High speed continuous turning of hardened steel with newly developed low content PCBN

摘要

In this study, newly developed low content PCBN was used to evaluate the cutting performance in high speed turning of hardened steel. Using new PCBN and commercially available PCBN tipped inserts under the same cutting condition, cutting performance with variable cutting speed, feed rate and depth of cuts on tools were measured by observation of flank and crater wear. Its microstructures were analyzed through SEM microscope, measurement of surface roughness on workpiece was also performed.According to cutting performance results, it is shown that new PCBN shows much longer tool life in high speed continuous turning than our conventional PCBN tools, with improved wear and chipping resistance. This result on the machinability of new PCBN for hardened steel will provide effective guidelines to manufacturing engineers, also provide useful economic machining solution for high speed continuous turning for hardened steel.