Abstract
Coal-fired plants and power station boiler valves are subjected to degradation by erosion and wear. The existence of wear and erosive environments recommends the need of thermal spray coatings on component parts, to increase the life. In the present study, detonation gun spray process (DG) is considered for coating 86WC-10Co-4Cr and 75Cr3C2-25NiCr on martensitic stainless steel (0.07C-0.79Si-0.67Mn-13.95Cr-3.79Ni-0.42Mo-80.11Fe) substrate. Porosity and hardness tests are employed for the characterization of coatings. Ductile metals and alloys have exhibited highest erosion rate when the angle of impact is between 15° to 30°, and brittle materials like ceramics, carbides, and cermets have shown maximum erosion rate near 90°. Hence, erosion test was carried out at an impact angle of 90° by means of silica as an erodent material at a velocity of 60 m/s, with the help of an air jet sand erosion tester. Based on cumulative weight loss, it is observed that 75Cr3C2-25NiCr coating on martensitic stainless steel has shown better wear resistant than the 86WC-10Co-4Cr coating.
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Jhansi, J., Santhi, S., Lakshmi Narayana, P.V.S., Deogade, B.K. (2022). Detonation Gun Spray Coatings on Martensitic Stainless Steels. In: Natarajan, S.K., Prakash, R., Sankaranarayanasamy, K. (eds) Recent Advances in Manufacturing, Automation, Design and Energy Technologies. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-4222-7_10
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