Abstract: A method of making a cutting tool includes providing a first sintered cemented carbide body of a WC, a metallic binder phase and eta phase and wherein the substoichiometric carbon content in the cemented carbide is between ?0.30 to ?0.16 wt %. The first sintered cemented carbide body is subjected to a heat treatment at a temperature of between 500 to 830° C. for a time between 1 to 24 h. A cutting tool made according to the above method having an increased resistance against comb cracks is also provided.

Abstract: A method for producing a coated cutting tool for metal machining having a substrate and coating is provided. The coating includes at least one layer of (Ti,Al)N having a cubic crystal phase. The method includes the deposition of a layer of Ti1-xAlxN, 0.70?x?0.98, the Ti1-xAlxN having cubic crystal phase. The layer of Ti1-xAlxN is deposited by cathodic arc evaporation at a vacuum chamber pressure of from 7 to 15 Pa of N2 gas, using a DC bias voltage of from ?200 to ?400 V and using an arc discharge current of from 75 to 250 A. A coated cutting tool for metal machining having a coating including a (Ti,Al)N multi-layer of alternating sub-layers of at least Ti1-yAlyN and Ti1-zAlzN, 0.35?y?0.65 and 0.80?z?0.98, with only cubic phase present is also provided.

Abstract: A coated cutting tool includes a substrate and a coating, wherein the coating has a (Ti,Al)N multilayer of alternating cubic Ti1-xAlxN sub-layers, 0.60?x?0.75, and cubic+hexagonal Ti1-yAlyN sub-layers, 0.60?y?0.75. The average cubic Ti1-xAlxN sub-layer thickness is from 75 to 450 nm and the average cubic+hexagonal Ti1-yAlyN sub-layer thickness is from 50 to 300 nm. The number of each of the cubic Ti1-xAlxN sub-layers and cubic+hexagonal Ti1-yAlyN sub-layers is from 2 to 50.

Abstract: A method for producing a coating on a substrate, wherein the coating includes a PVD layer (A), deposited by cathodic arc evaporation, being a compound of the formula MexSiyAlzCaNbOc, wherein Me is one or more metals of groups 4, 5 and 6 in the IUPAC periodic table of elements. The PVD layer (A) is deposited by applying a pulsed bias voltage of from about ?40 to about ?450 V to the substrate and using a duty cycle of less than about 12% and a pulsed bias frequency of less than about 10 kHz. A coated cutting tool having a substrate and a coating is also disclosed, wherein the coating includes the PVD layer (A) with the compound of the formula MexSiyAlzCaNbOc. The PVD layer (A) is crystalline having a FWHM (Full Width at Half Maximum) value for the cubic (111) peak in X-ray diffraction of ?0.3 degrees (2theta).

Abstract: A method of making a cutting tool includes providing a first sintered cemented carbide body of a WC, a metallic binder phase and eta phase and wherein the substoichiometric carbon content in the cemented carbide is between ?0.30 to ?0.16 wt %. The first sintered cemented carbide body is subjected to a heat treatment at a temperature of between 500 to 830° C. for a time between 1 to 24 h. A cutting tool made according to the above method having an increased resistance against comb cracks is also provided.

Abstract: A method for producing a coating on a substrate, wherein the coating includes a PVD layer (A), deposited by cathodic arc evaporation, being a compound of the formula MexSiyAlzCaNbOc, wherein Me is one or more metals of groups 4, 5 and 6 in the IUPAC periodic table of elements. The PVD layer (A) is deposited by applying a pulsed bias voltage of from about ?40 to about ?450 V to the substrate and using a duty cycle of less than about 12% and a pulsed bias frequency of less than about 10 kHz. A coated cutting tool having a substrate and a coating is also disclosed, wherein the coating includes the PVD layer (A) with the compound of the formula MexSiyAlzCaNbOc. The PVD layer (A) is crystalline having a FWHM (Full Width at Half Maximum) value for the cubic (111) peak in X-ray diffraction of ?0.3 degrees (2theta).