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在AISI 4140基体上采用预置材料激光熔敷的方法制备了镍石墨烯立方氮化硼(Ni-GrapheneCBN)复合材料涂层。X射线衍射(XRD)和Raman测试证明了石墨烯和CBN存在于所制备的涂层材料中。扫描电镜(SEM)图片给出了所制备的复合材料涂层的表面和断面形貌。进行了复合材料涂层的纳米机械性能和耐磨性的测试。测试结果表明:随着CBN含量的增加,复合涂层的硬度及弹性模量相应提高,分别由4.3GPa提高到6.2GPa和101GPa提高到140GPa;同时其耐磨性也有明显改善,6%CBN含量的涂层摩擦系数由基体材料的0.2降低到0.15,最大磨损量降到基体磨损量的一半。
Ni-GrapheneCBN composite coating was prepared on the AISI 4140 substrate by laser cladding. X-ray diffraction (XRD) and Raman tests demonstrated that graphene and CBN were present in the prepared coating materials. Scanning electron microscopy (SEM) images show the surface and cross-sectional morphology of the prepared composite coatings. The nano-mechanical properties and wear resistance of the composite coatings were tested. The results show that with the increase of CBN content, the hardness and elastic modulus of the composite coatings increase correspondingly from 4.3 GPa to 6.2 GPa and from 101 GPa to 140 GPa, respectively. At the same time, the wear resistance of the composite coating is also significantly improved. The content of 6% CBN The coefficient of friction of the coating is reduced from 0.2 of the base material to 0.15, and the maximum amount of wear is reduced to half that of the substrate.