Mn-Si-C용탕 내 C 및 Si의열역학적 거동에 관한 연구

Abstract

Thermodynamics of carbon in manganese alloy melts is important in manufacturing low carbon ferro-manganese and silico-manganese alloys. In order to predict the carbon solubility in liquid Mn-Si-C alloys as a function of melt composition and temperature, thermodynamic interactions among carbon, silicon in carbon saturated liquid manganese should be known. In the present study, the effects of silicon on the carbon solubility in Mn-Si melts were measured in the temperature range from 1400 to 1500℃. The carbon solubility decreases significantly as iron and silicon contents increase in liquid manganese alloy. The interaction parameters among carbon, silicon in liquid manganese were determined from the carbon solubility data and the Lupis' relation for the interaction coefficient at constant carbon activity as follows