本文介绍了在电火花加工（EDM）过程中，对几种相似和不同材料的工件/刀具对的腐蚀率进行的实验估计。根据Dibitono等人[3]提出的针对阴极侵蚀的点热源模型（PHSM），对阴极的实验侵蚀率进行了评估。考虑的材料包括钢、铜、钛和石墨。本文提出，PHSM可用于估算阴极材料的侵蚀率，前提是假设进入阴极的能量分数是每脉冲能量输入的函数。得出的结论是，每个脉冲对电极、电介质和等离子体的能量分布，以及它们的腐蚀速率，在很大程度上取决于电极材料对及其极性。

The paper presents experimental estimates of erosion rates of few work/tool pairs of similar and dissimilar materials, during Electric Discharge Machining (EDM) process. Experimental erosion rates of cathode are evaluated against the pointed heat source model (PHSM), proposed by Dibitonto et al. [3], specifically for cathode erosion. Materials considered are steel, copper, titanium and graphite. This paper proposes that the PHSM can be used to estimate the erosion rate for the cathode material provided it is assumed that the fraction of energy going to the cathode is a function of energy input per pulse. It is concluded that the distribution of energy per pulse to the electrodes, dielectric and plasma, and hence their erosion rates, depend significantly on the electrode material pair and their polarity.