关键词: 电火花加工；水蒸汽, 材料去除率；电极损耗

Abstract:

This paper investigated electrical discharge machining in water vapor. This technique took high pressure water vapor as the dielectric medium. Experimental results show EDM in water vapor exhibits advantage of lower tool wear, better machining stability. Generally, material removal rate (MRR) raises with the increase of discharge pulse duration time and discharge current , but decreases with the increase of pulse interval time. It is valuable that tool electrode wear is kept in a low level in most cases, but it is relatively higher at higher discharge current. 

Key words: EDM, water vapor, MRR, tool electrode wear