Jingjie GUO
,
Guizhong LIU
,
Yanqing SU
,
Jun JIA
材料科学技术（英文）
A new model was established to calculate the real vapor pressure of Al in the molten Ni-xAl (at. pct) (x=25～50) alloy. The effects of the holding time, chamber pressure, mole fraction of Al and melting temperature on the real vapor pressure of Al in the vacuum chamber were analyzed. Because of the impeding effect of the real vapor pressure on the evaporation loss rate, within a short time (less than 10 s), the real vapor pressure tends to a constant value. When the chamber pressure is less than the saturated vapor pressure of Al, the real vapor pressure of Al is equal to the chamber pressure. While when the chamber pressure is higher than the saturated vapor pressure, the real vapor pressure of Al approaches to the saturated vapor pressure of Al of the same condition.
关键词:
Real vapor pressure
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Jingjie GUO
,
Yuan LIU
,
Hongsheng DING
,
Yanqing SU
,
Jun JIA
材料科学技术（英文）
Using direct finite difference method, a numerical model for simulating the temperature field in the charge during induction skull melting (ISM) has been developed. On the basis of the model, the temperature field in Ti- 47Ni-9Nb ingot has been calculated under various melting conditions. Finally, the processing parameters (melting power, melting-down time and the final melt temperature) have been optimized.
关键词:
