About the article
V.V. IZMAILOV, Dr. Sc., M.V. NOVOSELOVA, Cand. Sc.
An assessment of the applicability of the thermal concept of electrical erosion to comparative tests of electrical contact materials for electrical discharge wear resistance in a pulsed discharge mode is carried out. A comparison of the values of specific erosion obtained experimentally and by theoretical calculation is presented. It is noted that to obtain a quantitative agreement between the experimental and theoretical estimates, it is necessary to use a semi-empirical approach, in which the parameters determined experimentally are used in the theoretical calculated dependences. The results of testing monolithic and composite specimens for electroerosive wear resistance confirmed that the Palatnik criterion, which combines a set of thermophysical characteristics of the electrode material, can be used for comparative assessment and selection of materials for contact parts.
electroerosive wear resistance, pulse discharge, Palatnik criterion, energy balance, specific electrical erosion.