Ni-P-SiC-MoS_2化学复合镀层的组织结构及耐磨性能

Microstructure and Wear Resistance of Electroless Ni-P-SiC-MoS_2 Composite Coaing

在Ni-P化学镀液中添加第二相粒子可提高镀层性能,但目前已有的此类研究中镀层性能还不甚理想。在35CrNi钢基体上沉积了Ni-P-SiC-MoS2复合镀层,借助扫描电镜(SEM)、能谱仪、显微硬度计、磨损试验机等分析了复合镀层的表面形貌、成分、硬度及耐磨性。结果表明:Ni-P-SiC-MoS2镀层为非晶态结构;镀层硬度随SiC和MoS2混合微粒含量的增加而增加,随热处理温度的升高先升后略降;添加SiC和MoS2的混合微粒6g/L的镀层摩擦磨损性能最好。

Electroless NiPSiCMoS2 composite coating was deposited on 35CrNi steel substrate by introducing SiC and MoS2 particulates into electroless NiP bath.The surface morphology and elemental composition of asplated composite coating were observed with a scanning electron microscope and an energy dispersive spectrometer,and its hardness and wear resistance were evaluated with a microhardness meter and a friction and wear tester.It was found that asplated NiPSiCMoS2 composite coating had amorphous structure.The hardness of NiPSiCMoS2 composite coating rose with increasing content of SiC and MoS2 particulates,but rose initially and slightly declined later with elevating heattreatment temperature.Moreover,the NiPSiCMoS2 composite coating obtained from the plating bath containing 6 g/L particulates consisted of SiC and MoS2 had the best wear resistance.