中文摘要：

分别采用分子相互作用体积模型（MIVM）和统一相互作用参数公式（UIPF）,对锰系铁合金的四元熔体Mn-Fe-C-Si及其子三元熔体Mn-Fe-C和Mn-C-Si中组元Mn的活度进行了预测,并与实验值进行了比较分析,其中UIPF中的参数来自不同研究者.研究结果表明：在Mn-Fe-C熔体中,MIVM预测值的相对误差为8%,而UIPF应用则随不同研究者的参数计算而不同,相对误差介于6%至14%之间;在Mn-C-Si熔体中,MIVM和UIPF预测值的相对误差分别为10%和28%;在Mn-Fe-C-Si熔体中,当xFe=0.05时,MIVM和UIPF预测值相对误差分别为5%和12%;当xFe=0.1时,MIVM和UIPF预测值相对误差分别为8%和11%.这表明在锰系铁合金熔体中MIVM的预测效果总体优于UIPF,可以取代Wagner型公式.

英文摘要：

The activities of Mn in the Mn- Fe- C- Si quaternary system,Mn- Fe- C and Mn- C- Si ternary system of manganese ferroalloys melt are predicted by the Molecular Interaction Volume Model（ MIVM） and Unified Interaction Parameter Formula（ UIPF） whose interaction parameters are measured by different researchers.Compared with the experimental data,the predicted results are as follows： in Mn- Fe- C melt,the relative error calculated by MIVM is 8%,while that of UIPF is in a range of 6% to 14% because of different parameters; in the Mn- C- Si melt,the relative errors based on MIVM predicted values and the ones based on UIPF are 10%and 28% respectively; in the Mn- Fe- C- Si melt,When xFe= 0. 05,the relative errors of the MIVM ones and the UIPF ones are 5% and 12% respectively; when xFe= 0. 1,the relative errors of the MIVM prediction and the UIPF prediction are 8% and 11% respectively. The predictive effect of MIVM is shown to be superior to that of UIPF,which indicates that MIVM has the potential to replace Wagner formula.