为了简便、准确地确定在凝固过程中铸件与铸型间的界面传热系数,提出了一种新的简化反求法.先选择一个形体简单的铸件作为标准试样,利用不同的传热系数进行若干次温度-时间曲线的有限元模拟,并与实际铸件中对应点的温度-时间曲线进行比较;当两曲线比较接近时,该传热系数可作为铸件与铸型之间的等效界面传热系数;并将其作为实际叶轮铸件有限元模拟的参数,所得到的模拟结果与试验结果相符,证明该方法准确可靠.
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