CAVITATION EROSION BEHAVIOR OF WC–Co COATINGS ON TURBINE STEEL DEPOSITED BY COLD SPRAY

Harvinder Singh, Manoj Kumar and Rajdeep Singh
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Harvinder Singh: Department of Mechanical Engineering, Chandigarh University Gharuan, Punjab, India†Department of Mechanical Engineering, Chandigarh Group of Colleges, Landran Mohali Punjab, India
Manoj Kumar: Department of Mechanical Engineering, Chandigarh University Gharuan, Punjab, India
Rajdeep Singh: ��Department of Mechanical Engineering, Chandigarh Group of Colleges, Landran Mohali Punjab, India

Surface Review and Letters (SRL), 2025, vol. 32, issue 12, 1-12

Abstract: A renowned hard coating material (WC–Co) has the potential to overcome cavitation erosion (CE) in hydromachinery components. Hydro turbines that employ silt-filled water for electricity generation create a lot of metal waste due to erosion and cavitation caused by the particles. There is an urgent need for repair of hydropower components that have undergone damage due to cavitation. In this investigation, tungsten carbide composite coatings were produced on 13Cr4Ni (CA6NM) stainless steel substrates using the cold spray method. In order to create high-quality coatings, nitrogen was used as the propellant gas. The coating microstructures were characterized by EDS, SEM XRD, and microhardness tests. Cold-sprayed WC–Co-based coatings were exposed to enhance the cavitation erosion resistance of CA6NM steel. Cold spray coating prepared with WC-12/17Co powder has shown excellent wear-resistant properties due to higher hardness and lower porosity.

Keywords: Cold spray process; WC-12/17Co powder; cavitation erosion; SEM; XRD (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X25500052

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