根据离心浇注的铸造工艺特点,推导了离心压力下金属的凝固收缩和补缩数学模型,模拟计算了铸件的温度场和收缩缺陷。提出了离心压力场中缩松预测的判据,将其应用到铸件数值模拟预测中,数值模拟结果与实验结果基本吻合,说明通过数值模拟可以优化工艺措施以达到消除缩孔缩松缺陷的目的。 According to the casting process characteristics of centrifugal casting, the mathematical model of solidification shrinkage and shrinkage of metal under centrifugal pressure was deduced. The temperature field and shrinkage defects of the castings were simulated. The criteria of shrinkage prediction in centrifugal pressure field are put forward and applied to the numerical simulation prediction of castings. The numerical simulation results are in good agreement with the experimental ones, which shows that the numerical simulation can optimize the process measures to eliminate the shrinkage defect .