Cavitation erosion is a common mode of wear in flow control and fluid handling systems. To mitigate this degradation mode, CoCr superalloys or facing coatings are commonly used for flow control or pump parts. Cemented carbides, however, generally present wear resistance superior to that of those materials due to the favourable combination of their mechanical properties. In this study, the cavitation corrosion-erosion performance of cemented carbides with submicronic WC grain size was evaluated in a 3.5 wt% NaCl aerated solution at room temperature as a function of their binder volume (up to 20%) and chemistry (Co, Ni, and their combination). The effect of the addition of secondary (cubic) carbides (up to 11 vol%) on the performance of these materials was also assessed. Results showed that the cavitation erosion-corrosion resistance for these materials was controlled by the carbide contiguity and the binder chemistry. The cavitation erosion resistance increased linearly with the increase of the hardness (as well as H/E and H³/E² ratios) for the materials having a Ni/(Ni + Co) ratio > 60% and a HV30 > 1500. Such materials presented superior performances than the CoCr superalloy reference material.

气蚀是流量控制和流体处理系统中常见的磨损模式。为了减轻这种退化模式，CoCr 高温合金或表面涂层通常用于流量控制或泵部件。然而，硬质合金通常具有优于那些材料的耐磨性，因为它们具有良好的机械性能组合。在这项研究中，在室温下，在 3.5 wt% NaCl 充气溶液中评估了具有亚微米 WC 晶粒尺寸的硬质合金的空化腐蚀-侵蚀性能，作为其粘合剂体积（高达 20%）和化学（Co、Ni ，以及它们的组合）。还评估了添加二次（立方）碳化物（高达 11 vol%）对这些材料性能的影响。结果表明，这些材料的抗气蚀腐蚀能力受碳化物邻接和粘合剂化学成分的控制。Ni/(Ni + Co) 比 > 60% 和 HV30 > 1500 的材料具有³ /E ²比值。这些材料表现出比 Co Cr 超合金参考材料更优越的性能。