Superfinishing characteristics of mechanochemical superabrasive stone containing CeO₂ abrasive

Abstract

Mechanochemical superabrasive stone containing CeO₂ (i.e., cBN/CeO₂ stone), which oxidizes steel, was developed and its characteristics were evaluated through the superfinishing of bearing steels. Experiments showed that cBN/CeO₂ stone produced less subsurface damage and smaller compressive residual stress than cBN stone, and produced smooth surface with negative skewness because of the synergistic effect of the mechanical action of the cBN abrasive and chemical action of the CeO₂ abrasive. Those results indicate that cBN/CeO₂ stone can finish bearing steel surface with high wear resistance, fatigue strength, corrosion resistance, and sufficient oil dams.