中国激光, 2018, 45 (5): 0502002, 网络出版: 2018-05-21
SiC颗粒尺寸对TiNi基熔覆层组织与性能的影响 下载: 799次
Effects of SiC Particle Size on Microstructures and Properties of TiNi Based Cladding Layers
激光技术 激光熔覆 钛合金涂层 SiC颗粒尺寸 微观组织 耐磨性 laser technique laser cladding titanium alloy coating SiC particle size microstructure wear resistance
摘要
采用激光熔覆技术在TC21钛合金表面熔覆了含有SiC颗粒的复合涂层, 研究了SiC颗粒尺寸对熔覆层物相组成、微观组织、硬度及摩擦磨损性能的影响。结果表明, 熔覆层中的主要物相为Ti2Ni、TiNi、Ti5Si3和TiC;TiC颗粒起到细化晶粒的作用;添加微米SiC颗粒后的熔覆层表面硬度和耐磨性分别为基体的2.1倍和2.082倍, 而添加纳米SiC颗粒后的熔覆层表面硬度和耐磨性分别为基体的2.4倍和1.475倍。
Abstract
Composite coatings including TiC particles are fabricated on the TC21 titanium alloy surface by the laser cladding process. The effects of SiC particle size on the phase compositions, microstructures, hardness, friction and wear properties of the cladding coatings are investigated. The results show that the main phases of the cladding coatings are Ti2Ni, TiNi, Ti5Si3 and TiC and the TiC particles refine the grain size. The addition of micro-SiC particles makes the hardness and the wear resistance of the cladding coating surface increase to 2.1 and 2.082 times that of the matrix, respectively, in contrast, the addition of nano-SiC makes them increase to 2.4 times and 1.475 times, respectively.
孙琳, 位超群, 隋欣梦, 陈卓, 张维平. SiC颗粒尺寸对TiNi基熔覆层组织与性能的影响[J]. 中国激光, 2018, 45(5): 0502002. Sun Lin, Wei Chaoqun, Sui Xinmeng, Chen Zhuo, Zhang Weiping. Effects of SiC Particle Size on Microstructures and Properties of TiNi Based Cladding Layers[J]. Chinese Journal of Lasers, 2018, 45(5): 0502002.