Daniel Josef, Grossman Jan, Houdková Šárka, Bystrianský Martin
Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 612 64 Brno, Czech Republic.
Research and Testing Institute in Plzeň, Tylova 46, 301 00 Plzeň, Czech Republic.
Materials (Basel). 2020 May 4;13(9):2132. doi: 10.3390/ma13092132.
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 CrC-25%NiCr and CrC-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 CrC-50%NiCrMoNb coating was higher than the lifetime of the CrC-25%NiCr coating. Differences in the behavior of the coatings were the most pronounced at high impact loads.
高速氧燃料（HVOF）制备的CrC基金属陶瓷涂层通常以其优异的耐磨性、耐腐蚀性和抗氧化性而闻名。这些性能使这种涂层在工业应用中具有吸引力。然而，在某些加载条件下和侵蚀性环境中，最常用的NiCr基体并不足够。该研究专注于评估HVOF喷涂的CrC-25%NiCr和CrC-50%NiCrMoNb涂层的动态冲击磨损。两种涂层都通过具有广泛冲击载荷的冲击试验机进行测试。确定了两种涂层材料的类似沃勒曲线的相关性。结果表明，由于微观结构不同且韧性基体含量较高，CrC-50%NiCrMoNb涂层的冲击寿命高于CrC-25%NiCr涂层。涂层行为的差异在高冲击载荷下最为明显。
