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首页> 外文会议>International Thermal Spray Conference >Behavior of HVOF WC-10Co4Cr Coatings with Different Carbide Size in Fine and Coarse Particle Abrasion
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Behavior of HVOF WC-10Co4Cr Coatings with Different Carbide Size in Fine and Coarse Particle Abrasion

机译：HVOF WC-10CO4CR涂层具有不同碳化物尺寸的HVOF WC-10CO4CR涂层的特性和粗颗粒磨损

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摘要

A modified ASTM G 65 rubber wheel test was employed in wet and dry conditions using 220nm titania particles and 368μm sand particles, respectively. Both tests were conducted on WC-CoCr coatings produced with two powders with different carbide grain sizes (conventional and sub-micron) to address the effect of carbide size and abrasive medium characteristics on the wear performance. The same spot before and after the wet abrasion wear testing was analyzed in detail using SEM to visualize wear mechanisms. It was shown that the wear mechanism depends on the relative size of the carbide and abrasive particles. Wear mechanisms in dry sand abrasion were studied by analyzing the single scratches formed by individual abrasive particles. Interaction of surface open porosity with moving abrasive particles causes formation of single scratches. By tailoring the carbide size, the wear performance can be improved.
机译：使用220nm二氧化钛颗粒和368μm砂颗粒，在湿和干燥条件下使用改性的ASTM G 65橡胶轮试验。两种测试都在用两种粉末制备的WC-COCR涂层上进行，其具有不同的碳化物晶粒尺寸（常规和亚微米），以解决碳化物尺寸和磨料介质特性对磨损性能的影响。使用SEM详细分析湿磨损磨损测试之前和之后的同一个点，以便可视化磨损机制。结果表明，磨损机构取决于碳化物和磨料颗粒的相对尺寸。通过分析由个体磨料颗粒形成的单个划痕来研究干砂磨损机制。表面开放孔隙率与移动磨料颗粒的相互作用导致形成单个划痕。通过剪裁碳化物尺寸，可以提高磨损性能。

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