FORMATION OF WEAR-RESISTANT LAYERS BY ARC WELDING USING FLUX-CORED WIRES

Metallurgy and Materials
Authors:
Abstract:

The problem of increasing the wear resistance of parts operating under conditions of abrasive wear is very important today. There are many technologies and alloying systems used to create wear-resistant layers. A promising technology in terms of productivity and obtaining thick surfacing layers is arc welding using flux-cored wires. The article discusses the formation of layers using flux-cored wires, followed by the study of microstructure, microhardness, and X-ray diffraction analysis. The results show that the use of arc welding in shielding gases and flux-cored wires allows one to obtain high-quality coatings without surface defects such as cracks and pores. Also, microstructure data show that when arc welding performs with ПП-НП80Х20Р3Т wire, a dendritic structure with chromium carbides is formed along the grain boundaries, and layers made with ПП-НП80Х20Р3Т wire are characterized by the highest hardness value compared to other wires considered in this work.