Thermochemical solid cementation treatment using rice husk ash and charcoal on SAE 1020 Steel
DOI:
https://doi.org/10.18066/revistaunivap.v32i73.4688Palavras-chave:
Rice husk ash, Cementation, environmental impacts reducing, 1020 steel improvement, thermochemical surface treatmentResumo
Rice husk ash (RHA) originates from rice husks burning for energy generation, where it is often disposed of inappropriately, causing negative environmental impacts. This is abundant and low-cost, so it could use to new uses. With it in mind, this research aimed the comparative study between effects of carbon source from charcoal and RHA. After carburization at 900°C for 8h and 15h and 950°C for 15h. Next, the samples were undergoing heat treatment by quenching in water and tempering at 180˚C. The samples were analysed by optical microscope, microhardness test, X-ray diffractogram and wear test, showing that the heat treatment procedures were performed correctly, obtaining higher surface hardness values. Likewise, optical microscope and hardness analysis, show a surface layer enriched with carbon resulting from cementation. The images show the poor formation of martensite in the microstructure of the samples with heat treatment and tempering; there was a significant increase in surface wear resistance after the procedures performed with RHA powder and charcoal. In general, the results of microhardness and wear resistance in the samples cemented with charcoal were higher.
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