Coated cemented carbide insert

US7153562B2 · kind B2 · utility

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Markus Rodmar · Vallentuna, SE
• Mikael Lindholm · Kalmar, SE
• Anders Jonsson · Bromma, SE
• Gunilla Andersson · Solna, SE
• Anders Nordgren · Nacka, SE
• Mikael Lagerquist · Upplands Väsby, SE

Key dates

• Filing date: Jan 21, 2004
• Grant date: Dec 26, 2006
• Expiry date: Jun 26, 2024

Classification

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

Abstract

The present invention relates to a cutting tool insert particularly for turning of steel comprising a cemented carbide body, a coating with a post treatment witha first, innermost layer system of one or several layers of TiCxNyOz with x+y+z≦1 with a total thickness of 0.7–4.5 μma second multilayer system consisting of a totally 5–31 alternating Al2O3 and TiCxNyOz (x+y+z≦1), preferably κ-Al2O3 and TiN, the Al2O3-layers having an individual layer thickness of <0.5 μm and the TiCxNyOz-layers 0.01–0.2 μm with a total thickness of the multilayer of 1.0–4.0 μm. The multilayer is exposed along the edge line and into the rake and flank face, at least 0.02 mm, from the edge line on the rake face, preferably the contact length of the chip at most 0.9 mm, and 0.02–0.20 mm on the flank face.