Thin wear resistant coating

US8507108B2 · kind B2 · utility

Inventors

• Tommy Larsson · Ludvika, SE
• Lennart Karlsson · Alingsås, SE

Key dates

• Filing date: May 8, 2006
• Grant date: Aug 13, 2013
• Expiry date: Jan 25, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C28/048
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention relates to a cutting tool insert, solid end mill, or drill, comprising a substrate and a coating. The coating is composed of one or more layers of refractory compounds of which at least one layer comprises a h-Me1Me2X phase, where Me1 is one or several of the elements V, Cr, Nb, and Ta and Me2 is one or several of the elements Ti, Zr, Hf, Al, and Si and X is one or several of the elements N, C, O or B. The ratio R=(at-% X)/(at-% Me1+at-% Me2) of the h-MelMe2X phase is between 0.5 and 1.0, preferably between 0.8 and 1.0 and X contains less than 30 at-% of O+B. This invention is particularly useful in metal cutting applications where the chip thickness is small and the work material is hard e.g. copy milling using solid end mills, insert milling cutters or drilling of hardened steels.