Plasma Carburizing of Sintered Pure Iron at Low Temperature
AUTOR(ES)
Lamim, Thiago de Souza, Bernardelli, Euclides Alexandre, Binder, Cristiano, Klein, Aloisio Nelmo, Maliska, Ana Maria
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
2015-04
RESUMO
In this work, plasma carburizing of sintered pure iron at low temperature was investigated. Samples were carburized under a dc abnormal glow discharge in two mixed atmospheres (5%CH4 + 95%H2 and 20%CH4 + 80%H2) at 500 °C and 700 °C for 3 and 6 hours. The influence of these parameters was investigated by Scan Electron Microscopy (SEM), X-ray Diffraction (DRX), Raman spectroscopy and microhardness measurements. There is a correlation between temperature and layer morphology, and a layer of polycrystalline cementite was obtained at 500 °C and 700 °C on a ferrite substrate. Furthermore, the carburized layer thickness increased with an increase in the treatment time and the methane percentage. The topography is very dependent on the treatment temperature.
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