Grinding force and surface quality in creep feed profile grinding of turbine blade root of nickel-based superalloy with microcrystalline alumina abrasive wheels  

作　　者：Qing MIAO Wenfeng DING Weijie KUANG Changyong YANG 

机构地区：[1]National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Chinese Journal of Aeronautics》2021年第2期576-585,共10页中国航空学报（英文版）

基　　金：financial support for this work by the National Natural Science Foundation of China (No. 51775275);the Funding of Jiangsu Innovation Program for Graduate Education of China (KYCX170245);the Funding for Outstanding Doctoral Dissertation in NUAA of China (BCXJ17-04);the Fundamental Research Funds for the Central University of China (No. NP2018110);the National Science and Technology Major Project and the Six Talents Summit Project in Jiangsu Province of China (No.JXQC-002)。

摘　　要：Creep feed profile grinding of the fir-tree blade root forms of single crystal nickel-based superalloy was conducted using microcrystalline alumina abrasive wheels in the present study. The grinding force and the surface quality in terms of surface topography, subsurface microstructure,microhardness and residual stress obtained under different grinding conditions were evaluated comparatively. Experimental results indicated that the grinding force was influenced significantly by the competing predominance between the grinding parameters and the cross-sectional root workpiece profile. In addition, the root workpiece surface, including the root peak and valley regions, was produced with the large difference in surface quality due to the nonuniform grinding loads along the root workpiece profile in normal section. Detailed results showed that the surface roughness, subsurface plastic deformation and work hardening level of the root valley region were higher by up to25%, 20% and 7% in average than those obtained in the root peak region, respectively, in the current investigation. Finally, the superior parameters were recommended in the creep feed profile grinding of the fir-tree blade root forms. This study is helpful to provide industry guidance to optimize the machining process for the high-valued parts with complicated profiles.

关 键 词：Creep feed profile grinding Fir-tree blade root Grinding force Single crystal nickel-based superalloy Surface quality 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]