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| Performance Evaluation on Grinding of Nickel-Based Superalloy GH4169 Using New Corundum Abrasive Wheel |
| LI Benkai1 , DING Wenfeng1 , MA Yanyan2 , XIAO Hong3 , HUANG Qingfei2 , SI Wenyuan2 , YANG Jia3 |
| (1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2. Suzhou Far-East Abrasives Co., Ltd., Suzhou 215151, China; 3. AECC Xi’an Aero-Engine Ltd., Xi’an 710021, China) |
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Abstract Nickel-based superalloys are commonly used materials in the field of aircraft engines. There are some issues on grinding of nickel-based superalloy, such as serious tool wear and short service life. In this paper, the experiments on grinding of nickel-based superalloy material GH4169 was conducted using three kinds of newly developed corundum abrasive wheels, namely, microcrystalline and single crystalline mixed corundum abrasive wheel with the grain size of 60#, single crystalline corundum abrasive wheel with the grain size of 60#, and single crystalline corundum abrasive wheel with the grain size of 70#. The grinding performance was evaluated from the grinding force, grinding temperature, abrasive wheel wear, and surface roughness. The results showed that there was no obvious difference in abrasive wheel wear and surface roughness when grinding GH4169 material with three kinds of grinding wheels. However, through the comprehensive evaluation of grinding force and grinding temperature, it is found that the single crystalline corundum abrasive wheel with the grain size of 60# has better grinding performance. The grinding ratio of the three kinds of abrasive wheels was in the range of 0.5–3. The surface roughness Ra is less than 0.4μm under normal grinding conditions. Besides, it is found that the abrasive wheel wear (mainly including the crushing and shedding of abrasive grains) is an important reason for the formation of grinding surface defects.
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2021, 
