Characteristics of Graphite-Impregnated Resin-bonded Cubic Boron Nitride Composites

摘要

The wear behaviors of micro graphite particles impregnating a cubic boron nitride (CBN) abrasive matrix using resin bonding was presented. CBN composite specimens containing 0.1, 1, and 5 wt% graphite and 50, 75, and 100 CBN concentrations were prepared by compression molding. Three dressing materials-copper, SiC, and Al_2O_3-were prepared to dress the CBN composite specimens. A carrier was designed and manufactured has a shape similar to that of a wheel in order to hold the CBN composite specimens, which was then attached to the spindle of the grinder to carry out the grinding processes. The worn surfaces of the CBN composites were examined using scanning electron microscopy. Also, the surface characteristics and wear rate of the CBN composite specimens, the material removal rate, and the surface roughness of the SKD11 steel were investigated under dry grinding conditions. The experimental results indicated that there was considerable improvement in the process performance of the graphite-impregnated CBN structure.