for manufacturing a surface-coated cutting insert includes clamping and holding a surface-coated cutting insert with a pair of rotary shafts which are rotatable around an axis, and jetting an abrasive fluid to the surface of the surface-coated cutting insert using at least one blasting gun while rotating the surface-coated cutting insert, thereby, conducting wet blasting.

Abstract: This method for manufacturing a surface-coated cutting insert includes clamping and holding a surface-coated cutting insert with a pair of rotary shafts which are rotatable around an axis, and jetting an abrasive fluid to the surface of the surface-coated cutting insert using at least one blasting gun while rotating the surface-coated cutting insert, thereby, conducting wet blasting.

Abstract: This method for manufacturing a surface-coated cutting insert includes clamping and holding a surface-coated cutting insert with a pair of rotary shafts which are rotatable around an axis, and jetting an abrasive fluid to the surface of the surface-coated cutting insert using at least one blasting gun while rotating the surface-coated cutting insert, thereby, conducting wet blasting.

Abstract: This method for manufacturing a surface-coated cutting insert includes clamping and holding a surface-coated cutting insert with a pair of rotary shafts which are rotatable around an axis, and jetting an abrasive fluid to the surface of the surface-coated cutting insert using at least one blasting gun while rotating the surface-coated cutting insert, thereby, conducting wet blasting.

Abstract: A surface-coated cutting insert includes an insert body having a substrate of tungsten carbide-based cemented carbide, titanium carbonitride-based cermet or ceramics, a base layer, an intermediate layer and an outermost layer, the base layer and the outermost layer are made of a single layer or two or more layers formed of carbides, nitrides, oxides, or borides of one selected from the group consisting of Group IVa metals, Group Va metals, Group VIa metals, aluminum and silicon, or complex compounds thereof, and the intermediate layer is formed of primarily Al2O3, the outermost layer is removed on part of the insert body surface including the flank face and a flank face-side cutting edge portion of the intersecting edge line region, with the outermost layer being left on part of the rake face inside a boundary with the intersecting edge line region.