航空用不锈钢磨粒流光整加工表面完整性研究  

Study on Surface Integrity of Aviation Stainless Steel in Abrasive Flow Machining

作　　者：杨范轩 孙玉利[1] 马杰[1] 范武林 赵建社[1] 盛一 左敦稳[1] YANG Fanxuan;SUN Yuli;MA Jie;FAN Wulin;ZHAO Jianshe;SHENG Yi;ZUO Dunwen(College of Mechanical and Electronic Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;Nanjing Xinghe Precision Intelligent Manufacturing Research Institute Co.,Ltd.,Nanjing 211106,China;Nanjing Huaceda Precision Machinery CO.,Ltd.,Nanjing 211121,China)

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]南京星合精密智能制造研究院有限公司,南京211106 [3]南京华测达精密机械有限公司,南京211121

出　　处：《南京航空航天大学学报》2023年第3期452-460,共9页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：江苏省重点研发计划项目(产业前瞻与关键核心技术)(BE2022150);南京市科技计划项目-国际联合研发项目(202002047);江苏省研究生科研创新计划项目(KYCX21_0190);南京航空航天大学2021年度研究生科研与实践创新计划项目(xcxjh20210504)。

摘　　要：为研究磨粒流光整加工不锈钢闭式整体叶环的表面完整性,通过对电火花制备的不锈钢试样进行加工时间、加工压强及磨料目数的单因素试验,研究3个因素对加工后表面完整性的影响。结果表明:表面粗糙度Ra随着加工时间的增加而降低,从初始时的1.459μm降至60 min时的0.193μm,降低速率越来越慢,最后趋于稳定。磨粒流加工有效去除了加工表面再铸层。显微硬度在加工后明显降低,由450~950 HV降至270~350 HV且分布均匀性得到改善。显微硬度随着加工时间的增加整体上呈降低趋势,并出现了一定的加工硬化现象。在使用不同目数的磨料进行磨粒流加工后,残余应力由拉应力变为压应力。随着加工时间和加工压强的增加,试样表面越平整,抛光效果越好。To study the surface integrity of the stainless steel closed integral bling in abrasive flow machining,single factor tests of processing time,processing pressure and abrasive mesh size are carried out on the stainless steel samples prepared by electrical discharge machining,and the influence of three factors on the surface integrity after machining is investigated.The surface roughness value Ra decreases with the increase of processing time,from 1.459μm at the initial time to 0.193μm at 60 min.The surface roughness decreases at a slower and slower rate,and finally tends to stabilize.The recast layer is effectively removed by abrasive flow machining,and the microhardness decreases from 450~950 HV to 270~350 HV after machining,and the distribution uniformity is improved.The microhardness decreases with the increase of processing time,and some work hardening occurs.The residual stress changes from tensile stress to compressive stress after abrasive flow machining with different mesh numbers of abrasives.With the increase of processing time and pressure,the smoother the sample surface is,the better the polishing effect will be.

关 键 词：不锈钢 闭式整体叶环 表面完整性 磨粒流光整加工 电火花加工 

分 类 号：TG580[金属学及工艺—金属切削加工及机床]