灰铸铁箱盖的消失模铸造数值模拟研究

Numerical Simulation on Lost Foam Casting of Gray Cast Iron Box Cover

采用数值模拟方法对灰铸铁箱盖的消失模铸造过程进行了模拟。研究了消失模铸造的充填与凝固特性,并与实际生产进行了对比。结果表明,该件采用底注式浇注系统,浇注温度为1400℃,泡沫模样密度为13kg/m3,负压度为0.04MPa,涂料厚度为0.5mm,涂料透气性为9.5×10-9m2/(Pa.s)。

The lost foam casting process of gray cast iron box cover was simulated by using the numerical simulation method. The properties of the mould filling and solidification for lost foam casting were studied. And the comparison of the simulated results with the practical casting was carried out. The results show that the bottom gating system is used for the casting, pouring temperature is 1400℃, foam density is 13 kg/m3, vacuum is 0.04 MPa, coating thickness is 0.5 mm and coating permeability is 9.5x10-gm2/（Pa. s）.