钴基合金-碳化钨复合涂层材料耐磨性能的研究

采用真空熔烧法制得钴基合金—碳化钨复合涂层材料,借助扫描电子显微镜、X射线衍射仪等先进的测试手段对涂层的组织结构和表面形貌进行观察分析。应用盘销式摩擦磨损试验机对不同碳化钨质量分数的复合涂层材料和淬火态45钢进行了磨损试验。结果表明:在相同试验条件下,复合涂层的耐磨性显著高于淬火钢,且其耐磨性随碳化钨质量分数的增加而提高:淬火钢的耐磨性随着载荷的增加迅速降低,而复合涂层的耐磨性则变化不大。

STUDY ON WEAR RESISTANCE OF VFS COBALT BASED ALLOY TUNGSTEN CARBIDE COMPOSITE COATING MATERIALS

The WC-Co composite coating bonded strongly with steel matrix is made by vacuum fusion sintering (VFS). The constitution structure and the morphology of the composite coating are observed and analyzed by SEM, X-ray diffraction meter and micro-hardness instrument. A series of experiments on the cobalt based composite coatings of the different tungsten carbide percent are fulfilled by a pin-on-disc abrasion machine. The results show that the wear resistance of the cobalt based composite coatings are prior to that of the 45 hardened steel, and that the higher the tungsten carbide percent, the better the wear resistance; The wear resistance of the hardened steel de- creases greatly whereas that of the composite coating varies slightly when the load increases.