大规格钛锭连铸过程中熔炼速度对凝固界面的影响

Effects of Melting Speed on Solidification Interface in Continuous Casting Process of Large Scale Titanium Ingot

通过建立电子束冷床熔炼大规格钛锭稳态连铸模型,考虑了温度场和流场的耦合行为,使用有限元方法定量地获得熔炼速度对大规格钛锭凝固过程中的熔池深度和固相率的影响规律。结果表明:在一定工艺条件下,流场耦合温度场后固相率将增加,熔池深度将降低;当熔炼速度降低时,固相率增加,熔池深度降低,同时钛锭液相区流速降低。

The model of continuous casting in steady state of electron beam cold hearth melting large scale titanium ingot was established. Considering coupling behavior of temperature and flow field, the effects of melting speed on the depth of molten pool and solid fraction during the solidification of large scale titanium ingot were obtained by using the finite element method. The results show that under certain technological conditions,when the fluid field is coupled with temperature field, the solid fraction increases and the depth of molten pool decreases; when the melting speed decreases, the solid fraction increases and the depth of molten pool and the flow rate of liquid phase decrease.