• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

机械工程学报 ›› 2026, Vol. 62 ›› Issue (7): 439-451.doi: 10.3901/JME.260388

• 制造工艺与装备 • 上一篇    

扫码分享

超声椭圆振动铣削GH4169切削特性及亚表层力学性能研究

夏子文1,2, 单晨伟1,2,3, 张猛猛1,2, 刘文港1,2, 崔敏超1,2, 罗明1,2,3   

  1. 1. 西北工业大学航空发动机高性能制造工业和信息化部重点实验室 西安 710072;
    2. 西北工业大学航空发动机先进制造技术教育部工程研究中心 西安 710072;
    3. 硬质合金国家重点实验室 西安 710072
  • 收稿日期:2025-04-19 修回日期:2025-08-09 发布日期:2026-05-25
  • 作者简介:夏子文，男，1994年出生，博士研究生。主要研究方向为超声振动加工技术。E-mail:zwin@mail.nwpu.edu.cn
    单晨伟(通信作者)，男，1978年出生，博士，教授，博士研究生导师。主要研究方向为多能场辅助加工技术，新型材料加工技术。E-mail:shancw@nwpu.edu.cn
  • 基金资助:
    国家自然科学基金(91960203)、中央高校基本科研业务费专项基金(D5000230048)资助项目。

Influence of Elliptical Ultrasonic Vibration Milling on Cutting Characteristics and Subsurface Mechanical Properties of GH4169

XIA Ziwen1,2, SHAN Chenwei1,2,3, ZHANG Mengmeng1,2, LIU Wengang1,2, CUI Minchao1,2, LUO Ming1,2,3   

  1. 1. Key Laboratory of High Performance Manufacturing for Aero Engine of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an 710072;
    2. Engineering Research Center of Advanced Manufacturing Technology for Aero Engine of Ministry of Education, Northwestern Polytechnical University, Xi'an 710072;
    3. State Key Laboratory of Cemented Carbide, Xi'an 710072
  • Received:2025-04-19 Revised:2025-08-09 Published:2026-05-25

PDF

6

摘要： 为探究超声椭圆振动铣削(Elliptical ultrasonic vibration milling, EUAM)改善GH4169亚表层力学性能的内在机理，开展了EUVM和传统铣削(Conventional milling, CM)实验，研究了不同加工参数下的切削特性；通过材料表征技术，分析了不同加工参数下的亚表层材料显微组织变化特征，揭示了加工工艺对亚表层力学性能的影响机制。结果表明，在湿式切削条件下，EUVM的切削力整体高于CM，增幅最高可达16.76%；另外，相似的切削力峰值位置表明影响切削力的决定性因素为切削参数，而非振动参数。EUVM条件下的加工表面具有均匀排列的波形微织构形貌，粗糙度相对较大，Ra最高为0.781 μm。EUVM的冲击和速度效应促进了亚表层材料的位错运动和交互，提高了位错密度和小角度晶界占比。相比CM，EUVM条件下的材料组织变化使表面加工硬化程度最大提高48.4%，表面残余压应力最大可增加76.98%。然而，工艺水平的提高会导致两种加工方式的位错密度差异减小，切削速度的增加弱化了超声振动切削效应。研究成果可为GH4169抗疲劳制造技术提供进一步的指导和参考。

关键词: 超声椭圆振动铣削, GH4169, 切削特性, 显微组织, 力学性能

Abstract: To study the intrinsic mechanism by which elliptical ultrasonic vibration milling (EUVM) enhances the subsurface mechanical properties of GH4169, comparative experiments are conducted under both EUVM and conventional milling (CM). The cutting characteristics are investigated under varying cutting parameters. Subsurface microstructural changes are analyzed using material characterization techniques, and the effect of machining conditions on subsurface mechanical behavior is revealed. Experimental results indicate that the cutting force of EUVM, under wet cutting, is overall higher than that of CM, up to 16.76%. Similar force peak positions suggest that the determining factors affecting the cutting force are the cutting parameters rather than the vibration parameters. EUVM produces uniformly arranged wavy micro-textures on the machined surface, resulting in increased surface roughness, up to 0.781 μm. An increased number of low-angle grain boundaries and higher dislocation densities in the subsurface grains are observed, attributed to the enhanced dislocation motion and interaction induced by the vibrational and velocity effects of EUVM. Compared with CM, EUVM-induced microstructural evolution contributes to a maximum increase of 48.4% in work hardening and 76.98% in compressive residual stress. However, the gap in dislocation density between EUVM and CM is reduced at higher process levels, primarily due to the weakening of ultrasonic vibration effects at elevated cutting speeds. The results provide valuable guidance and reference for the fatigue-resistant manufacturing of GH4169.

Key words: elliptical ultrasonic vibration milling, GH4169, cutting characteristic, microstructure, mechanical properties

中图分类号: 

版权所有 © 2019 《机械工程学报》编辑部 | 京ICP备05055788号-30