Coated cutting insert for rough turning

US7135221B2 · kind B2 · utility

Assignee

• Seco Tools AB · SE

Inventors

• Sakari Ruppi · Fagersta, SE
• Silvia Dahlund · Växjö, SE
• Jenni Zackrisson · Fagersta, SE

Key dates

• Filing date: Oct 27, 2004
• Grant date: Nov 14, 2006
• Expiry date: Jan 22, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/30
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A cutting tool insert with a cemented carbide and a coating. The cemented carbide substrate includes WC, 7 to 12 wt-% Co, 5 to 11 wt-% cubic carbides of metals from the groups IVb, Vb and VIb with a binder phase that is highly alloyed with cobalt. The tungsten carbide phase has a mean intercept length of 0.7 to 1.4 μm. The coating includes at least one 2 to 12 μm thick α-Al2O3 layer composed of columnar grains with texture coefficients: TC(012)>2.2 and TC(024)>0.6×TC(012).