Coated cutting tool and method

US11440102B2 · kind B2 · utility

Assignee

• Sandvik Intellectual Property AB · SE

Inventor

• Lars Johnson · Stockholm, SE

Key dates

• Filing date: Dec 20, 2016
• Grant date: Sep 13, 2022
• Expiry date: Oct 23, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C28/044
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

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.