Coated milling insert

US6250855A · kind A · utility

Assignee

• SANDVIK AB · SE

Inventors

• Jeanette Persson · Nacka, SE
• Leif Akesson · Houjie, CN
• Rickard Sundström · Stockholm, SE
• Ake Ostlund · Stuvsta-Snättringe, SE

Key dates

• Filing date: Mar 24, 2000
• Grant date: Jun 26, 2001
• Expiry date: Mar 24, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24975
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A coated cemented carbide cutting tool (indexable inserts) for the wet or dry milling, particularly at high cutting speeds, of stainless steels of different composition and microstructure, but also for the milling of non-stainless steels such as low carbon steels and low and medium alloyed steels is disclosed. The coated WC-Co based cemented carbide insert includes a specific composition range of WC+Co without any addition of cubic carbides by a low W-alloyed Co binder and by a narrow range defined average WC grainsize, and a hard and wear resistant coating including a multilayered structure of sublayers of the composition (Ti.sub.x Al.sub.1-x)N with repeated variation of the Ti/Al ratio.