Coated cutting tool

US11286559B2 · kind B2 · utility

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Erik Lindahl · Solna, SE
• Jan Engqvist · Uppsala, SE

Key dates

• Filing date: Jun 5, 2018
• Grant date: Mar 29, 2022
• Expiry date: Sep 2, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23B2228/10
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A coated cutting tool includes a substrate and a coating. The coating has an α-Al2O3-multilayer of alternating sublayers of α-Al2O3 and sublayers of TiCO, TiCNO, AlTiCO or AlTiCNO. The α-Al2O3-multilayer includes at least 5 sublayers of α-Al2O3, wherein the total thickness of the α-Al2O3-multilayer is 1-15 μm and wherein a period in the α-Al2O3-multilayer is 50-900 nm. The α-Al2O3-multilayer exhibits an XRD diffraction over a θ-2θ scan of 20°-140°, wherein the relation of the intensity of the 0 0 12 diffraction peak (peak area), I(0 0 12), to the intensities of the 1 1 3 diffraction peak (peak area), I(1 1 3), the 1 1 6 diffraction peak (peak area), I(1 1 6), and the 0 2 4 diffraction peak (peak area), I(0 2 4), is I(0 0 12)/I(1 1 3)>1, I(0 0 12)/I(1 1 6)>1 and I(0 0 12)/I(0 2 4)>1.