Effect of Cr₃C₂ on wear behavior of Ni45 laser cladding coating

Abstract To improve the performance of engineering components subjected to severe wear, temperature fluctuations, and corrosive conditions in industries such as chemical, aerospace, and power plants, Ni45-based coatings with varying Cr 3 C 2 contents (0%, 10%, 20%, and 30%) were applied to a 45-steel surface. The microstructure of these coatings was examined by scanning electron microscopy (SEM), and their wear resistance was compared. As the Cr 3 C 2 content in the cladding layer increased, there was a notable improvement in its wear resistance. Specifically, when the Cr 3 C 2 content reached 30% by weight, the wear resistance of the cladding layer exceeded that of the GCr15 steel. Furthermore, the adhesive wear between the cladding layer and the GCr15 steel diminished, while the oxidation wear of the GCr15 steel intensified. This study aims to elucidate the primary wear mechanisms of the Cr 3 C 2 /Ni45 cladding layer and offer valuable insight into improving the durability of engineering components in harsh environments.