Cemented carbide insert

US6344264B1 · kind B1 · utility

Assignee

• SANDVIK AB · SE

Inventors

• Anders Lenander · Tyresö, SE
• Mikael Lindholm · Kalmar, SE

Key dates

• Filing date: Apr 7, 2000
• Grant date: Feb 5, 2002
• Expiry date: Apr 7, 2020

Classification

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

Abstract

The present invention relates to a cutting tool insert and its methods of manufacture for machining of steel comprising a cemented carbide body and a coatings. The cemented carbide body includes WC, 5-12 wt-% Co and 3-11 wt-% of cubic carbides of metals Ta and Ti. The amount of Nb is below 0.1 wt-% and the ratio Ta/Ti is 1.0-4.0. The Co-binder phase is highly alloyed with W with a CW-ratio of 0.75-0.95 and, finally, the cemented carbide body has a binder phase enriched and essentially gamma phase free surface zone of a thickness of 5-50 &mgr;m.