P110油管钢表面镀Cu与镀Ni-P摩擦磨损性能的比较

在P110油管钢表面分别制备了Cu镀层和Ni-P镀层,采用SEM、EDS和STM等方法对比研究了P110油管钢基体、Cu镀层和Ni-P镀层的摩擦磨损性能,分析了磨痕形貌、磨损率和摩擦系数的异同,探讨了磨损机理.结果表明:Cu镀层和Ni-P镀层的耐磨性均明显优于P110油管钢基体,且Ni-P镀层的耐磨性优于Cu镀层;P110油管钢基体的磨痕呈磨坑形貌,磨损机理为剥层磨损和磨粒磨损;Cu镀层的磨痕表面附着Cu磨屑,磨屑受压发生塑形变形,磨损机理为疲劳磨损和黏着磨损;Ni-P镀层的磨痕呈细小的犁沟形貌,磨损机理为轻微磨粒磨损.

Comparison on Tribological Properties between Cu Coating and Ni-P Coating on P110 Oil Tube Steel Substrate

Cu and Ni-P coatings on the P110 steel's substrate were deposited. The tribological properties of P110 substrate, Cu coating and Ni-P coating were comparatively investigated. The morphologies of the wear scar were analyzed by using scanning electron microscopy, energy dispersive spectroscopy and scanning tunneling microscopy and the wearing mechanism was discussed. The results show that the wear resistance of the two kinds of coatings was significantly improved as compared to that of P110 substrate. The wear resistance of Ni-P coating was better than that of Cu coating. The flaking pit was observed on the wear scar of P110 substrate, and the wear mechanisms were delamination and abrasive wear. In case of Cu coating, plastic deformation caused by adherent copper debris under compression was found on the wear scar and the wear mechanisms were fatigue and adhesive wear. The grooves on the wear scar of the Ni-P coating indicated mild abrasive wear.