Cutting element used for cutting steel comprises tungsten carbide, solid solutions of tungsten carbide and carbides, nitrides and carbonitrides of Group IVA, VA and VIA metals, and an iron group metal

摘要

Cutting element comprises tungsten carbide, two or more solid solutions of tungsten carbide and compounds selected from carbides, nitrides and carbonitrides of Group IVA, VA and VIA metals, and at least one metal of the iron group. At least one of the solid solutions is a solution having a high Nb or Zr content. Preferred Features: The element has a coating made of MC, MN, MCN, TiAlN, ZrO2 or Al2O3 (where, M = a Group IVA, VA or VIA metal, and MC, MN and MCN = the carbide, nitride and/or carbonitride of the metal).