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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Load on Friction-Wear Behavior of HVOF-Sprayed WC-12Co Coatings
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Effect of Load on Friction-Wear Behavior of HVOF-Sprayed WC-12Co Coatings

机译：负荷对HVOF喷涂WC-12CO涂层磨损行为的影响

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摘要

A WC-12Co coating was sprayed on AISI H13 hot work mold steel using a high-velocity oxygen fuel. The morphologies, phase compositions, and distributions of chemical elements of the obtained coatings were analyzed using a field emission scanning electron microscope, x-ray diffraction, and energy-dispersive spectroscope (EDS), respectively. The friction-wear behaviors under different loads were investigated using a reciprocating wear tester; the morphologies and distributions of the chemical elements of worn tracks were analyzed using a SEM and its configured EDS, respectively. The results show the reunited grains of WC are held together by the Co binder; the primary phases of the coating are WC, Co, and a small amount of W2C and W, owing to the oxidation and decarburization of WC. Inter-diffusion of Fe and W between the coating and the substrate is shown, which indicates a good coating adhesion. The values of the average coefficient of friction under the loads of 40, 80, and 120 N are 0.29, 0.31, and 0.49, respectively. The WC grains are pulled out of the coating during the sliding wear test, but the coating maintains its integrity, suggesting that the coating is intact and continuously protects the substrate from wearing.
机译：使用高速氧气燃料喷洒在AISI H13热工作模具钢上的WC-12CO涂层。使用场发射扫描电子显微镜，X射线衍射和能量分散光谱（EDS）分析所得涂层的化学元素的形态，相组合物和分布。使用往复磨损测试仪研究不同载荷下的摩擦磨损行为;使用SEM及其配置的EDS分别分析磨损轨道的化学元素的形态和分布。结果表明，CO粘合剂综合杂粮综合组合在一起;由于WC的氧化和脱碳，涂层的初级相是WC，CO和少量W2C和W.示出了涂层和基板之间的Fe和W的间扩散，其表示良好的涂层粘附。在40,80和120n的载荷下平均摩擦系数的值分别为0.29,0.31和0.49。在滑动磨损试验期间，WC晶粒被拉出涂层，但涂层保持其完整性，表明涂层完整并连续地保护基材。

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