Evaluation of cutting force and temperature when turning hardened die steel with AMBORITE AMB90 and DBC50 tooling

摘要

The temperatures produced when hard turningtool/die steel, heat treated to above 45 HRC with polycrystallinecubic boron nitride (PCBN) tooling, cause softening of theworkpiece/chip in the cutting zone. Using AMBORITE AMB90and AMBORITE DBC50 PCBN tool materials, E-G. Ng and D.K.Aspinwall review the effect of thermal conductivity, workpiecehardness and cutting speed on chip formation and workpiece surface integrity.