Análise de resistência ao desgaste entre três revestimentos duros depositadas por FCAW

Abstract

Wear is one of the main issues encountered in industrial operations, leading to high costs due to equipment failures, unexpected downtimes for maintenance, and constant replacement of parts. Through the application of technologies aimed at reducing friction and improving wear resistance, these losses can be minimized in industries such as mining, cement, sugarcane-alcohol, and steel, for example. One solution to reduce maintenance expenses on assets due to wear is the application of high abrasion-resistant bimetallic plates. The objective was to investigate the microstructure, hardness, and wear resistance of two hyper-eutectic hardfacing alloys of white cast iron with high chrome from the Fe-C-Cr and Fe-C-Cr-B-Nb systems used in the manufacture of bimetallic plates deposited by the FCAW-S technique. Due to the dilution of the filler metal in the base metal, there is a variation in the wear resistance of the plate depending on the number of deposited welding layers. Therefore, this study also aimed to examine wear resistance due to the dilution effect by evaluating the Fe-C-Cr-B-Nb alloy with one and two deposited layers. The results indicated better wear performance for the Fe-C-Cr-B-Nb alloy compared to the Fe-C-Cr alloys and better performance for the two-layer coating compared to the single-layer coating.