Efeito dos parâmetros de usinagem na usinabilidade dos aços inoxidáveis 410D e 420A ferrítico e martensítico no processo de eletroerosão por penetração

• Ano de defesa: 2023
• Autor(a) principal: Cunha, João Bosco da
• Orientador(a): Cunha, Daniel Fernandes da
• Banca de defesa: Cunha, Daniel Fernandes da, Oliveira, Deborah de, Viana, Rhander, Contin, André
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Engenharia Mecânica
• Departamento: Escola de Engenharia Elétrica, Mecânica e de Computação - EMC (RMG)
• País: Brasil
• Palavras-chave em Português: Eletroerosão; Aço inoxidável; Taxa de remoção de material; Taxa desgaste eletrodo
• Palavras-chave em Inglês: Electrodischarge machining; Stainless steel; Material removal rate; Electrode wear
• Área do conhecimento CNPq: ENGENHARIAS::ENGENHARIA ELETRICA::MATERIAIS ELETRICOS::MATERIAIS CONDUTORES
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/12690

Electrodischarge Machining is an unconventional machining process that has served as an alternative for machining difficult-to-machine materials and complex geometries by removing material through electrical discharges. In the electrical discharge machining (EDM) process, it is necessary to know the parameters that affect material removal, electrode wear and the surface finish of the workpiece. Knowing these parameters provides greater productivity and reduction of costs in machining process. In this context, this work seeks to establish, through a design of experiments (DOE), an analysis about the behavior of the process with different values of electrical current, electrical discharge time and the working GAP during machining AISI stainless steels 410D and 420A, supplied in annealed state. After tempering process, it changes its ferritic to martensitic microstructure. It was statistically verified that electrical current affected material removal rate (MRR), electrode wear rate (EW) and surface roughness. These data confirms literature review about using higher currents for rough machining, sacrificing the electrode tool for increasing material removal process, and smaller electrical currents for finishing machining parameters, guaranteeing the final geometry and better surface quality of the machined cavity. Heat treatment is shown by this research to have no significant influence on material removal rate, electrode wear and surface roughness.