N + Cr ions were co-implanted into the carburized 18Cr2Ni4WA steel to improve hardness, wear and corrosion resistance. The microstructures of the samples were characterized by the glancing incidence X-ray diffractometer, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy, respectively. In addition, the mechanical, corrosion and tribological properties were evaluated by nano-indenter instrument, electrochemical corrosion workstation and wear test, respectively. The results showed that after implanting N + Cr ions, a new nano-nitride phase was formed on the surface of carburized steel. Ions implantation process was accompanied by the radiation damage, which led to lattice distortion on the surface of the steel. These changes accordingly made the N + Cr ions implantation layer present high nano-hardness. Meanwhile, the N + Cr ions implantation layer could effectively prevent the synergistic effect of corrosion and friction in seawater environment, and significantly enhance the tribological property of the carburized steels in simulated seawater.

将N + Cr离子共注入渗碳的18Cr2Ni4WA钢中，以提高硬度，耐磨性和耐腐蚀性。样品的微观结构分别由掠入射X射线衍射仪，X射线光电子能谱，扫描电子显微镜和透射电子显微镜表征。此外，分别通过纳米压头仪，电化学腐蚀工作站和磨损测试评估了机械，腐蚀和摩擦学性能。结果表明，注入N + Cr离子后，渗碳钢表面形成了新的纳米氮化物相。离子注入过程伴随着辐射损伤，从而导致钢表面的晶格畸变。这些变化因此使得N + Cr离子注入层呈现出高的纳米硬度。同时，N + Cr离子注入层可有效防止海水环境中腐蚀与摩擦的协同作用，并显着提高渗碳钢在模拟海水中的摩擦学性能。