Effect of Cryogenic Treatment on Surface Integrity and Cutting Performance of Al2O3-SiCw Ceramic Tools
LUO Chuanyue1, ZHENG Guangming1,*, GAI Shaolei2, JIANG Xiuli3, YANG Xianhai1, CHENG Xiang1
1 School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, Shandong, China 2 Binzhou Bohai Piston Co., Ltd., Binzhou 256606, Shandong, China 3 Shandong Institute of Mechanical Design and Research, Jinan 250031, Shandong, China
Abstract: The ceramic tool severely wears in the process of high-speed cutting of superalloy. By using cryogenic treatment technology, the surface integrity of the ceramic tool is improved. Moreover, the wear resistance is enhanced during high-speed cutting process. Based on the cryogenic treatment of ceramic tool of Al2O3-SiCw and high-speed cutting superalloy experiments, the effect of cryogenic treatment on the surface integrity and cutting performance of ceramic tools were studied. The research shows that the defects such as pits, groove marks and cracks on the surface of the tool are significantly reduced after the ceramic tool is cryogenically treated. And the Vickers hardness of surface is significantly increased. Compared with untreated tool, the surface residual compressive stress (absolute value) of the ceramic tool can be significantly increased by 70%. On the other hand, the Vickers hardness of the surface of the tool has the greatest impact on chip deformation, cutting force, and tool wear. The improvement of the surface Vickers hardness enhances the wear resistance of the tool. The high cutting performance of the ceramic tool can be obtained at the conditions of cryogenic treatment at -150 ℃ and 18 h.
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2023, Vol. 37 
