Xu J.,Nanjing University of Aeronautics and Astronautics |
Xu J.,Jiangsu Provincial Key Laboratory of Precision and Micro Manufacturing Technology |
Lu W.,Nanjing University of Aeronautics and Astronautics |
Lu W.,Jiangsu Provincial Key Laboratory of Precision and Micro Manufacturing Technology |
And 8 more authors.
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | Year: 2014
Titanium alloy is a difficult-to-grind material. The grinding surface can be easily damaged during the grinding process because of the high grinding temperature. Grinding experiments were performed in this study to investigate the grinding surface properties of titanium alloy TC4-DT using the SEM, EDS, XRD, Microhardness tester, Metallographic microscope and ball-disk friction wear tester. The results show that good quality grinding surface with improved wear property of TC4-DT can be obtained when the grinding speed is relatively low. When the grinding speed is 80 m/s, good quality surface is obtained with the friction coefficient of 0.38, which is 40% lower than the matrix. However, burns and micro cracks appear when the grinding speed is 100 m/s. So burns and cracks can be avoided by choosing reasonable grinding parameters. The dry wear mechanisms of the grinding surface are adhesive abrasion, abrasive grain abrasion and delamination abrasion.