Coated cermet cutting tool and use thereof

US7799443B2 · kind B2 · utility

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Marian Mikus · Härnösand, SE
• Kenneth Westergren · Åtvidaberg, SE
• Leif Akesson · Ayacucho, PE
• Per Mårtensson · Nacka, SE

Key dates

• Filing date: Feb 28, 2007
• Grant date: Sep 21, 2010
• Expiry date: Aug 20, 2028

Classification

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

Abstract

A cutting tool insert has a cermet body with a Co and/or Ni binder phase and a coating deposited as monolayer or as multiple and/or alternating layers of carbide, nitride or oxide. The coating has a thickness of 21-50 μm, when the inserts have a flat rake face, without or with simple chipbreakers and a Co binder phase, or has a thickness of 10-50 μm, when the inserts have a rake face land with a width of 100-300 μm with an angle of 10-25° to the rake face and a Co and/or Ni binder phase. The cermet body has more than 50 vol. % Ti-based carbonitride and less than 15 wt % and more than 6 wt % Co and/or Ni binder phase and a hardness of >1650 HV3. The disclosure also relates to the use of the coated cutting tool insert for the machining of cast iron work pieces.