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。 Based on the activity coefficient calculation model and the control mass transfer coefficient calculation model, the saturated vapor pressure of the main component in the Ti-13Nb-13Zr alloy melt and the volatilization tendency of the main component in the melting process were analyzed from the thermodynamic point of view. The results show that the main components of the alloy have different volatilization loss rates, which make the composition of the alloy change before and after smelting. The reasonable decrease of the melt temperature and the increase of the pressure in the vacuum chamber can reduce the variation of the alloy composition in the melting process. Ti-13Nb-13Zr alloy VAR melting alloy composition control to provide theoretical guidance.