Temperature measurement when high speed machining hardened mould/die steel

When turning and face milling hardened (>30 HRC) mould/die steels, it is necessary to use conventional ceramic or polycrystalline cubic boron nitride (PCBN) tool materials. The use of high speed steel and cemented tungsten carbide (WC) tooling for this application is precluded due to their relatively low hot hardness values. In recent years, however, the mould and die industry has begun to utilise solid WC ball nose end mills for the high speed …