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前言电火花和线切割工艺,在模具制造中已被广泛应用,特别是线切割工艺给模具制造提供了广阔的前景。线切割是用火花放电的能量熔蚀金属进行加工的。在切割放电中,切割温度增高的速度可达10℃/秒,火花放电温度也高达2000℃以上。金属又同时受到乳化液冷却剂的急速冷却,模具表层发生了第二次淬火(已淬火的模具)过程,形成一层与基体不同的变质层。变质层的形态、硬度、耐磨性、耐蚀性都发生了
Preface EDM and wire cutting process, has been widely used in mold manufacturing, especially wire cutting process to the mold provides a broad prospect. Wire cutting is the use of spark discharge energy to melt metal processing. In the cutting discharge, the cutting temperature increases up to 10 ℃ / s, spark discharge temperature as high as 2000 ℃ above. At the same time, the metal is rapidly cooled by the emulsion coolant. A second quench (quenched mold) occurs on the surface of the mold to form a metamorphic layer that is different from the matrix. Metamorphic layer morphology, hardness, wear resistance, corrosion resistance have occurred