Ti-48Al-2Cr-2Nb脉冲电解加工参数优化及试验研究  

Parameter Optimization and Experimental Study of Pulse Electrochemical Machining of Ti-48Al-2Cr-2Nb

作　　者：顾大维 刘嘉[1] 汪浩[1] 朱荻[1] GU Dawei;LIU Jia;WANG Hao;ZHU Di(School of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《电加工与模具》2018年第3期20-25,共6页Electromachining & Mould

基　　金：国家自然科学基金资助项目(51405230);江苏省重点研发计划(BE2015160)

摘　　要：钛铝金属间化合物Ti-48Al-2Cr-2Nb(TiAl 4822)是一种优良的轻质、耐高温材料,已在航空发动机叶片领域获得重要应用。电解加工是国内外加工TiAl 4822材料的主要方法,与机械加工相比具有显著的效率和成本优势。针对TiAl 4822脉冲电解加工开展了参数优化研究,以加工电压、工具进给速度、电解液温度、脉冲占空比和脉冲频率等参数设计了正交试验,以加工工件的表面粗糙度和单位时间内材料蚀除体积速率为评价指标,采用层次分析法进行了分析,通过单因素试验对分析结果进行了验证。Ti-48Al-2Cr-2Nb(TiAl 4822)intermetallic is an excellent lightweight and high temperature resistant material which has been used in the field of aeronautics and astronautics.Electrochemical machining(ECM)is one of the main processing technologies for TiAl 4822 parts.Compared with traditional machining technologies,ECM has the outstanding advantages on machining efficiency and cost.This study focuses on parameter optimization of pulse electrochemical machining of TiAl 4822.The orthogonal experiments with the parameters of peak pulse voltage,duty ratio,frequency,electrode feed rate and electrolyte temperature were carried out.The experiments results were analyzed by the AHP(analytic hierarchy process)method with the evaluation indexes of material removal velocity and surface roughness.Single factor experiments were carried to verify the results of AHP.

关 键 词：钛铝金属间化合物 电解加工 正交试验 层次分析法 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]