RESUMO
Investigation of optimum carburizing temperature and holding time on bi- nano additives treatment of AISI 5130 steel was presented in this study. AISI 5130 steel of 100â¯kg mass of 0.35% carbon content was buried in pulverized additives consisting of palm kernel and coconut shell using eggshell as an energizer. Four sets of 150×150×150â¯mm3 steel boxes packed with additives mixed at varying weight ratio of 50: 30:20 and sixty-four pieces of 20×20×5â¯mm3 AISI 5130 steel were case hardened using muffle furnace (2500⯰C max capacity) at respective temperatures and time of 950, 1000, 1050, 1100⯰C and 60, 90, 120, 180â¯min. The core, interface and surface hardness of the treated samples with their respective weight loss, wear volume and rate were investigated. This dataset could be used in nano-composite match mixed ratio and optimization of carburizing medium and time for any industrial used case hardened steel.
RESUMO
The effects of temperature and time variances on nano-additives treatment of mild steel during machining was presented in this study. Mild steel of 150â¯kg mass containing 0.56% carbon was charged into the furnace at melting and pouring temperature of 1539 and 1545⯰C respectively. Also charged into the furnace with the mild steel were 0.05% max phosphorous and a bit of sulphur. Thereafter, the sample was cooled and annealed at a temperature of 900⯰C for 9â¯h and then cooled to 300⯰C of hardening, normalizing and tempering respectively. The treated samples were then soaked with pulverized in palm kernel shell and barium carbonate (20%) energizer at respective temperatures (800, 850, 900 and 950⯰C) and time variances (60, 90 and 120â¯min) in a muffle furnace. The developed tool was tested on a lathe machine to evaluate its performance. The surface and core hardness, wear resistance and toughness were carried out using the hardness tester, Rotopol-V and impact tester respectively. This is essential for predicting the useful life of the tool in service.