镀液中二硫化钼添加量对镍-二硫化钼复合电镀层耐磨性的影响

Effect of molybdenum disulfide dosage in electrolyte on wear resistance of electroplated nickel–molybdenum disulfide composite coating

以MoS2作为增强相添加到由240 g/L NiSO4·6H2O、45 g/L NiCl2·6H2O、30 g/L H3BO3、20 g/L Na2SO4和0.2 g/L十六烷基三甲基溴化铵组成的镀液中,在45钢表面电沉积得到Ni-MoS2复合镀层。采用扫描电镜、X射线衍射仪和摩擦磨损试验仪考察了MoS2添加量对Ni-MoS2复合镀层的表面形貌、相结构和耐磨性的影响。随着MoS2添加量的增大,Ni-MoS2复合镀层表面凸起的胞状结构增多,显微硬度先增大后减小,摩擦因数降低。当MoS2的添加量为2 g/L时,所得Ni-MoS2复合镀层的显微硬度为860.5 HV,耐磨性较佳。

MoS2 particles were added as a reinforcement phase to the electrolyte comprising NiSO4·6H2O 240 g/L,NiCl2·6H2O 45 g/L,H3BO330 g/L,Na2SO420 g/L,and cetyltrimethylammonium bromide 0.2 g/L for electrodeposition of Ni-MoS2 composite coating on 45 steel surface.The effect of MoS2 dosage on the surface morphology,phase structure,and wear resistance of Ni-MoS2 composite coating were studied by scanning electron microscopy,X-ray diffraction,and friction and wear testing.The results showed that with the increasing of MoS2 dosage,the embossed cellular structures on the surface of Ni-MoS2 composite coating were increased,the microhardness was increased initially and then decreased,and the friction coefficient was decreased.The Ni-MoS2 composite coating obtained with a MoS2 dosage of 2 g/L in electrolyte features a microhardness of 860.5 HV and good wear resistance.