Aplicação de revestimento duro utilizando o processo FCAW duplo arame para diferentes tipos de consumíveis

• Ano de defesa: 2015
• Autor(a) principal: Souza, Daniel Dominices Baia Gomes de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Engenharia Mecânica; Engenharias; UFU
• Palavras-chave em Português: FCAW duplo arame; Revestimento duro; Arame tubular; Resistência ao desgaste; Soldagem; Desgaste mecânico; Resistência de materiais; FCAW double wire; Hardfacing; Wear resistance; Welding process; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/14994; https://doi.org/10.14393/ufu.di.2015.341

The application of hardfacing brings the reduction of the wear and therefore increases service life of components and reducing the maintenance shutdowns. This work aims to study the wear resistance of hardface applied by welding, by using the process FCAW (Flux- Cored Arc Welding) Self-Shield Double Wire. Three types of consumables were used (FeCrC, FeCrC+Ti and FeCrC + Nb) with diameter 1.6 mm in twelve coating conditions. The coating was applied by welding on a steel SAE 1020 with and without E308lSi buttering, with metal transfer mode in short circuit. It was compared the deposits made with each condition. It was constructed specimens for the evaluation of wear in the laboratory with Rubber Wheel according to ASTM G65-00. The wear evaluation was made via mass loss. It was also carried analysis hardness and microhardness of the coating microstructure. The best wear resistance results were obtained with the use of two wires electrode with the same composition (FeCrC + Ti). The presence of Ti in the coating has fewer cracks and improves wear resistance in this study. The conditions with buttering have not shown good results with respect to wear resistance of coatings.