中国激光, 2018, 45 (11): 1102009, 网络出版: 2018-11-15
磁场辅助激光沉积复合涂层的微观组织与性能 下载: 728次
Microstructure and Properties of Composite Coatings by Magnetic Field Assisted Laser Deposition
激光技术 激光沉积 旋转磁场 显微组织 复合涂层 摩擦磨损 laser technique laser deposition rotating magnetic field microstructure composite coatings friction and wear
摘要
采用激光沉积技术,在304不锈钢表面制备了Fe106+5%Ni/WC复合涂层,研究了不同磁场转速下涂层的宏观形貌、微观组织、显微硬度及摩擦磨损性能的变化。结果表明,当磁感应强度为70 mT,磁场转速为100~400 r·min-1时,旋转磁场对沉积层表面粗糙度影响较小;当磁场转速继续增大时,沉积层表面粗糙度逐渐减小,熔宽逐渐增大,润湿角逐渐减小,表面质量明显提升。随着磁场转速的增大,沉积层的显微硬度逐渐增大。当磁场转速为600 r·min-1时,沉积层的平均显微硬度达到825 HV,约为无磁场沉积层的1.178倍;同时,沉积层的磨损质量逐渐减小,最小磨损平均失重仅为2.2 mg,比无磁场沉积层的耐磨性提高了1.33倍。
Abstract
The Fe106+5%Ni/WC composite coatings are prepared on the 304 stainless steel surfaces by the rotating magnetic field assisted laser deposition technique, and the changes of their macro-morphologies, microstructures, microhardness, and friction and wear properties under different magnetic field rotating speeds are investigated. The results show that, the rotating magnetic field has a small effect on the surface roughness of the deposition layer when the magnetic field strength is 70 mT and the magnetic field rotating speed is 100-400 r·min-1. With the further increase of the magnetic field rotating speed, the surface roughness of the deposition layer gradually decreases, the melt width increases, and the wetting angle gradually decreases, which indicates the surface quality is obviously improved. In addition, the microhardness of the deposition layer gradually increases with the increase of the magnetic field rotating speed. When the magnetic field rotational speed is 600 r·min-1, the average hardness microhardness of the deposition layer reaches 825 HV, which is about 1.178 times that of the magnetic field free deposition layer. Simultaneously, the wear quality of the deposition layer gradually decreases, and the minimum average weight loss is only 2.2 mg, which is 1.33 times higher than that of the magnetic field free deposition layer.
石岩, 陈奎明, 刘佳, 李凌宇, 姜志恒. 磁场辅助激光沉积复合涂层的微观组织与性能[J]. 中国激光, 2018, 45(11): 1102009. Shi Yan, Chen Kuiming, Liu Jia, Li Lingyu, Jiang Zhiheng. Microstructure and Properties of Composite Coatings by Magnetic Field Assisted Laser Deposition[J]. Chinese Journal of Lasers, 2018, 45(11): 1102009.