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This work pack carburized mild steel test specimens with locally sourced bone charcoal, coal and wood charcoal, hardened and tested the specimens for hardness, impact and tensile strengths.
Moderating effect of time was investigated at one hour, two hours, three hours, four hours and five hours carburising times.
Direct testing and measurements of hardened specimens on appropriate testing machines showed that: coal, wood charcoal and bone charcoal increased both hardness and tensile strength of mild steel but decreased the impact strength; wood charcoal had the greatest hardening effect on mild steel; and carburising material and carburising time interaction showed significant effect only on hardness.
The work found suitable local alternative carburising materials for metal workers and metalworking industries.
Ohize MNATT, MTRCN is an Associate Professor (Industrial &Technology Education) at Federal Univ.
of Technology, Minna, Nigeria.
He is the Deputy Dean (School of Technology Education) and the Head of Department (Industrial and Technology Education) at the University
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