Comparative investigation on high-speed grinding of TiCp/Ti–6Al–4V particulate reinforced titanium matrix composites with single-layer electroplated and brazed CBN wheels  

作　　者：Li Zheng Ding Wenfeng Shen Long Xi Xinxin Fu Yucan 

机构地区：[1]College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics

出　　处：《Chinese Journal of Aeronautics》2016年第5期1414-1424,共11页中国航空学报（英文版）

基　　金：the financial support for this work by the National Natural Science Foundation of China (No.51235004 and No.51375235);the Fundamental Research Funds for the Central Universities (No.NE2014103);the Science and Technology Supporting Program of Jiangsu Province (No.BE2013109 and No.BY2014003-008)

摘　　要：In order to develop the high-efficiency and precision machining technique of TiCp/Ti - 6Al-4V particulate reinforced titanium matrix composites （PTMCs）, high-speed grinding experiments were conducted using the single-layer electroplated cubic boron nitride （CBN） wheel and brazed CBN wheel, respectively. The comparative grinding performance was studied in terms of grinding force, grinding temperature, grinding-induced surface features and defects. The results display that the grinding forces and grinding temperature obtained with the brazed CBN wheel are always lower than those with the electroplated CBN wheel. Though the voids and microcracks are the dominant grinding-induced surface defects, the brazed CBN wheel produces less surface defects compared to the electroplated wheel according to the statistical analysis results. The max mum materials removal rate with the brazed CBN wheel is much higher than that with the electroplated one. All above indicate that the single-layer brazed CBN super-abrasive wheel is more suitable for high-speed grinding of PTMCs than the electroplated counterpart.In order to develop the high-efficiency and precision machining technique of TiCp/Ti - 6Al-4V particulate reinforced titanium matrix composites （PTMCs）, high-speed grinding experiments were conducted using the single-layer electroplated cubic boron nitride （CBN） wheel and brazed CBN wheel, respectively. The comparative grinding performance was studied in terms of grinding force, grinding temperature, grinding-induced surface features and defects. The results display that the grinding forces and grinding temperature obtained with the brazed CBN wheel are always lower than those with the electroplated CBN wheel. Though the voids and microcracks are the dominant grinding-induced surface defects, the brazed CBN wheel produces less surface defects compared to the electroplated wheel according to the statistical analysis results. The max mum materials removal rate with the brazed CBN wheel is much higher than that with the electroplated one. All above indicate that the single-layer brazed CBN super-abrasive wheel is more suitable for high-speed grinding of PTMCs than the electroplated counterpart.

关 键 词：High-speed grinding PTMCs Single-layer brazed CBNwheel Single-layer electroplated CBN wheel Surface defects 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]