关键词: 电火花线切割；莱氏体钢；切割速率；切割时间

Abstract: Magnetic materials serve as the primary structural components in electromagnetic mechanics and are among the essential materials for electric vehicles. Wire electrical discharge machining (WEDM) is widely employed for processing these conductive materials, where machining precision directly impacts material performance. This study utilizes brass wire, galvanized copper wire, and Cu-Zn double-coated steel wire (HSC wire) to conduct parallel cutting experiments on 20 mm thick ledeburite steel under constant process parameters using a FANUCα-C600iA machine tool. Each group underwent three repeated trials, with results validated through data validity processing and one-way analysis of variance. The experiments demonstrates that HSC wire exhibited optimal cutting performance, achieving an average speed of 1.05 mm/min (a 23% improvement over brass wire and a 15% improvement over galvanized copper wire), with statistically significant differences in cutting speeds among the three materials. The superior performance of HSC wire stems from its high substrate stability and excellent conductive loss-reduction properties of the coating, coupled with controllable comprehensive costs, making it commercially viable. Future research could focus on composite coatings, core material modifications, and eco-friendly materials to optimize electrode performance, while also evaluating critical metrics such as coating adhesion.

Key words: wire electrical discharge machining; lyellitic steel; cutting speed; cutting time