L形镁合金铸件凝固过程温度场的有限元模拟
Finite Element Simulation of Temperature Field in L-shape Castings of Magnesium Alloy in Solidification Process
刘广君
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作者单位：（北方民族大学 材料科学与工程学院， 宁夏 银川 750021）
中文关键字：凝固； 温度场； 镁合金； 数值模拟
英文关键字：solidification; temperature field; magnesium alloy; numerical simulation
中文摘要：以“L”形镁合金铸件砂型铸造为例，对其凝固过程进行了合理的假设和简化，利用ANSYS平台，对其凝固过程温度场宏观变化进行了有限元计算，获得了砂型与铸件在凝固过程中的温度分布规律。在凝固过程中，铸件温度一直呈下降趋势，砂型温度的变化趋势是先升高后降低。计算结果表明，三维温度场的数值模拟能够反映铸件冷却过程温度场的动态变化，为提高铸件质量、确定凝固时间和优化工艺参数提供了参考。
英文摘要： Based on the solidification processes of L-shape magnesium alloy castings in sand casting, its reasonably simplification and proper assumptions were made. The three-dimensional temperature field of L-shaped sample of magnesium alloy with sand mold in solidification process was simulated using finite element software-ANSYS, the changing regularity of temperature distribution in the magnesium alloy solidification process with sand casting was obtained. From beginning to end, the temperature of the castings was all along descending, however, the temperature of sand mould first lifting then droping. The results indicate that the numerical simulation of temperature field can reflect the dynamic change of temperature field in casting cooling process, which provides a foundation for improving the manufacture quality, determining solidification time and optimizing process parameters.