Influences of metal constituents to the characteristics and grinding abilities of metal bonded diamond wheel

Abstract This paper describes how the affinity of diamond to metal influences the holding of abrasive grits by a bond and the chemical reactions among metal constituents influence to the mechanical properties of bond. These influences to the grinding abilities of wheel are verified experimentally and qualitatively from the wetting and thermal erosion tests of diamond by metals, the metal sintering and wear test, and the grinding tests of wheel. A CU Sn alloy is not suitable for bond due to its large ductility. The durable bond of wheel is expected by diffusing Ni in a Cu Sn alloy. The considerable grinding efficiency of wheel is obtained with diffusing Co and Ti into a Cu Sn alloy due to their good reactivities. The brittle bond of wheel causes from the little reactivity among Cu Sn, Ta and Cr . The large quantity of the elasto-plastic failure energy of bond provides the increase of grinding efficiency and the decrease of wheel wear in all kinds of wheel. Consequently, the large grinding ratios are derived by the increase of the elasto-plastic fracture energy which will be one of the estimation factors of wheel grinding ability.