High-velocity air fuel coatings for steel for erosion-resistant applications

Journal of Electrochemical Science and Engineering

article

Yasemin YıldıranAvcu¹  Mert Güney²  Egemen Avcu³ 

[1] Department of Mechanical Engineering, Natural and Applied Sciences, Kocaeli University;School of Engineering and Digital Sciences, Department of Civil and Environmental Engineering, The Environment & Resource Efficiency Cluster ,(EREC), Nazarbayev University;Ford Otosan Ihsaniye Automotive Vocational School, Kocaeli University

关键词: Thermal spraying;    high velocity air fuel (HVAF);    high velocity oxygen fuel (HVOF);    slurry erosion;    solid particle erosion;   

DOI  :  10.5599/jese.1369

学科分类：内科医学

来源: International Association of Physical Chemists (IAPC)

【 摘 要 】

High-velocity air fuel (HVAF) coating processes have advantages over conventional high-velocity oxygen fuel (HVOF) processes, resulting in coatings with superior properties. The present review first provides a concise overview of HVAF coatings, highlighting their advantages over HVOF coatings. Then, the fundamentals of solid particle, slurry, and cavitation erosion are briefly introduced. Finally, the performance of HVAF coatings for erosion-resistant applications is discussed in detail. The emerging research consistently reports HVAF-coatings having higher erosion resistance than HVOF-coatings, which is attributed to their elevated hardness and density and improved microstructural features that inhibit the surface damages caused by erosion. The dominant wear mechanisms are mainly functions of particle impact angle. For instance, the removal of the binder phase at high impact angles causes the accumulation of plastic strain on hard particles (e.g., WC particles) in the matrix, forming micro-cracks between the hard particles and the matrix, eventually decreasing the erosion resistance of HVAF coatings. The binder phase of HVAF-coatings significantly affects erosion resistance, primarily due to their inherent mechanical properties and bearing capacity of hard particles. Optimizing spraying parameters to tailor the microstructural characteristics of these coatings appears to be the key to enhancing their erosion resistance. The relationship between microstructural features and erosion mechanisms needs to be clarified to process coatings with tailored microstructural features for erosion-resistant applications.

【 授权许可】

CC BY