Comparative analysis of cast and flux-cored wire based coatings during electric arc metallisation

Abstract

The paper presents the results of investigation of properties of coatings obtained by electric arc metallisation on 65G steel substrate using different types of wire - cast and powder. A comparative analysis of the influence of chemical composition and technological parameters of sputtering (wire feed rate, gas pressure, sputtering distance, substrate preheating) on thickness, porosity, micro-hardness, roughness and adhesion of coatings has been carried out. It is found that cored wire provides lower porosity, improved structure uniformity and increased hardness compared to cast wire. Optimal parameters of the spraying mode allowed to achieve the maximum coating thickness up to 712 microns and minimum porosity of 4.3%. The results of the research confirm the prospectivity of powder wires application for formation of wear-resistant and corrosion-resistant coatings in machine-building and other industries.