Forming Small Diameter Holes in Tungsten – Cobalt Alloys

Abstract

The perspectives of combining the processes of electrochemical dissolving and electro-erosive removal of the processed material in forming small diameter holes in alloy WC-8Сo by a hollow electrode-tool are presented in the paper. It is established that in using immovable electrodes forming the cone in the hole takes place. The dependence of the piercing depth change on time is obtained. It testifies the decrease in the processing speed with increasing the inter-electrode gap. It is shown that during the electro-erosive – electrochemical process with immovable electrodes the productivity of small diameter hole piercing increased by 3 times in comparison with the electrochemical processing.