摘要
采用化学复合镀工艺在钢基表面成功制备了Ni-P-Ti(CN)复合镀层,并对镀层进行热处理。通过光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍仪(XRD)和数显显微硬度计等手段分析镀层的表-断面形貌、物相组成和显微硬度;采用旋转摩擦实验,结合形貌观察与能谱分析(EDS)对比研究了基体、Ni-P镀层和Ni-P-Ti(CN)复合镀层的摩擦学性能,并阐述了镀层的磨损机理。结果表明:Ti(CN)微粒的共沉积和热处理能够明显提高镀层的显微硬度;热处理后Ni-P-Ti(CN)复合镀层的显微硬度值为1120HV,摩擦系数为0.23,磨损率为2.59×10-4 mm3·(N·m)-1,具有较优的摩擦学性能,Ni-P-Ti(CN)复合镀层和Ni-P镀层次之,复合镀层中弥散分布的Ti(CN)微粒对减小镀层摩擦系数和降低磨损率具有十分重要的作用。
In this study, Ni-P-Ti（CN） composite coating was successfully deposited on the surface of steel by electroless plating, and the coating was treated with heat treatment. Optical microscope （OM）, SEM, XRD and mi- cro-hardness tester were used to analyze the surface-section morphology, phase composition and micro-hardness of the coatings. The tribological properties and wear mechanisms of matrix, Ni-P coating and Ni-P-Ti（CN） composite coa- ting were studied by pin-on-disk testrig, morphology observation and energy dispersive spectrometer（EDS）. The re- sults show that the deposition of Ti（CN） particles and heat treatment can obviously increase the micro-hardness of the coatings. After heat treatment, the micro-hardness, friction coefficient and wear rate of the Ni-P-Ti（CN） composite coating were 1120HV, 0. 23 and 2. 59×10^-4 mm3 . （N · m） -1 respectively. It indicates that the tribological performances of heat treated Ni-P-Ti（CN） composite coating was superior to Ni-P-Ti（CN） composite coating and Ni-P coa- ting, and the Ti（CN） particles dispersed in the composite coating has a very active role in reducing the friction coeffi- cient and wear rate of the coating.
作者简介
杨永胜：男，1993年生，硕士生，研究方向为无机非金属材料E-mail：784154450@qq．com.
张进：通讯作者，男，1979年生，博士生，副教授，主要从事薄膜及涂层材料的制备与性能的研究E-mail：jzhang@swpu．edu．cn
