机械科学与技术2025，Vol.44Issue(6)：1003-1012,10.DOI:10.13433/j.cnki.1003-8728.20230265
侧铣加工高温合金工件显微硬度建模与分析
Modeling and Analysis of Microhardness in Side Milling of Superalloy Workpieces
摘要
Abstract
In this study,a cutting force model was established for the side milling conditions of superalloy GH4169,which considered the instantaneous undeformed chip thickness and the real-time changes of the contact angle caused by the geometric characteristics of the workpiece profile and the tool wear during the cutting process.Then considering the effects of cutting force fluctuation and temperature accumulation on the microhardness,a prediction model for the microhardness of workpieces processed by side milling was established based on the dislocation density-based model.By carrying out experiments and comparing the experimental data,the accuracy of the modelis verified.Andit was found in the experiment that when the radius of curvature of the workpiece profile suddenly changed from infinity to about 5 mm,the peak value of cutting force significantly changed,the surface microhardness value and the depth of the hardened layer also increased.Finally,a three-factor and three-level orthogonal simulation is designed to explore the influence of processing parameters on microhardness.The results demonstrate that within the studied machining parameter range,the surface microhardness increases with the increase of the axial depth of cut,while the depth of the hardened layer decreases with the increase of the spindle speed and increases with the increase of the feed speed and the axial depth of cut.关键词
高温合金GH4169/侧铣加工/切削力波动/刀具磨损/显微硬度Key words
superalloy GH4169/side milling/cutting force fluctuation/tool wear/microhardness分类
矿业与冶金引用本文复制引用
林杰羽,张杭,邓犇,王峻晖,闫澳迪,闫蓉,彭芳瑜..侧铣加工高温合金工件显微硬度建模与分析[J].机械科学与技术,2025,44(6):1003-1012,10.基金项目
国家自然科学基金项目(92160301)与青年科学基金项目(52105447) （92160301）
