Effect of Nicr Content on Microstructure Properties of Fe3TiO4 Coatings Prepared by HVOF Process on Low Alloy Steel

In this study, high-velocity oxygen-fuel (HVOF) process was applied to produce Fe3TiO4 coating on the low carbon steel by adding NiCr. For this purpose, NiCr powder with the same ratio of 25% was mixed with Fe3TiO4. The structural and mechanical properties of the coatings were evaluated using scanning electron microscopy, X-ray diffractometry, micro hardness and roughness test. The results showed that the microstructure of the coatings is homogeneous and uniform, consisting of a nickel and iron solid metal solution with nickel chromium in titanium oxide. The XRD results indicated that the coatings included Fe 2O3, FeNi3, TiO2 and Fe2TiO4 phases. It was also found that the hardness was increased, roughness and porosity was decreased by addition of NiCr