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Plasma Carburizing of Sintered Pure Iron at Low Temperature

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%CH sub(4)+ 95%H sub(2) and 20%CH sub(4)+ 80%H sub(2)) at 500 [degrees]C and 700 [degrees]C for 3 and 6 hours. The influen...

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Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2015-04, Vol.18 (2), p.320-327
Main Authors: Lamim, Thiago de Souza, Bernardelli, Euclides Alexandre, Binder, Cristiano, Klein, Aloisio Nelmo, Maliska, Ana Maria
Format: Article
Language:English
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Summary: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%CH sub(4)+ 95%H sub(2) and 20%CH sub(4)+ 80%H sub(2)) at 500 [degrees]C and 700 [degrees]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 [degrees]C and 700 [degrees]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.
ISSN:1516-1439
1980-5373
1516-1439
1980-5373
DOI:10.1590/1516-1439.306514