【摘要】 建立了氮元素溶解到ＴｉＡｌＳｎ合金中的热力学模型，并以此计算了氮在ＴｉＡｌＳｎ合金熔体中的溶解度；分析了ＩＳＭ（感应凝壳熔炼）熔炼过程中影响氮元素在ＴｉＡｌＳｎ合金中溶解度的几个因素。结果表明，熔化室内氮气分压是决定ＴｉＡｌＳｎ合金氮元素含量的主要因素，需要合理控制。熔体温度对ＴｉＡｌＳｎ合金中氮的溶解度也有较大影响，并提出了利用多次抽真空反充氩气以降低熔化室内氮气分压的新方法更多还原

【Abstract】 Abstract A thermodynamic model on the solubilizing of a nitrogen into TiAlSn melt has been established,based on this,nitrogen solubility in the alloy was calculated and some factors influenced nitrogen solubility in TiAlSn melt during ISM process were also analyzed.The results revealed that the nitrogen partial pressure in melting chamber and the melt temperature produce the decisive effect on the nitrogen solubility in TiAlSn melt,a method for decreasing nitrogen partial pressure in melting chamber using multiple vacuumizing and Arfilling is proposed.更多还原