Cutting tool insert

摘要

The present invention relates to a cutting tool insert preferably for machining of hardened steel, hot and cold working tool steel, die steel, case hardened steel, high speed steel and ductile grey cast iron and composed of a composite comprising from about 30 to less than about 60 vol-% of a cBN-phase and a binder phase comprising a titaniumcarbonitride phase and a TiB₂ phase. According to the invention, in the XRD pattern from the composite using CuKalpha-radiation the peak height ratio of the strongest TiB₂ peak and the strongest cBN peak is less than about 0.02.