微/纳米复合涂层的抗冲蚀磨损性能

Erosion Resistance of Micro/Nano Composite Coating

为了修复在冲蚀磨损环境下流体机械的过流部件,在分析过流部件冲蚀磨损机理的基础上,优选微/纳米颗粒填料对有机复合弹性涂层的黏性底层和抗冲蚀橡胶层进行优化设计,模拟现场工况利用转盘式磨损实验装置对涂覆该涂层的试件以及另外四种不同表面处理方法的试件进行耐冲蚀磨损性能实验,并采用失重法和扫描电镜(SEM)对冲蚀磨损结果进行了分析和对比。结果表明:经过35h的冲蚀磨损后,所研究的五种不同表面处理方法处理后的试件在冲蚀磨损过程中的质量变化规律相同,微/纳米复合涂层具有最佳的耐冲蚀磨损性能,基本没有失重,而用胎体粉涂覆的试件耐冲蚀磨损性能最差,说明该涂层能有效修复过流部件并提高过流部件的抗冲蚀磨损能力。

In order to repair the flow parts of the fluid machinery under erosive wear environment, based on the basis of the erosive wear mechanism, the viscous sub-layer and anti-erosion coating o{ organic compound elastomeric coating were optimized by selecting micro/nano particles. Erosion resistance test was carried out with the coating of the specimen, as well as four different surface treat- ment methods by using rotary abrasion test device coated in simulated working conditions. Erosion wear results were analyzed and compared by using mass loss method and SEM. The results show that after 35h erosion wear test, the specimen mass of five different surface treatment methods in the process of erosion wear has the similar variation, the micro/nano composite coating has the best ero- sion resistance, basically no mass loss. The erosion resistance of matrix powder coated specimens is the worst. The coating can effectively repair the parts of the over-current and improve the flow com- ponents erosion resistance.