机械合金化对CNTs-SiC-Ni激光熔覆涂层力学性能的影响

本文应用机械合金化法制备了CNTs-SiC-Ni复合粉末, 采用激光熔覆技术制备了CNTs-SiC-Ni复合涂层, 研究了机械合金化对熔覆层的硬度和耐磨性的影响。结果表明, 随着机械合金化转速的提高, 镍粉、SiC粉末和CNTs逐渐混合均匀, 形成了CNTs-SiC-Ni核壳式复合粒子, 镍颗粒表面复合包覆层面积呈指数函数增加, 然后趋于稳定, 转速为300 r/min时, 粉末复合效果最佳; 随着机械合金化转速的增加, 熔覆层硬度具有最大值, 磨损量具有最小值, 转速为300 r/min时, 熔覆层的硬度最高, 约为基板的2倍。

Abstract

CNTs-SiC-Ni composite cladding coating were fabricated by laser cladding with mechanical alloying modified composite powders. The effects of mechanical alloying on the microhardness and antiwear properties of composite cladding were studied. The results show that with the increasing mechanical alloying speed, the encapulsated area on the nickel particle grows at the exponential rate and keeps constant on the 350r/min mechanical alloying, the nickel powder, SiC particle and CNTs mix evenly. When the mechanical alloying speed is 300r/min, the fine core-shell (CNTs-SiC)/Ni composite particle is obtained, the microhardness of the cladding gets the peak value, the mass wear of the cladding has the minimium value.

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赵明娟, 舒豹增, 吴涛, 刘德佳, 赵龙志, 唐延川, 胡勇, 宋立军. 机械合金化对CNTs-SiC-Ni激光熔覆涂层力学性能的影响[J]. 应用激光, 2019, 39(5): 792. Zhao Mingjuan, Shu Baozeng, Wu Tao, Liu Dejia, Zhao Longzhi, Tang Yanchuan, Hu Yong, Song Lijun. Effect ofMechanical Alloying on Mechanical Properties of CNTs - SiC -Ni laser Cladding Coating[J]. APPLIED LASER, 2019, 39(5): 792.

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