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Impact Wear of the Protective Cr3C2-Based HVOF-Sprayed Coatings

机译:Cr3C2基HVOF喷涂保护涂层的冲击磨损

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摘要

High velocity oxygen-fuel (HVOF) prepared CrC-based hardmetal coatings are generally known for their superior wear, corrosion, and oxidation resistance. These properties make this coating attractive for application in industry. However, under some loading conditions and in aggressive environments, the most commonly used NiCr matrix is not sufficient. The study is focused on the evaluation of dynamic impact wear of the HVOF-sprayed Cr C -25%NiCr and Cr C -50%NiCrMoNb coatings. Both coatings were tested by an impact tester with a wide range of impact loads. The Wohler-like dependence was determined for both coatings’ materials. It was shown that, due to the different microstructure and higher amount of tough matrix, the impact lifetime of the Cr C -50%NiCrMoNb coating was higher than the lifetime of the Cr C -25%NiCr coating. Differences in the behavior of the coatings were the most pronounced at high impact loads.
机译:众所周知,高速氧燃料(HVOF)制备的CrC基硬质合金涂层具有出色的耐磨性,耐腐蚀性和抗氧化性。这些性能使这种涂料在工业上具有吸引力。但是,在某些负载条件下以及在侵蚀性环境下,最常用的NiCr基体是不够的。该研究的重点是评估HVOF喷涂的Cr C -25%NiCr和Cr C -50%NiCrMoNb涂层的动态冲击磨损。两种涂层均由具有广泛冲击载荷的冲击测试仪测试。两种涂料的材料都具有类似Wohler的依赖性。结果表明,由于不同的微观结构和较高的韧性基体含量,Cr C -50%NiCrMoNb涂层的冲击寿命高于Cr C -25%NiCr涂层的寿命。在高冲击载荷下,涂层性能的差异最为明显。

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