镍基高温合金微细电火花加工实验研究  

Experimental Study on Micro-EDM of Nickel Based High-temperature Alloy

作　　者：齐旭东 杜连明[1] 王蕾 曲胜 QI Xudong;DU Lianming;WANG Lei;QU Sheng(School of Mechanical Engineering,University of Jinan,Jinan 250022,China)

机构地区：[1]济南大学机械工程学院,山东济南250022

出　　处：《电加工与模具》2024年第6期8-12,共5页Electromachining & Mould

基　　金：山东省重点研发计划项目(2021JMRH0301);山东省工程机械智能装备创新创业共同体重点项目(GTT20220208)。

摘　　要：镍基高温合金具有优异的耐高温性、良好的抗氧化性和抗疲劳性,属于典型的难加工材料。微细电火花加工属于非接触式加工,无宏观切削应力,在高硬度、高强度、难加工材料加工中具有传统加工方式无法比拟的优势。以GH4169镍基高温合金为研究对象,研究开路电压、峰值电流、脉冲宽度和主轴转速等参数对加工效率和加工质量的影响。结果表明:电压从60 V增大到100 V时,材料去除率增加了81.7%;电容自330 pF增长到10 nF时,材料去除率增加了19.7%;电阻自20 kΩ减小到1 kΩ时,材料去除率增加了187%;提高主轴转速,可改善加工过程中蚀除产物的排出效果,进而增强加工的稳定性。Nickel based high-temperature alloy has excellent high-temperature performance,good oxidation resistance and fatigue performance,and are typical difficult to machine materials.Micro electric discharge machining(micro-EDM)belongs to non-contact machining,without macroscopic cutting stress,and has advantages that traditional machining methods cannot match in the processing of high hardness,high strength,and difficult to machine materials.Taking nickel based high-temperature alloy GH4169 as the research object,the effects of electrical parameters such as open circuit voltage,peak current,pulse width,and non-electrical parameters such as spindle speed on machining quality and efficiency were studied.The results showed that the material removal rate increased by 81.7%when the voltage increased from 60 V to 100 V.When the capacitance increased from 330 pF to 10 nF,the material removal rate increased by 19.7%.The material removal rate increased by 187%when the resistance decreased from 20 k2 to 1Ωk2Ω.Increasing the spindle speed can improve the discharge effect of corrosion products during the machining process and enhance the stability of the machining.

关 键 词：镍基高温合金 GH4169 微细电火花加工 工艺参数 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]