高温合金磨削热力耦合及其对表面完整性的影响研究现状  

Research Status of Superalloy Grinding Thermal Mechanical Coupling and Their Effects on Surface Integrity

作　　者：刘颖[1,2] 徐佳玉[1] 肖贵坚 周坤[1,2] 李少川 黄云 LIU Ying;XU Jia-yu;XIAO Gui-jian;ZHOU Kun;LI Shao-chuan;HUANG Yun(College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing 400044,China;State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学机械与运载工程学院,重庆400044 [2]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《表面技术》2023年第3期1-18,34,共19页Surface Technology

基　　金：国家自然科学基金联合基金(U1908232);中国博士后基金会面上项目(2021M700586);国家科技重大专项(2017-Ⅶ-0002-0095)。

摘　　要：高温合金具有耐热性、耐腐蚀性等优良性能,被广泛应用于航空发动机的精密制造与修复。磨削能够提高部件的加工精度和表面完整性,是加工高温合金材料的重要方法。在磨削过程中,高温合金因材料的高强韧性,使得磨具磨损严重,并且磨削时冷却液难以进入磨削弧区,导致高温合金的磨削力和磨削温度较高。在多刃磨削加工下,复杂的热-力耦合过程对高温合金表面完整性有着重要影响,表面完整性直接影响服役性能。从产生机理、表征方法及控制等方面阐述了磨削热和磨削力的研究现状,首先介绍了高温合金磨削热及磨削力产生的机理及原因,进而从刚性磨削和柔性磨削的角度综述了磨削温度和磨削力的预测模型及方法,从冷却润滑、工艺参数优化及砂轮结构改进等方面调研了磨削温度和磨削力的控制策略。从间接耦合法的角度介绍了磨削热-力耦合建模过程。最后,在概述磨削热力耦合的基础上,总结了在磨削热力耦合作用下高温合金的表面粗糙度、表面形貌、组织结构及残余应力等方面的研究成果,并对高温合金磨削热力耦合作用的研究方向进行了展望。Superalloys are widely used in precision manufacturing and repair of aero-engines because of their excellent properties in heat resistance and corrosion resistance.As the last process of machining,grinding can improve the machining accuracy and surface integrity of components.It is an important method to process superalloy materials.In the grinding process of superalloys,the grinding force and grinding temperature of superalloys are high due to the high strength and toughness of materials,serious wear of abrasives in the grinding process,and the difficulty of coolant entering the grinding contact arc area.The complex thermal-mechanical coupling process in multi-edge grinding has an important impact on the surface integrity of superalloys.The surface integrity directly affects the service performance of components.Therefore,the research status of grinding heat and grinding force was introduced from three aspects:generation mechanism,characterization method,and control method.Firstly,the generation mechanism of superalloy grinding heat and grinding force,the detection method of grinding temperature,the reasons for high superalloy grinding temperature and grinding force,and the conduction of grinding temperature were introduced.Furthermore,the prediction models and methods of grinding temperature and grinding force were summarized from the perspective of rigid grinding and flexible grinding.The research on the modeling of grinding temperature and grinding force under rigid contact was sufficient,while the modeling of grinding temperature and grinding force under flexible contact did not consider the elasticity adequately or ignored the elasticity,therefore,the accuracy of the prediction results of grinding temperature and grinding force under flexible contact was affected.The control strategies of grinding temperature and grinding force were investigated from the aspects of cooling lubrication,optimization of process parameters,and improvement of grinding wheel structure,so as to provide guidance for reducing grindi

关 键 词：高温合金 磨削 热力耦合 表面完整性 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]