Abstract
Previous experiments using simple grinding wheels consisting of a single layer of cubic boron nitride (CBN) or diamond grits on an electroplated rod have shown that the production of wear flats on the grits leads to an increasing grinding force which eventually results in the destruction of the nib. In one of the present experiments, similar worn areas are observed on the grits in a conventional type grinding wheel. The wear of the flats appears to be similar in type to that observed on the flanks of turning tools fabricated from single crystals of diamond and CBN. Experiments with such turning tools show wide variations in the rates of wear between diamond and CBN and between different difficult metal workpieces. These and previous results imply that the flats are formed by an attritious wear process conditioned by the chemical constitution of the tool, workpiece and environment. Further consideration of these various points should lead to the enhanced performance of diamond and CBN grinding wheels.
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