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将不同比例的WC/17Co与Ni60粉末进行混合,并采用氧乙炔火焰喷焊工艺制备了相应的涂层。分别用洛式硬度计和X衍射仪测试了各涂层的硬度和相结构;采用湿砂橡胶轮式磨粒磨损实验机对各涂层的抗磨粒磨损性能进行了测试,采用扫描电镜观察了喷焊粉末形貌和喷焊层的磨损形貌,并进行了能谱分析。结果表明,喷焊层的组织为在γ-Ni固溶体基体上弥散分布着细小的Cr7C3、Cr23C6、Cr2B、CrB2和WC等硬质相。喷焊层的硬度随WC/17Co添加量的增加先增加后减小,当WC的含量为25wt%时,喷焊涂层的硬度最高,相应的抗磨粒磨损性能最好。
Different proportions of WC / 17Co and Ni60 powders were mixed and the corresponding coatings were prepared by oxyacetylene flame spray process. The hardness and phase structure of each coating were tested by Rockwell hardness tester and X-ray diffractometer. The abrasion resistance of each coating was tested by a wet-sand rubber wheeled abrasive wear tester. Scanning electron microscopy The spray powder morphology and wear morphology of spray coating, and energy spectrum analysis. The results show that the microstructure of the sprayed layer is composed of fine Cr7C3, Cr23C6, Cr2B, CrB2 and WC dispersed in the γ-Ni solid solution matrix. The hardness of spray coating increases first and then decreases with the increase of WC / 17Co addition. When the content of WC is 25wt%, the hardness of spray coating is the highest, and the corresponding wear resistance is the best.