金属液压力对缩松预测的影响

The Effect of Liquid Metal Pressure on the Prediction of Shrinkage Porosity

铸件凝固过程数值模拟中通常用的缩松判据为，将金属液的静压力Ｐ０引入到缩松的判据中，新的缩松判据为。通过实验证明，对于铸钢件来说，当时，将产生缩松，而对于低压铸造的铝合金来说，当时，将产生缩松。同时说明以作为铸造中铸件凝固过程数值模拟的缩松判据比更加准确。

The, is usually used as criterion of the shrinkage porosity in simulation of castings solidification process. When static pressure of the liquid metal has been added to the criterion of shrinkage porosity, the new criteri-on should be. The condition that the porosity will occur is in cast steel while in cast aluminum alloy . The new criterion is more accurate than the old one.