考虑脆性相TiC颗粒的镍基高温合金磨削仿真研究  

Simulation Study on Grinding of Nickel Based Superalloy Considering Brittle TiC Particle

作　　者：陈宏轩 曾鑫 陈帅 Chen Hongxuan;Zeng Xin;Chen Shuai(College of Mechanical Engineering,Hunan University of Technology,Zhuzhou,Hunan 412007,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007

出　　处：《机电工程技术》2025年第5期16-22,共7页Mechanical & Electrical Engineering Technology

基　　金：湖南省教育厅研究项目优秀青年项目(22B0584)。

摘　　要：镍基高温合金GH4169其增强相由高硬度化合物TiC构成,加工过程中会对工件的表面质量造成一定的影响。基于磨削基本理论和材料的J-C本构方程,采用ABAQUS仿真软件,建立了含单颗TiC颗粒的镍基高温合金GH4169单颗磨粒正交磨削模型,研究了磨削过程中基体材料的变形以及磨粒-脆性相颗粒的相互作用过程,分析了颗粒分别位于磨削路径上方0.05μm、路径下方不同深度和沿着路径3种情况下磨削过程中磨削力和颗粒的去除过程以及应力场演变过程。仿真结果表明:当颗粒位于磨削路径下方时对加工过程影响较小,其余两种情况对磨削力的影响较大;当颗粒位于磨削路径上方时,其主要的去除形式为压溃;当颗粒沿着磨削路径时,其去除过程经历了裂纹萌生、裂纹扩展和颗粒完全断裂3个阶段,且两种情况下其应力和应变场都呈现碎片化分布,说明了颗粒的位置在确定应力的传播机制中具有重要的作用。研究结果可为进一步探究GH4169磨削过程中微结构演变机理提供参考。The reinforcing phase of nickel-based superalloy GH4169 is composed of high hardness compound TiC,which will have a certain impact on the surface quality of the workpiece during machining.Based on the basic theory of grinding and the J-C constitutive equation of the material,the orthogonal grinding model of a single abrasive grain of nickel-based superalloy GH4169 containing a single TiC particle is established by using ABAQUS simulation software,the deformation of the matrix material and the interaction process between abrasive particles and brittle phase particles during the grinding process are studied,and the removal process of grinding force and particles and the evolution of stress field during the grinding process are analyzed under the condition that the particles are located 0.05μm above the grinding path,at different depths below the path and along the path.The simulation results show that when the particles are located below the grinding path,they have little influence on the machining process,and in the other two cases,they have a greater impact on the grinding force.When the particles are located above the grinding path,the main form of removal is crushing.When the particles follow the grinding path,the removal process goes through three stages:crack initiation,crack propagation and complete particle fracture,and the stress and strain fields are fragmented in both cases,indicating that the position of the particles plays an important role in determining the stress propagation mechanism.The results can provide a reference for further exploring the microstructure evolution mechanism of GH4169 during the grinding process.

关 键 词：脆性相 镍基高温合金 磨削力 应力场 有限元模拟 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]