Dr. Yongguo Wang Profile

Dr. Yongguo Wang

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Proceedings Article | 24 May 2011 Paper

Study on the wear mechanism and tool life of coated gun drill

Yongguo Wang, Xiangping Yan, Xiaoguang Chen, Changyu Sun, Xi Zhang

Proceedings Volume 7997, 799704 (2011) https://doi.org/10.1117/12.885573

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A comprehensive investigation of the wear progress for solid carbide gun drill coated with TiAlN by machining steel S48CSiV at a cutting speed of 12.66m/s has been performed. Cutting torque was recorded and tool wear mechanism was studied. The surface morphology of the tool and the chip have been studied by using scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). Results show that cutting torque fluctuates between 3% and 5% when machining less than 130 pieces of crankshaft, but it will sharply increased to nearly 18% while machining 150 pieces of crankshaft because the coating is damaged and the wear becoming severity. The dominant wear mechanisms are adhesive wear and chemical dissolution wear.

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