Cermets have been widely used in industry to combat wear and erosion because of their elevated strength and hardness and good wear resistance. This study investigated the tribological properties of WC-6Ni (YN6X), WC-6Co (YG6X), and WC-TiC-Co–Ni (TiCN) cermets during sliding over silicon carbide (SiC) in prepared seawater. Tribological experiments of 440C and GCr15 steel coupled with SiC were conducted for comparison. The influence of sliding speed was examined by multiple sequential increases in speed from 0.1 to 0.4 m s⁻¹. The results showed that the tribological properties of the tribopairs were enhanced with growing sliding speed and were influenced by complex factors including material hardness, wear radius, the lubricating medium environment, and the tribochemical reaction. YN6X performed particularly well due to its high hardness and presence of Ni which effectively reduced the corrosion effect of seawater. However, YG6X showed better wear resistance relative to YN6X in tap water due to its higher hardness. In particular, through an investigation of the wear process of the tribopairs in seawater, this study proposed the coefficient of friction model for cermet/SiC. The results indicated that a combination of YN6X/SiC has excellent potential for application to seawater hydraulic components.

Graphical Abstract

中文翻译：

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滑动速度对金属陶瓷和钢球对海水润滑的SiC滑动摩擦学性能的影响

金属陶瓷由于具有较高的强度和硬度以及良好的耐磨性，因此已在工业上广泛用于抵抗磨损和侵蚀。这项研究调查了在准备好的海水中在碳化硅（SiC）上滑动过程中WC-6Ni（YN6X），WC-6Co（YG6X）和WC-TiC-Co-Ni（TiCN）金属陶瓷的摩擦学性能。比较了440C和GCr15钢与SiC的摩擦学实验，以进行比较。通过从0.1到0.4 ms ^-1的多个连续速度增加来检查滑动速度的影响。结果表明，摩擦副的摩擦学性能随滑动速度的增加而增强，并受材料硬度，磨损半径，润滑介质环境和摩擦化学反应等复杂因素的影响。YN6X由于其高硬度和镍的存在而表现特别出色，有效地降低了海水的腐蚀作用。然而，由于YG6X的硬度较高，因此相对于YN6X在自来水中显示出更好的耐磨性。特别是，通过研究海水中摩擦副的磨损过程，该研究提出了金属陶瓷/ SiC的摩擦系数模型。结果表明，YN6X / SiC的组合具有极好的潜力，可用于海水液压组件。

图形概要