五十年代初期，我国开始研究和应用电火花加工技术。首先采用的工艺技术是电火花镀覆，几把硬质合金材料用电火花工艺镀覆在高速钢金属切削刀具和冷冲模具刃口上，明显地提高了金属切削刀具和模具的使用寿命；同时，使用电火花加工进行穿孔、制模、切断、磨削、刻字、取折断于工件孔内的丝锥或钻头和修理工件等；以后，又用于成批加工材油机喷嘴小孔和磨削零件内孔。

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