粉末冶金γ-TiAl合金超声振动辅助铣削试验研究  

Experimental Study on Ultrasonic Vibration Assisted Milling of Powder Metallurgyγ-TiAl

作　　者：游逸飞 汪文虎[1] 黄博 肖培乾 刘晓芬 熊一峰 YOU Yifei;WANG Wenhu;HUANG Bo;XIAO Peiqian;LIU Xiaofen;XIONG Yifeng(MIIT Key Laboratory of High Performance Manufacturing for Aero Engine,MOE Engineering Research Center of Advanced Manufacturing Technology for Aero Engine,School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,China;School of Chemical Engineering and Modern Materials,Shangluo University,Shangluo 726000,China)

机构地区：[1]西北工业大学机电学院,航空发动机高性能制造工业和信息化部重点实验室,航空发动机先进制造技术教育部工程研究中心,陕西西安710072 [2]商洛学院化学工程与现代材料学院,陕西商洛726000

出　　处：《电加工与模具》2025年第2期59-65,72,共8页Electromachining & Mould

基　　金：国家自然科学基金青年基金项目(52405513);陕西省自然科学基础研究计划项目(2023-JC-QN-0527)。

摘　　要：粉末冶金γ-TiAl合金是典型的耐高温硬脆性难加工材料,采用传统切削工艺存在切削力较大、刀具磨损严重、易产生凹坑和崩边等损伤。为减小切削力、延长刀具寿命并改善加工表面质量,开展了粉末冶金γ-TiAl合金的普通铣削和超声振动辅助铣削试验,对比研究超声振动作用对铣削加工表面粗糙度、表面形貌、加工损伤的影响规律。结果表明:超声振动使粉末冶金γ-TiAl合金表面形成独特的纹理结构,提高超声频率和减小振幅均会导致加工表面粗糙度值增大;相比于普通铣削,超声振动作用下的刀具-工件周期性分离效应能有效降低切削力和刀具磨损,进而减少加工表面材料拔出,并且低频率高振幅超声振动抑制材料拔出的效果更加明显;为减少加工边缘崩碎并改善加工表面质量,超声振动辅助参数应选取切削速度70~100 m/min、每齿进给量小于0.1 mm/z、切削深度0.1~0.25 mm。The powder metallurgyγ-TiAl alloy is a typical high-temperature resistant,hard and brittle difficult-to-machine material.Traditional cutting results in high cutting forces,severe tool wear,and surface defects like pits and chipping.To address these issues,both conventional milling and ultrasonic vibration-assisted milling(UVM)experiments were conducted on the alloy.The effects of ultrasonic vibration on surface roughness,morphology,and machining damage were studied.Results indicate that ultrasonic vibration creates a unique surface texture on the alloy.Higher ultrasonic frequencies and lower amplitudes increase surface roughness.Compared to conventional milling,the tool-workpiece periodic separation under UVM reduces cutting forces and tool wear,minimizing material pull-out.Low-frequency,high-amplitude UVM is more effective in suppressing material pull-out.To reduce edge chipping and improve surface quality,optimal UVM parameters are:cutting speed of 70-100 m/min,feed per tooth<0.1 mm/z,and depth of cut of 0.1~0.25 mm.

关 键 词：Γ-TIAL合金 粉末冶金 超声辅助铣削 加工损伤 

分 类 号：TG663[金属学及工艺—金属切削加工及机床]