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首页> 外文期刊>Journal of Materials Engineering and Performance >Sliding and Abrasive Wear Behavior of WC-CoCr Coatings with Different Carbide Sizes
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Sliding and Abrasive Wear Behavior of WC-CoCr Coatings with Different Carbide Sizes

机译：不同碳化物尺寸的WC-CoCr涂层的滑动和磨料磨损行为

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摘要

This study examines the sliding and abrasive wear behaviors of high-velocity oxy-fuel (HVOF)-sprayed WC-CoCr coatings with different WC grain sizes. The HVOF coating deposition was assisted by in-flight particle temperature and velocity measurement system. The powder feedstocks and their corresponding coatings were characterized by means of XRD and Field Emission Scanning Electron Microscope analysis. Hardness, porosity, and indentation fracture toughness of these coatings were calculated and compared with each other. Sliding wear resistance of these coatings was calculated using pin-on-disk tribometer (ASTM G99-90). The two-body abrasion was quantified by sliding the samples over silicon carbide (SiC) abrasive paper bonded to a rotating flat disk of auto-polisher. The mechanism of materials' removal in both the sliding and abrasive wears was studied and discussed on microstructural investigations. It was observed that fine grain WC-CoCr cermet coating exhibits higher sliding and abrasive wear resistances as compared with conventional cermet coating.
机译：这项研究检查了不同的WC晶粒尺寸的高速含氧燃料（HVOF）喷涂的WC-CoCr涂层的滑动和磨料磨损行为。机载粒子温度和速度测量系统辅助HVOF涂层沉积。通过XRD和场发射扫描电子显微镜分析对粉末原料及其相应的涂层进行表征。计算并比较了这些涂层的硬度，孔隙率和压痕断裂韧性。这些涂层的滑动耐磨性是使用针盘摩擦计（ASTM G99-90）计算的。通过将样品在粘结到自动抛光机旋转平盘上的碳化硅（SiC）砂纸上滑动来量化两件式磨损。研究了材料在滑动磨损和磨料磨损中的去除机理，并在微观结构研究中进行了讨论。观察到，与常规金属陶瓷涂层相比，细晶粒的WC-CoCr金属陶瓷涂层表现出更高的耐滑动性和耐磨性。

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