Electrode wire for low-speed wire feeding electric spark machining

The invention discloses an electrode wire for low-speed wire feeding electric spark machining. The electrode wire comprises a core material; the middle layer is positioned outside the core material; the surface layer is positioned outside the middle layer; wherein the core material is metal or alloy, the middle layer is copper-zinc alloy, and the surface layer contains carbon element; the content of carbon on the surface of the electrode wire is 0.2-60 wt%. The electrode wire for low-speed wire feeding electric spark machining has good surface layer conductivity, the high cutting machining speed can be kept for a long time, the machining precision is high, and the preparation technology is simple. 本发明公开了一种慢走丝电火花加工用电极丝，包括：芯材；中间层，其位于所述芯材外部；以及，表层，其位于所述中间层外部；其中，所述芯材为金属或合金，所述中间层为铜锌合金，所述表层含有碳元素；所述电极丝表面碳元素含量为0.2-60wt％。本发明慢走丝电火花加工用电极丝具良好的表层导电性能，能够长时间保持高切割加工速度，加工精度高且制备工艺简单。