铸造过程中高温钛合金Ti-1100变形的有限元分析

Finite Element Analysis of High Temperature Ti-1100 Titanium Alloy Deformation During Casting Process

采用ANSYS有限元软件对Ti-1100钛合金框架结构铸件在铸造过程的变形、应力和温度场进行了模拟研究。在模拟的初始阶段,将石墨型壳设置为RIGID模型,之后设置为VACANT模型。结果表明,框架结构铸件的内部和上部温度较低,而较高的温度分布在下部浇道位置;铸件发生弯曲变形的位置为两侧尖部,方向为y轴负方向;应力集中出现在铸件的内部结构转角处。将模拟结果和实验结果对比,二者能够吻合良好,说明了模拟的正确性。

The deformation, the stress and temperature field of casting process for Ti-1100 titanium alloy framework were simulated and researched with finite element ANSYS software. In the first stage, the model of the graphite mould was set as RIGID, then set to VACANT. The results show that the casting internal and the upper part has the lower temperature, and the higher temperature distribution in the bottom part and the pouring gates. At two tips of the framework castings have bending deflection along y axis. Stress concentration occurs in the comer of the internal structure of the castings. The results of the simulation and experimental exhibit a good agreement, which verify the accuracy of the simulation.