Abstract
This work examines the effect of process variables on the mechanical property of carburized AISI 1018 steel quenched in water and oil for improved performance. A carburizer consisting of charcoal was used for research with sea shell as energizer. Samples were carburized using weight percent of seashell (10, 20, 30 and 40%) with particle sizes of 212 μm, 425 μm and 600 μm respectively. The process was carried out at carburizing temperature of 950°C, soaked for 4, 6, and 8 hours and quenched in oil and water. The samples were further tempered at 200°C for 1hour to relieve the stress built up during quenching. Hardness test was carried on the steel samples. The results of the study showed that hardness values of the carburized and tempered steel increased with influence Original Research Article Akanji et al.; BJAST, 7(1): 37-44, 2015; Article no.BJAST.2015.124 38 of soaking time, volume fraction and particle sizes of energizer. The optimal carburizing effect was achieved at 90% charcoal and 10% seashell (energizer) of 212 μm particle size at 8 hrs soaking time when quenched in water.
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