A coated cutting tool includes a body and a hard and wear resistant PVD coating on the body, wherein the body is made from a cemented carbide, cermet, ceramics, polycrystalline diamond or polycrystalline cubic boron nitride based materials. Th coating includes a first (Ti,Al)-based nitride sub-coating and a second (Ti,Al)-based nitride sub-coating. The first (Ti,Al)-based nitride sub-coating can be a single layer, and the second (Ti,Al)-based nitride sub-coating can be a laminated structure, wherein the first (Ti,Al)-based nitride sub-coating includes a (Ti.sub.1-xAl.sub.x)N.sub.z-layer where 0.1<x<0.4, 0.6<z<1.2, and wherein the second (Ti,Al)-based nitride sub-coating includes a (Ti.sub.1-x1-y1Al.sub.x1Cr.sub.y1)N.sub.z1 layer where 0.5<x1<0.75, 0.05<y1<0.2, 0.6<z1<1.2.

A hard film-coated cutting tool comprises: a hard base material and a hard film formed on the hard base material, wherein: assuming that a colorimetric diffusion reflectance value is L.sub.SCER and a total reflectance value is L.sub.SCIR, the relationship of 0.65L.sub.SCER/L.sub.SCIR0.85 is satisfied, and when surface roughness is measured on the rake surface of the hard film within the range of 100 m from the edge, an arithmetic average height S.sub.aR is within the range of 0.2 mS.sub.aR0.5 m; and assuming that, at a flank surface of the hard film, a colorimetric diffusion reflectance value is L.sub.SCEF and a total reflectance value is L.sub.SCIF, the relationship of L.sub.SCEF/L.sub.SCIF0.9 is satisfied, and when surface roughness is measured on the flank surface of the hard film within the range of 100 m from the edge, an arithmetic average height S.sub.aF is within the range of 0.15 mS.sub.aF0.4 m.

A coated cutting tool including a substrate and a coating layer formed on the substrate, wherein the coating layer has a first alternately laminated structure in which two or more A layers and two or more B layers are alternately formed, the A layer contains (Al.sub.aCr.sub.bTi.sub.1-a-b)N, the B layer contains (Al.sub.cTi.sub.1-c-dB.sub.d)N, the average thickness of the first alternately laminated structure is 0.50 m or more and 10.00 m or less, and the average thickness per layer of each of the A layer and the B layer in the first alternately laminated structure is 2 nm or more and 300 nm or less.

A coated tool according to the present disclosure includes a base body made of WC-based cemented carbide containing WC particles as a hard phase component and Co as a main component of a binding phase, a coating layer located on the base body, and an intermediate layer located between the base body and the coating layer. The intermediate layer contains Ti, and has an average layer thickness of 1 nm or more and 15 nm or less. The coating layer includes a first coating layer in contact with the intermediate layer. The first coating layer includes at least one element selected from the group consisting of Al, Group 5 elements, Group 6 elements, and Group 4 elements except for Ti, at least one element selected from the group consisting of C and N, Si, and Cr.

A tool for machining in which defective adhesion of a coating film at an interface of a layer containing titanium and an alumina layer is prevented. A method for producing a tool for machining is provided in which a coating film of a plurality of layers is formed on a surface of a base material by physical vapor deposition (PVD), the method including: a first layer formation step of forming a first layer containing a nitride or carbide of titanium on the surface of the base material; a first barrier layer formation step of forming a barrier layer that covers a surface of the first layer; and a second layer formation step of forming a second layer containing aluminum oxide on a surface of the barrier layer.

In order to achieve a long service life for a machining tool, in particular for a solid carbide drill, it is provided with a special wear protection coating. In a first method step, in order to form this coating, a first layer made of a first material is applied in the region of a cutting edge and in the adjoining surface regions, and specifically, a flank face and a rake face. In a second step, the applied first material of the first layer is selectively removed at least partially, and preferably completely, only in the region of the cutting edge. Finally, in a third method step, a second layer made of a second wear-resistant material is applied both to the cutting edge and to the face regions. In this way, a coating having a high overall thickness in the face regions is made possible, without the risk of cracking.

A coating layer of a coated tool according to the present disclosure contains a cubic crystal composed of at least one element selected from Group 4a, 5a and 6a elements in the periodic table, Al and Si and at least one element selected from C and N. The coating layer has a maximum value I.sub.2max of an X-ray intensity in a measurement range of 0 or greater and 900 or less on an X-ray intensity distribution of a positive pole figure related to a (200) plane of the cubic crystal. In the coating layer, a difference (I.sub.2maxI.sub.23min) between a minimum value (I.sub.23min) of the X-ray intensity in a third region and the I.sub.2max is smaller than a difference (I.sub.2maxI.sub.24min) between a minimum value (I.sub.24min) of the X-ray intensity in a fourth region and the I.sub.2max, and the I.sub.23min is 95% or greater of the I.sub.2max.

A coated cutting tool insert includes a substrate of cemented carbide, cermet, ceramics, steel or cubic boron nitride having deposited thereon a coating having a total thickness of 60 m, including one or more layers having a wear resistant layer of -Al.sub.2O.sub.3 of a thickness of 1 to 45 m deposited by chemical vapour deposition (CVD). The -Al.sub.2O.sub.3 layer includes at least two portions, a first thickness portion and a second thickness portion immediately on top of the first thickness portion. The first thickness portion has an essentially columnar -Al.sub.2O.sub.3 grain structure, and at a transition from the first thickness portion to the second thickness portion the grain boundaries of at least 1 out of 25 neighboring grains of the -Al.sub.2O.sub.3 grains undergo a directional change into a direction that is essentially perpendicular, 9045 degrees, to the grain boundaries in the first thickness portion.

A coated tool includes a base body and a coating layer located on a surface of the base body. The coating layer contains a cubic crystal composed of at least one element selected from Group 4a, 5a and 6a elements under the periodic table, Al, Si, B, Y, and Mn, and at least one element selected from C and N. In a measurement range from 0 to 90 in a distribution of X-ray intensity on an axis in a positive pole figure for a (111) plane of the coating layer, a difference between a maximum value and a minimum value of the X-ray intensity in a range where an angle of the axis is from 30 to 90 is 10% or less of the maximum value.

The present disclosure relates to a cutting tool of a cemented carbide or a cermet substrate. The cutting tool typically has a rake face, a flank face and a cutting edge extending therebetween. A Vickers hardness as measured on the rake face is at least 25 HV 100 higher than a Vickers hardness as measured in a bulk area of the tool, and wherein the hardness is an average of 4 parallel measurements.