超音速等离子喷涂Mo涂层的性能
Properties of Mo coatings prepared by supersonic plasma spraying
杨忠须 1刘贵民 1王海军 2闫涛1
作者信息
- 1. 装甲兵工程学院装备再制造工程系,北京100072
- 2. 装甲兵工程学院再制造技术国防科技重点实验室,北京 100072
- 折叠
摘要
以45 ～ 96 μm纯Mo粉为喷涂粉末,在两种喷涂参数下采用超音速等离子喷涂工艺在45CrNiMoVA钢表面制备了均匀致密、氧化量极少的Mo涂层,研究了不同参数下涂层微观结构、显微硬度、结合强度及耐磨性.结果表明,喷涂功率和气体流量略大的1号涂层各项性能均优于2号涂层.1号涂层的显微硬度为354 HV0.1,内聚强度为35 MPa;拉伸断口呈"微凹坑"、"微凸起"及塑性断裂后留下的微皱褶;10 N干摩擦下涂层磨损率高于基体,为粘着磨损机理,50 N润滑条件下涂层磨损率是基体的1/3,为磨粒磨损机理.
Abstract
Mo coatings on 45CrNiMoVA steel surface were prepared by supersonic plasma spraying under different spray parameters with the spray material of 45-96 μm Mo powder, and the Mo coatings with uniform and dense microstructure with few oxidation were obtained.The microhardness, bonding strength and wear resistance of the coatings were studied.The results show that the Mo coating (No.1) prepared by high praying power and gas flow exhibits a better comprehensive performance.The average microhardness and cohesion strength of the coating No.1 are 354 HV0.1 and 35 MPa, and micro pits, micro bulges and micro goffers resulted by plastic fracture are observed on the fracture surface.The wear rate of the coating No.1 is higher than that of 45CrNiMoVA steel under the load of 10 N without lubrication, and the wear mechanism is adhesive wear, while the wear rate is 1/3 of that of 45CrNiMoVA steel when the load is 50 N with lubrication, which belongs to abrasive wear mechanism.
关键词
超音速等离子喷涂/Mo涂层/断口/耐磨性Key words
supersonic plasma spray/Mo coating/fracture morphology/wear resistance引用本文复制引用
基金项目
北京市自然科学基金(2152031)
再制造技术国防重点实验室基金(9140C8502010C85)
出版年
2015
NETL
NSTL
维普
万方数据