前言随着电火花加工方法的广泛应用,电火花加工表面质量问题便显得日益重要。电火花加工表面与机械加工表面存在本质上的不同,它是在瞬时高温作用下,材料被汽化、熔化后抛出,表面由一个个小圆坑组成。被加工材料的表面层发生了很大的变化,粗略地可把它分为熔化层(白层)和热影响层。由于电火花加工表面受到瞬 Preface With the widespread use of EDM methods, EDM surface quality issues have become increasingly important. EDM machined surface and the surface there is a fundamental difference, it is in the instantaneous high temperature, the material is vaporized, melted and thrown, the surface consists of a small pit. The surface layer of the material to be processed has undergone great changes, roughly divided into a melted layer (white layer) and a heat-affected layer. Due to EDM surface instantaneous