(1. 西安建筑科技大学 冶金工程学院，西安 710055；2. 西北有色金属研究院，西安 710016)
摘 要: 基于活度系数计算模型和控制传质系数计算模型，从热力学角度分析Ti-13Nb-13Zr合金熔体中主组元的饱和蒸气压以及熔炼过程中主组元的挥发趋势。结果表明：合金中主组元的挥发损失速率不同，使得熔炼前后合金的成分出现变化，合理地降低熔体的温度和提高真空室中的压力可以减小熔炼过程中合金成分的变化，也为Ti-13Nb-13Zr合金VAR熔炼合金成分的控制提供理论指导。
关键字: Ti-13Nb-13Zr合金；VAR熔炼；主组元控制
Ti-13Nb-13Zr alloy in VAR process
（1. Xi’an University of Architecture and Technology, Xi’an 710055, China;
2. Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China）
Abstract:Based on the activity coefficient calculation module and mass transportation control coefficient calculation module, the saturated pressures and volatilization direction of Ti-13Nb-13Zr alloy in VAR process from thermodynamics field were analyzed. The results indicate that the ultimate alloy chemical composition deviates from its original composition after the melting process because of different mass loss rates. Properly decreasing the melting temperature or increasing the chamber pressure can decrease the composition deviation, which will give some guidance to the alloy composition controlling in VAR process.
Key words: Ti-13Nb-13Zr alloy; VAR process; main group element control
