Study of The Effect of Manganese Content and AustenitizationTemperature on The Microstructure and Mechanical Properties of Manganese Steel

Abstract

High manganese steel or austenitic manganese steel commonly are used in mining industries such as the component in an excavator, hammer mill, crusher, and jaw crusher plates. Those components are the alloy cast steel with containing manganese (Mn) about 11-18%. The mechanical properties of austenitic manganese steel are depending on the amount of manganese and carbon. The austenitic steel has three dominant properties, i.e. high hardness; good wear resistance, and high impact resistance. The objectives of this research are investigating the effect of the composition of manganese and the austenitization temperature on the microstructure and mechanical properties of austenitic manganese steel. Each variation of manganese composition was 5.87%. 9.42% and 15.28%. It was heated at 950, 1000 and 1050oC for 60 minutes and then quenched with water. The result showed that the highest hardness was 46 HRC where the composition of manganese and the austenitization temperature was 5.87%. and 1050oC. The lowest hardness number was 16.3 HRC where the content of manganese and the temperature was 9.42%. and 1050oC. The results agreed with the microstructure of the increase in carbides and the composition of manganese increased too. For the wear resistance properties, the optimum one was 6.78 x 10-6 mm3/m at the composition of manganese and temperature of 5.87% and 1050oC.