Sandvik Intellectual Property Ab

Marta Saraiva

Jose Luis Garcia

Lars Johnson

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 &#x2212;0.30 to &#x2212;0.16 wt %. The first sintered cemented carbide body is subjected to a heat treatment at a temperature of between 500 to 830&#xb0; 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.

Cutting tool

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 MeSiAlCNO, 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 &#x2212;40 to about &#x2212;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 MeSiAlCNO. 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 &#x2264;0.3 degrees (2theta).

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Bandhagen, Sweden

Marta Saraiva