Influence of cementite interparticle spacing on machinability of high carbon CR-bearing steels

The relationship between the interparticle spacing and machinability of a high carbon chrome steel in the cementite phase was clarified. The chemical composition of the cementite was determined by using themo-calc program system. Machinability of five cementite materials that have the same hardness values but different interparticle spacing are examined The results of the experiments show that the amount of tool wear and surface roughness increase as the particle diameter increases and the interparticle spacing is closet Finally, an experimental equation was proposed to estimate the tool life from the interparticle spacing of the precipitated particles.