Ni-P金刚石化学复合镀层制备及摩擦磨损性能分析

发布时间：2018-04-11 19:54

  本文选题：化学复合镀 + 金刚石微粉　； 参考：《表面技术》2017年09期

【摘要】：目的研究不同粒径微米金刚石对Ni-P金刚石化学复合镀层摩擦磨损性能的影响。方法选择出一组优良的Ni-P化学镀工艺参数,在镀液中分别加入不同粒径的金刚石微粒,制备含不同粒径微米级金刚石颗粒的化学复合镀层。用SEM和XRD,观察并分析了不同粒径金刚石对热处理前后Ni-P金刚石化学复合镀层微观形貌和组织结构的影响;通过硬度和摩擦磨损实验,研究了不同粒径金刚石颗粒对复合镀层硬度及摩擦磨损性能的影响。结果制备的复合镀层厚度为30μm左右,金刚石质量分数达到21%~25%,且金刚石均匀分散在Ni-P镀层中。热处理前镀层为非晶结构,经过400℃×2 h的热处理后,镀层晶化为硬度更高的Ni3P。金刚石能提高镀层硬度,其中粒径为9μm的复合镀层硬度最高,达到1261HV。Ni-P金刚石复合镀层的摩擦系数为0.4~0.52,随着金刚石粒径的增大,摩擦系数不断减小。金刚石使镀层的磨损机制发生了变化,随着金刚石粒径的增大,硬质合金球的磨损加剧。结论随着金刚石粒径的增大,镀层硬度增加,摩擦系数减小,耐磨性增大。
[Abstract]:Objective to study the effect of different diameters of micron diamond on the friction and wear properties of Ni-P diamond electroless composite coating.Methods A group of excellent Ni-P electroless plating process parameters were selected, diamond particles with different diameters were added to the bath to prepare the electroless composite coatings containing different micrometer diamond particles.The effect of diamond particle size on the microstructure and microstructure of Ni-P diamond electroless composite coating before and after heat treatment was observed and analyzed by SEM and XRD.The effect of diamond particle size on the hardness and friction and wear properties of composite coating was studied.Results the thickness of the composite coating was about 30 渭 m, the diamond mass fraction reached 21 ~ 25 and the diamond was evenly dispersed in the Ni-P coating.The coating was amorphous before heat treatment. After heat treatment at 400 鈩，

本文编号：1737445