Oxide coated cutting insert

US8409732B2 · kind B2 · utility

Assignee

• Seco Tools AB · SE

Inventors

• Mats Johansson · Linköping, SE
• Tommy Larsson · Ludvika, SE

Key dates

• Filing date: Mar 3, 2009
• Grant date: Apr 2, 2013
• Expiry date: Nov 19, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/265
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A cutting tool insert includes a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel and a hard and wear resistant coating, including one or several layers, at least one of which is an (Al,Cr)2O3 layer. The coating, with a total thickness of 2-20 μm includes one or several layers, at least one of which is an (Al,Cr)2O3 layer with a thickness of 1-5 μm having a corundum phase crystalline structure and a composition (Al1-yCry)2O3 with 0.5≦y≦0.7. The (Al,Cr)2O3 layer has a fiber texture with rotational symmetry in the direction of the coated surface normal with an inclination angle, φ, of the basal planes relative to the coated surface normal or the inclination angle, φ, for the highest peak in the pole plot with 20°<φ<55°.