A Study of the Potential of Improving Performance of AS20 Diamond Powders Through Altering Their Dimensional and Physico-Chemical Characteristics

Resumo

We have studied performance of AS20 diamond powders to be used in grinding wheels and have found the ways to improve it through changing the dimensional and physico-chemical characteristics of the powders. It is demonstrated that the wheel wear is influenced by separating the narrowest range of grain sizes 100/90 and providing a uniform powder with a certain grain shape factor; it is preferable to use diamond grains with higher values of the shape factor. It is shown that after diamond powders are separated into magnetic and non-magnetic fractions there is a difference between the fractions in the physico-chemical state of the grain surfaces, and it is preferable to use non-magnetic fractions in resin-bonded wheels in order to improve the wheel wear resistance.