The study of low carbon steel pack carburizing using cow bone and coconut shell

Abstract

Despite of the ability of cow bone and coconut shell to be able to be processed into a charcoal, so far these have been only used as fuel or left aside becoming waste, in order to improve the economy value of cow bone and coconut shell waste, it requires processing into a charcoal. The cow bone and coconut shell can be obtained from copra farmers and cow slaughtering house farmers. In this research cow bone and coconut shell charcoal were used as carbon sources to improve low carbon steel hardness. The objective of this research was to find out the influences of temperature and charcoal composition to low carbon steel hardness. A process to use in this research was pack carburizing by using cow bone and coconut shell charcoal and applied temperatures of 900°C, 950°C, and 1000°C during 3 hours of retention. After pack carburizing, the %C content was improved between 0.710% and 1.20%. This improvement was followed by hardness value up to 64.04 kgf/mm2 at 900° C, 64.20 kgf/mm2 at 950°C, and 64.30 kgf/mm2 at 1000°C.