中国激光, 2017, 44 (12): 1202004, 网络出版: 2017-12-11
铜板表面激光熔覆Ni-Mo-Si涂层的组织和微观力学性能
Microstructure and Micromechanical Features of Ni-Mo-Si Coatings on Copper Plate Surfaces by Laser Cladding
激光技术 激光熔覆 耐磨性 laser technique laser cladding MoSi2 MoSi2 Mo5Si3 Mo5Si3 Mo2Ni3Si Mo2Ni3Si wear resistance
摘要
利用激光熔覆技术, 在铜基体表面制备了三种Ni-Mo-Si复合材料涂层, 对三种涂层的相组成与组织进行了研究, 利用压痕法研究了涂层硬度与韧性。研究结果表明, 三种涂层的相组成分别为MoSi2+Ni2Si+γ-Ni(涂层1,Ni-20Mo-40Si)、Mo5Si3+Ni2Si+γ-Ni(涂层2,Ni-30Mo-30Si)和Mo2Ni3Si+Moss+γ-Ni(涂层3,Ni-40Mo-20Si)。涂层1的平均硬度为1100 HV, 平均摩擦系数为0.44; 涂层2的平均硬度为1200 HV, 断裂韧性较差, 平均摩擦系数为0.50; 涂层3的平均硬度为860 HV, 断裂韧性较好, 平均摩擦系数为0.55。涂层1~3的磨痕深度依次为6.30, 5.26, 7.00 μm。
Abstract
By using the laser cladding technique, three kinds of Ni-Mo-Si coatings are prepared on copper substrate surfaces. The phase compositions and microstructures of these coatings are researched, and the hardness and toughness of these coatings are studied with the indentation method. The study results show that the phase compositions of three kinds of coatings are MoSi2+Ni2Si+γ-Ni (coating 1, Ni-20Mo-40Si), Mo5Si3+Ni2Si+γ-Ni (coating 2, Ni-30Mo-30Si), and Mo2Ni3Si+Moss+γ-Ni(coating 3, Ni-40Mo-20Si), respectively. The average hardness of coating 1 is 1100 HV and its average friction coefficient is 0.44. The average hardness of coating 2 is 1200 HV and its average friction coefficient is 0.50, but its toughness of fracture is poor. The average hardness of coating 3 is 860 HV, its average friction coefficient is 0.55, and its toughness of fracture is good. The wear track depths for coatings 1-3 are 6.30, 5.26 and 7.00 μm, respectively.
李明川, 张培磊, 庄乔乔, 闫华, 于治水. 铜板表面激光熔覆Ni-Mo-Si涂层的组织和微观力学性能[J]. 中国激光, 2017, 44(12): 1202004. Li Mingchuan, Zhang Peilei, Zhuang Qiaoqiao, Yan Hua, Yu Zhishui. Microstructure and Micromechanical Features of Ni-Mo-Si Coatings on Copper Plate Surfaces by Laser Cladding[J]. Chinese Journal of Lasers, 2017, 44(12): 1202004.