Cutting body used for cutting steel workpieces comprises base body having a coating made from titanium boron nitride having a specified boron content

摘要

Cutting body comprises base body having a coating made from TiBN having a B content of at least 6 wt.%. An Independent claim is also included for a process for producing a hard material layer for a cutting body comprising placing a body to be coated in a reactor at a process pressure of 60-950 mbar and a temperature of 700-950 deg C. The process atmosphere contains precursors for titanium and boron and nitrogen and/or nitrogen compounds. Preferred Features: The TiBN layer is a mixed phase layer made from a TiN phase and a TiB2 phase. The TiN phase is cubic and the TiB2 phase is hexagonal. The TiBN layer is applied using a CVD process.