Coated milling insert

US6406224B1 · kind B1 · utility

Assignee

• SANDVIK AB · SE

Inventors

• Ake Ostlund · Stuvsta-Snättringe, SE
• Jeanette Persson · Nacka, SE
• Rickard Sundström · Stockholm, SE

Key dates

• Filing date: Aug 31, 2000
• Grant date: Jun 18, 2002
• Expiry date: Dec 9, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24149
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A coated milling insert particularly useful for milling in low and medium alloyed steels with or without abrasive surface zones during dry or wet conditions at high cutting speed, and milling hardened steels at high cutting speed. The insert is characterized by a WC-Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an innermost layer of TiCxNyOz with columnar grains and a top layer of TiN and an inner layer of &kgr;-Al2O3.