Pelapisan Calsium Carbida Permukaan Baja Karbon Rendah Dengan Pack Carburizing Energizer Serbuk Cangkang Kerang Mutiara

Abstract

The research was conducted at the Laboratory of Material Mechanics, Department of Mechanical Engineering, Mataram University. The purpose of this researchàà determinedà the effect of the Pack Carburizingà parameters (temperature, soakinà time and carburizer media composition) on the thicknessà of calsium carbida layerà (CaC), which is formed on the surface of low carbon steel. The thickness of the calcium carbonate layer affects the surface hardness numberà of low carbon steel. This research used low carbon steelà grade SS400 as the specimen. Carburizer media is a mixture of corncob charcoal powder and Pinctada maxima shellsà powder (PMSP).à Packs Carburizing was carried out at various temperatures: 875 ⁰C, 900 ⁰C, soakingà time: 1,2,3 hours and the percentage of PMSP on the carburizer media: 10%, 20%, 30%. The results of the research show that the temperature carburizing , soaking time and the addition of PMSPà affect the thickness of the calcium carbide layer on the surface of SS400 steel which is subjected to pack carburizing process. This is indicated by an increase in the surfaceà hardness number of 421%, the wear resistance 62,2 %. àthe thickness of the calcium carbide layer 1050 õm, the formation of pearlite structure, at the carburizing temperature of 900 ⁰C,à soaking time 3 hours and 30% addition of PMSP.