CVD coated cutting tool

US11203069B2 · kind B2 · utility

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Raluca MORJAN BRENNING · Uppsala, SE
• Jan Engqvist · Uppsala, SE
• Erik Lindahl · Solna, SE
• Ernesto CORONEL · Uppsala, SE

Key dates

• Filing date: Jun 20, 2017
• Grant date: Dec 21, 2021
• Expiry date: Aug 27, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B26D2001/002
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A coated cutting tool for chip forming machining of metals includes a substrate having a surface coated with a chemical vapour deposition (CVD) coating. The substrate is coated with a coating having a layer of α-Al2O3, wherein the α-Al2O3 layer exhibits a texture coefficient TC(0 0 12)≥7.2 and wherein the ratio of I(0 0 12)/I(0 1 14)≥0.8. The coating further includes a MTCVD TiCN layer located between the substrate and the α-Al2O3 layer. The MTCVD TiCN layer exhibits a pole figure, as measured by EBSD, in a portion of the MTCVD TiCN layer parallel to the outer surface of the coating and less than 1 μm from the outer surface of the MTCVD TiCN, wherein a pole plot based on the data of the pole figure, with a bin size of 0.25° over a tilt angle range of 0°≤β≤45° from the normal of the outer surface of the coating shows a ratio of intensity within β≤15° tilt angle to the intensity within 0°≤β≤45° of ≥45%.