超音速微粒沉积镍基合金涂层的微观结构与摩擦磨损行为  

Microstructure and friction behavior of nickel-based coating prepared by supersonic particles deposition

作　　者：王晓明[1] 周超极 朱胜[1] 王启伟[1] 张垚[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国家重点实验室,北京100072

出　　处：《粉末冶金材料科学与工程》2016年第2期282-288,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(50975286);国家自然科学基金资助项目(51205408);部委基金资助项目(JJ1202)

摘　　要：为提高再制造铜制衬套的耐磨损性能,运用超音速微粒沉积技术在铜合金基体表面制备镍基合金涂层,采用SEM,XRD和EDS等试验仪器表征涂层的组织、相结构以及氧含量等,运用显微硬度仪、拉伸试验机和CETR摩擦磨损试验机等试验设备分析涂层的力学性能和摩擦学性能。结果表明:超音速微粒沉积镍基合金涂层表面平整,结构致密,孔隙率低(0.4%),涂层与基体结合良好,结合强度达52.8 MPa,涂层平均显微硬度HV0.2为703(较基体提高7倍以上),磨损体积仅为基体的1.48%,对提高再制造铜制衬套的使用寿命具有重要意义。In order to improve anti-wear properties of remanufactured copper bush, Ni-based alloy coatings on the copper were prepared by supersonic particle deposition method. The microstructure, phase structure and oxygen content of the coating were analyzed by SEM, XRD and EDS. The mechanical properties were tested on a tensile testing machine and a hardness indenter. The wear resistance was investigated by CETR wear tester. The results show that the surface of the coating is smooth with an average micro-hardness HV0.2 of 703, which is about 7 times of the substrate, and the cross-section has a densified structure with porosity of 0.4%. The bonding between the coating and the substrate is contact with a strength of 52.8 MPa. The volume of cracks in the coating is only 1.48% of the substrate, and it is of vital significance for Ni-based alloy coatings to improve the service life of the remanufactured copper bush.

关 键 词：超音速微粒沉积 镍基合金涂层 摩擦磨损 铜衬套 微观结构 

分 类 号：TF124.212[冶金工程—粉末冶金]