Efeito dos parâmetros de usinagem na usinabilidade dos aços inoxidáveis 410D e 420A ferrítico e martensítico no processo de eletroerosão por penetração
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Data
2023-02-27
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Universidade Federal de Goiás
Resumo
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.
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CUNHA, J. B. Efeito dos parâmetros de usinagem na usinabilidade dos aços inoxidáveis 410D e 420A ferrítico e martensítico no processo de eletroerosão por penetração. 2023. 78 f. Dissertação (Mestrado em Engenharia Mecânica) - Universidade Federal de Goiás, Goiânia, 2023.