Abstract
The cutting tool is prone to wear and failure during turning process, which affects the quality of the machined surface. In order to increase the hardness, wear resistance, and extend lifespan of the cutting tool, this work proposed a CrCN super-hard coating and optimized its parameters of preparation process. The CrCN super-hard coating was deposited on cemented carbides by radio frequency reactive magnetron sputtering. Cr3C2 (99.9%) was selected as the target, N2 and Ar as the reaction gas. The effects of power, N2/Ar flow ratio, deposition temperature, and deposition pressure on the properties of deposited CrCN super-hard coatings were investigated. The deposition rate, Vickers hardness, crystal degree, and surface morphology of the coating were comprehensive analyzed, and then, the optimal parameters for preparing CrCN super-hard coating were obtained: sputtering power of 300 W, N2/Ar gas flow ratio of 4/46 sccm, deposition temperature of 200 °C, and deposition pressure of 0.8 Pa. After measurement, the physical and mechanical properties of the CrCN super-hard coating were: the thickness of 1.8 μm, the hardness of 2700 HV, and the bonding force of 52 N.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51505399 and 51975496), the Natural Science Foundation of Fujian Province of China (Grant No. 2017J05088) and Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology.
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Zhang, T., Mu, C., Zhao, G. et al. Preparation of CrCN Super-Hard Coating. J. of Materi Eng and Perform 29, 7872–7882 (2020). https://doi.org/10.1007/s11665-020-05304-9
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DOI: https://doi.org/10.1007/s11665-020-05304-9