Coated cutting tool and method
AssigneeSandvik Intellectual Property AB
InventorLars Johnson
Life of this patent
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Abstract
A coated cutting tool includes a substrate and a coating, wherein the coating has a PVD layer being a compound of the formula Ti1-xSixCaNbOc, wherein 0.10<x≤0.30, 0≤a≤0.75, 0.25≤b≤1, 0≤c≤0.2, and a+b+c=1. The PVD layer is a NaCl structure solid solution. The disclosure further relates to a method for producing the PVD layer by cathodic arc evaporation using 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.
Claims11
A coated cutting tool comprising a substrate and a coating, wherein the coating includes a PVD layer being a compound of the formula Ti1-xSixCaNbOc, wherein 0.10<x≤0.30, 0≤a≤0.75, 0.25≤b≤1, 0≤c≤0.2, and a+b+c=1, wherein the PVD layer is a NaCl structure solid solution and wherein the PVD layer has a FWHM (Full Width at Half Maximum) value for the cubic (111) peak in X-ray diffraction being ≤0.35 degrees (2theta).
A method for producing a coating on a substrate, the coating including a PVD layer deposited by cathodic arc evaporation, the PVD layer being a compound of the formula Ti1-xSixCaNbOc, wherein 0.10<x≤0.30, 0≤a≤0.75, 0.25≤b≤1, 0≤c≤0.2, and a+b+c=1, and wherein the PVD layer is a NaCl structure solid solution and wherein the PVD layer has a FWHM (Full Width at Half Maximum) value for the cubic (111) peak in X-ray diffraction being ≤0.35 degrees (2theta), the PVD layer being 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.
Dependencies are inferred from the claim text.