【摘要】 本文对Q235钢表面先后实施化学共沉积和热处理形成Ni-P-BN（h）复合镀层,利用电子探针显微分析仪、X射线衍射仪、扫描电镜和硬度计,研究了热处理和镀液中六方氮化硼BN（h）含量对复合镀层自润滑性能和硬度的影响。结果表明,镀液中BN（h）颗粒浓度变化对镀层中P含量的影响不大;镀层经热处理后,在表面形成体心立方Ni₃P,增大了表面硬度,有利于发挥BN（h）的润滑作用,从而有效减小镀层表面的摩擦系数;经热处理的Ni-P-BN（h）-7.5复合镀层属于自润滑性镀层,11500 cm磨损试验中平均摩擦系数仅为0.26,且摩擦系数波动较小。更多还原

【Abstract】 In this paper,chemical co-precipitation and subsequent heat treatment were applied to the surface of Q235 steel to form a Ni-P-BN（h）composite coating. The effects of heat treatment and BN（h）content in the plating solution on the self-lubricating property and hardness of the composite coating were studied by EPMA,XRD,SEM and hardness tester. The results show that the concentration change of BN（h）particles in the plating solution has little effect on the P content in the coating. After heat treatment,Ni₃P is formed on the surface of the coating,which increases the surface hardness,promotes BN（h）to play a lubricating role,thereby effectively reduces the friction coefficient of the coating surface. The heat-treated Ni-P-BN（h）-7.5 composite coating belongs to self-lubricating coating,of which the average friction coefficient in 11500 cm wear test is only 0.26,and the friction coefficient fluctuation is relatively small.更多还原