Richert Maria
Management Faculty, AGH University in Krakow, 30-067 Kraków, Poland.
Materials (Basel). 2024 Aug 7;17(16):3903. doi: 10.3390/ma17163903.
This paper presents a study on thermally sprayed coatings. Coatings produced by high-velocity oxygen-fuel spraying HVOF and plasma spraying deposited on the A03590 aluminum casting alloy are tested. The subject of this research concerns coatings based on tungsten carbide WC, chromium carbide CrC, composite coatings NiCrSiB + 2.5%Fe + 2.5%Cr, mixtures of tungsten and chromium powders WC-CrC-Ni, mixtures of carbide powders with the CrC-NiCr + the composite 5% NiCrBSi and WC-Co + 5% NiCrBSi. The aim of this research is to find a coating most resistant to the erosive impact of particles contained in the medium centrifuged by industrial rotors. The suitability of the coating is determined by its high level of microhardness. The hardest coatings are selected from the coatings tested and subjected to abrasion tests against a sand particle impact jet and the centrifugation of a medium with corundum particles. It is found that the most favorable anti-erosion properties are demonstrated by a coating composed of a mixture of tungsten carbide and chromium carbide WC-CrC-Ni powders. It is concluded that the greatest resistance of this coating to the erosive impact of the particle jet results from the synergistic enhancement of the most favorable features of both cermets.
本文介绍了一项关于热喷涂涂层的研究。对通过高速氧燃料喷涂(HVOF)和等离子喷涂制备的、沉积在A03590铝合金铸件上的涂层进行了测试。本研究的主题涉及基于碳化钨(WC)、碳化铬(CrC)的涂层、复合涂层NiCrSiB + 2.5%Fe + 2.5%Cr、钨粉与铬粉的混合物WC - CrC - Ni、碳化物粉末与CrC - NiCr的混合物以及复合涂层5% NiCrBSi和WC - Co + 5% NiCrBSi。本研究的目的是找到一种对工业转子离心介质中所含颗粒的侵蚀冲击最具抗性的涂层。涂层的适用性由其高显微硬度水平决定。从测试的涂层中选出最硬的涂层,并对其进行针对砂粒冲击射流和含有刚玉颗粒介质的离心的磨损试验。结果发现,由碳化钨和碳化铬粉末混合物WC - CrC - Ni组成的涂层表现出最有利的抗侵蚀性能。得出的结论是,该涂层对颗粒射流侵蚀冲击的最大抗性源于两种金属陶瓷最有利特性的协同增强。