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 kΩ to 1 kΩ.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
Key words
nickel based high-temperature alloys/GH4169/micro-EDM/processing parameters
维普
万方数据