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建立了TC4合金电子束冷床熔炼过程熔体中各元素饱和蒸气压的数学计算模型,利用该模型计算了TC4合金熔体中各元素的饱和蒸气压及其挥发速率,与实验结果基本一致。计算结果表明,在相同温度下,Al元素的饱和蒸气压最大,是其它两种元素的几百倍,挥发损失也最为严重。随着熔体温度的增加,挥发趋势也增大。V元素的挥发很少,可以忽略。此外,电子束冷床熔炼去除杂质效果显著,熔炼出的铸锭成分符合国家标准。
The mathematical model for calculating the saturated vapor pressure of each element in the melt of TC4 alloy electron beam cooling bed was established. The saturated vapor pressure and its volatilization rate of each element in the melt of TC4 alloy were calculated by this model, which is basically consistent with the experimental results. The calculated results show that the saturated vapor pressure of Al is the largest at the same temperature, which is several hundred times higher than that of the other two elements, and the volatilization loss is the most serious. As the melt temperature increases, the volatilization tendency also increases. V element of the volatile little, can be ignored. In addition, the electron beam cooling bed smelting effect of removing impurities is significant, the melting ingot composition in line with national standards.