摘要
通过采集金属铸造过程中铸件/铸型界面上温度的变化曲线,利用有限元分析软件ANSYS模拟了金属铸造凝固过程的温度场,采用非线性估算法,求解了以铝合金为铸件材料的铸件/铸型间的界面传热系数,发现了该界面传热系数随时间的变化规律.计算结果表明:在金属铸造过程中,铸件-铸型界面传热系数随着凝固时间的增加迅速下降,随后下降变得缓慢,凝固结束后趋于稳定.铸型厚度增大对界面传热系数有很大影响,随着铸型厚度的增加,界面传热系数减小.
Based on the temperature profiles obtained at different locations at the casting-mold interface, the temperature field in casting solidification was simulated by the finite element software, ANSYS. The metal-mould interfacial heat transfer coefficient （IHTC） was successfully determined using the nonlinear estimation method. It is found that IHTC changes with time in a metal casting. The calculation results indicated that the IHTC, firstly, decreased quickly as the solidification process of the liquid metal proceeds and then fell slowly until the liquid metal solidified completely, when the IHTC intended to be stable. Mould thickness played an important role in affecting the interracial heat transfer coefficient. As the thickness of the mould side, the value of IHTC decreased.
出处
《天津理工大学学报》
2009年第1期63-66,共4页
Journal of Tianjin University of Technology
基金
天津市高等学校科技发展基金(20051010
2006BA09)
关键词
金属铸造过程
有限元
温度场
非线性估算法
界面传热系数
metal casting
finite element
temperature field
nonlinear estimation method
interfacial heat transfer coefficient
作者简介
竹励萍（1982-），女，硕士研究生．
通讯作者：陈玲（1964-），女，教授，硕士生导师
