梯度石墨铸铁玻璃模具液态模锻模拟与仿真

Squeeze casting simulation of gradient graphite cast iron glass mold based on procast

为解决传统砂型铸铁玻璃模具铸件工艺出品率低、缩孔缩松等问题,采用液态模锻工艺成型,通过不同的冷却条件实现铸件石墨形态呈梯度分布。利用Procast对液态模锻过程的温度场和凝固场模拟,对缩孔缩松缺陷进行了预测,对浇注温度、冷却方式、浇口尺寸等关键工艺参数进行了调整优化,并根据热分析观点对铸件不同部位组织进行预测。结果表明,液态模锻可以有效减少缩孔缩松等铸造缺陷。

In order to solve the problems of low yield and easy shrinkage cavity and porosity in the traditional sand casting process of cast iron glass mold,the liquid die forging process was adopted,and the graphite shape of the casting was distributed in gradient by different cooling conditions.The temperature field and solidification field of liquid die forging process were simulated by Procast,shrinkage cavity and porosity defects were predicted,and the key process parameters such as pouring temperature,cooling mode and gate size were adjusted and optimized,and the microstructure of different parts of the casting was predicted according to the view of thermal analysis.The results show that liquid die forging can effectively reduce shrinkage defects.