Surface integrity of GH4169 affected by cantilever finish grinding and the application in aero-engine blades

作     者：Li Xun Ma Shuang Meng Fanjun 

作者机构：School of Mechanical Engineering and Automation Beihang University 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2015年第28卷第5期

页      面：1539-1545页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：co-supported by the National Natural Science Foundation of China (No. 51105024) the National Science and Technology Major Project of China (No. 2013ZX04001051) 

主　　题：Blade:Cantilever:GH4169:Grinding:Surface integrity 

摘      要：GH4169 is the main material for aero-cngine blades and integrated blisks. Because GH4169 has a poor milling performance, the profile precision and surtace integrity of blades and integrated blisks are difficult to be met by utilizing the conventional milling process, which directly influence the global performance and reliability of aero-engines. Through grinding experiments on parameters and surface integrity optimization, the helical cantilever grinding process utilizing a 300# CBN RB wheel is presented and applied in finish machining of GH4169 blades. The profile errors of the blade surface are within ±0.01 mm, the roughness is less than 0.4μm, the residual compressive stresses and the hardening rate are appropriate, there are no phenomena of burr and smearing with the grinding chips, and the leading/trailing edge can be smoothly connected with the suction/pressure surface. All the experimental results indicate that this grinding process is greatly suitable for the profile finish machining of GH4169 blades.