Some experiments on electrolytic grinding of a hypersilumin which showed very poor machinability in respect of tool wear are carried out with a sodium nitrate solution as electrolyte and a trial electrolytic grinding wheel for the purpose of examining the applicability of electrolytic grinding on the alloy.
As the results, the applicability of electrolytic grinding on the alloy is superior and there are optimum electrolytic grinding conditions, i. e. current density, grinding pressure, grinding speed, electrolyte flow rate and others, in which the grinding removal rate is effective and the ground surface is better than that obtained by mechanical grinding, The structure and the heat treatment of the alloy show no great influences on the optimum electrolytic grinding conditions.