Influence of Cr3C2/NiCr Coating on Stainless Steel and Optimization of Mechanical Properties by Thermal Sprayed High Velocity Oxy-Fuel Coatings

Abstract

The thermal spray coating is one of the surface strengthening techniques are being used in different applications like, hydro turbine blades, automobile engine, aerospace and medical tools etc. Various coating techniques have been utilised to enhance the surface properties of the base material. The aim of this present work is to optimise the High-Velocity Oxy-Fuel (HVOF) spray process parameters such as, LPG flow rate, Oxygen flow rate, powder feed rate and standoff spray distance of Cr₃C₂-25%NiCr coated stainless steel material through Response Surface Methodology (RSM) method. The metallurgical structural studies have been examined by the Optical Microscope, Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) analyses whereas, surface hardness was determined by the Vickers micro hardness tester. The maximum obtained surface coating hardness is 1258/HV for the corresponding optimized HVOF process parameters the optimised process parameters such as LPG flow rate, Oxygen flow rate, Powder feed rate and Standoff distance are 65.45 lpm, 280 lpm, 40.55 gpm and 220 mm respectively. The maximum enhancement of Vickers micro hardness of Cr3C2-25%NiCr coated stainless steel is 25.85% over uncoated base metal.

Cite as

Maheshwaran S., Muthukumar J., Gobalakrishnan B., & Thirumani K. S. (2022). Influence of Cr3C2/NiCr Coating on Stainless Steel and Optimization of Mechanical Properties by Thermal Sprayed High Velocity Oxy-Fuel Coatings. Journal of Advanced Research in Industrial Engineering, 4(3), 1–14. https://doi.org/10.5281/zenodo.7445414