Comparison of Abrasive Wear Resistance of Arc-Sprayed and HVOF-Sprayed Coatings as well as Overlay Welds Made Using Self-Shielded Flux-Cored Wire

Abstract

The article presents results of tests concerning the metal-mineral abrasive wear resistance of arc-sprayed coatings with lower and higher air pressure (larger and smaller drops of metal) and HVOF-sprayed coatings deposited using the self-shielded flux cored wire providing the obtainment of the weld deposit of highchromium cast iron Fe15 (in accordance with EN 14700). The significance of influence of the spraying technologies on abrasion resistance was determined using a completely randomized design. The scope of tests also included the analysis of the chemical and phase compositions as well as the microscopic metallographic tests of deposited (sprayed) coatings. For comparison, analogous tests were carried out for the overlay welds applied by self-shielded flux cored arc surfacing using the same flux cored wire.