A cutting machining tool for metal-containing materials has a base material composed of cemented hard material with hard material particles embedded in a ductile metallic binder. The metallic binder is a CoRu alloy and the hard material particles are formed at least predominantly by tungsten carbide, having an average grain size of the tungsten carbide of 0.1-1.2 m. The cemented hard material has a (Co+Ru) content of 5-17% by weight of the cemented hard material, a Ru content of 6 16% by weight of the (Co+Ru) content, a Cr content of 2-7.5% by weight of the (Co+Ru) content, a content of Ti, Ta and/or Nb of in each case <0.2% by weight of the cemented hard material and a V content of <0.3% by weight of the cemented hard material.

A method for manufacturing a cemented carbide body includes the steps of forming a first part of a first powder composition comprising a first carbide and a first binder phase, sintering the first part to full density in a first sintering operation, forming a second part of a second powder composition comprising a second carbide and a second binder phase, sintering the second part to full density in a second sintering operation, bringing a first surface of the first part and a second surface of the second part in contact, and joining the first and second surface in a heat treatment operation.

The present invention provides a cutting insert in which suitable honing is formed on a cutting edge. The cutting insert is provided with: two end surfaces opposing each other; a peripheral side surface extending between the two end surfaces; and a cutting edge formed on an intersecting ridge between at least one of the two end surfaces and the peripheral side surface. The cutting edge at least includes a major cutting edge and an inner cutting edge. Honing is provided on the major cutting edge and the inner cutting edge. A width of second honing of the inner cutting edge is narrower than a width of first honing of the major cutting edge, as viewed from a side of the end surfaces.

A cutting machining tool for metal-containing materials has a base material composed of cemented hard material with hard material particles embedded in a ductile metallic binder. The metallic binder is a CoRu alloy and the hard material particles are formed at least predominantly by tungsten carbide, having an average grain size of the tungsten carbide of 0.1-1.2 m. The cemented hard material has a Co+Ru content of 5-17% by weight of the cemented hard material, a Ru content of 6-16% by weight of the Co+Ru content, a Mo content in the range 0.1-3.0% by weight of the cemented hard material, a content of Ti, Ta and/or Nb of in each case <0.2% by weight of the cemented hard material, and a V content of <0.3% by weight of the cemented hard material.

The present disclosure relates to a cutting tool of a cemented carbide substrate including WC and a binder phase having one or more of Co, Fe and Ni, wherein the cemented carbide also includes a finely dispersed eta phase of Me12C and/or Me6C carbides, where Me is one or more metals selected from W, Mo and the binder phase metals, wherein the substoichiometric carbon content in the cemented carbide is between 0.30 to 0.16 wt %. The disclosed cutting tool will achieve an improved resistance against comb cracks.

A cutting tool according to one aspect of the present disclosure includes an attaching portion, a cutting portion having a core portion and a surface portion, and a joint portion. The attaching portion includes a hard component and a hard material. The hard component is at least one selected from the group consisting of TiC, TiCN, W, WC, Al.sub.2O.sub.3, and a combination of at least one of CBN and diamond and at least one of W and WC. The hard material includes one or two or more types of iron group elements, and has a Young's modulus of not more than 350 GPa. The core portion includes a cemented carbide material. The surface portion includes PCD or CBN. The cutting portion has a chamfer portion. The surface portion includes a groove, a flank face, and a cutting edge. The cutting edge extends toward the attaching portion.

A corner radius end mill includes a tooth adjacent a helically extending flute. The tooth includes axial and radial relief surfaces connected by a corner relief surface, as well as rake surface having a rake ridge. The rake ridge is continuously curved from a bisector line until at least an axial location rearward of the corner relief surface.

A cutting tool based on an embodiment of the present invention is provided with a cylindrical main body section which is made of a cobalt-containing cemented carbide alloy and is rotatable about the central axis thereof, a cutting edge which is provided at at least one of the tip and the periphery of the main body section, a chip discharge groove which extends from the cutting edge toward the rear end of the main body section, and a coating layer which is made of diamond and covers the cutting edge, wherein the cobalt content of the surface of the main body section at the part coated with the coating layer is less than the cobalt content of the surface of the main body section at parts other than the part coated with the coating layer.

A coated cutting tool and a hard and wear resistant coating for a body include at least one metal based nitride layer. The layer is (ZrxCrl-x-y-zAlyMez)Na with 0.55<x<0.85, 0.05<y<0.45, 0z<0.20, 0.95<a<1.10, and Me is one or more of the elements: Y, Ti, V, Nb, Ta, Mo, W, Mn or Si. The layer can have a thickness between 0.5 m and 15 m and be comprisied of a single cubic phase or a single hexagonal phase or a mixture thereof. In an exemplary embodiment, the layer is a cubic phase of a sodium chloride structure. The layer can be deposited using cathodic arc evaporation and is useful for metal cutting applications generating high temperatures.

A rod, a cutting tool and a method for manufacturing a cutting tool are disclosed. In an embodiment, the rod may include a cemented carbide member containing WC and Co. The cemented carbide member may be elongated and include a first end portion and a second end portion in a longitudinal direction. The first end portion may have a Co content Co.sub.AC smaller than a Co content Co.sub.BC of the second end portion. The cemented carbide member may include a first portion on a side of the first end portion and a second portion on a side of the second end portion. The first portion may have a gradient S.sub.1 representing a change in a Co content per milliliter. The second portion may have a gradient S.sub.2 representing a change in a Co content per milliliter. The gradient S.sub.1 may be greater than the gradient S.sub.2.