激光与光电子学进展, 2018, 55 (4): 041404, 网络出版: 2018-09-11   

激光重熔轨迹对Fe基Ni/WC涂层组织和性能的影响 下载: 1035次

Influences of Laser Remelting Trajectories on Microstructures and Properties of Fe-Based Ni/WC Coatings
作者单位
江西理工大学机电工程学院, 江西 赣州 341000
摘要
通过等离子喷涂方法在45 #钢表面涂覆了Fe基Ni/WC金属陶瓷涂层,采用4种激光重熔轨迹对涂层进行了重熔处理,分析了激光重熔轨迹对涂层组织和性能的影响。结果表明,圆形激光重熔轨迹对涂层性能改善效果最显著,在对流传质作用下基体和重熔层之间发生元素转移,基体与重熔层之间的结合方式由机械结合转变为冶金结合;WC、W2C等硬质相在熔覆层中起到弥散强化作用,圆形激光重熔轨迹涂层的显微硬度和磨损失重分别是打点激光重熔轨迹涂层的1.4倍和33.7%;圆形激光重熔轨迹涂层中的孔隙率最小。
Abstract
The Fe-based Ni /WC cermet coatings are covered on the surface of 45 # steels by the plasma spraying technique, the coatings are remelted under four laser remelting trajectories, and the influences of laser remelting trajectories on the microstructure and properties of the coatings are investigated. The results show that the circular laser remelting trajectory exerts the most obvious improvement on the coating properties. The element transfer occurs between the substrate and the remelted layers under the action of convective mass, and the combination mode between the substrate and the remelted layers changes from mechanical bonding to metallurgical bonding. WC, W2C and other hard phases play the role of dispersion-strengthening in the cladding layer. The micro-hardness and wear loss of the coatings under the circular laser remelting trajectories are 1.4 times and 33.7% of those under dotted laser remelting trajectories, respectively. The porosity of the coating under the circular laser remelting trajectories is the lowest.

赵运才, 杜辉辉, 上官绪超, 何文. 激光重熔轨迹对Fe基Ni/WC涂层组织和性能的影响[J]. 激光与光电子学进展, 2018, 55(4): 041404. Yuncai Zhao, Huihui Du, Xuchao Shangguan, Wen He. Influences of Laser Remelting Trajectories on Microstructures and Properties of Fe-Based Ni/WC Coatings[J]. Laser & Optoelectronics Progress, 2018, 55(4): 041404.

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