基于数值模拟技术的球铁壳体消失模铸造工艺优化

李晨至

摘　　要：针对消失模铸造球墨铸铁壳体铸件出现的缩孔缩松缺陷，对浇注温度、真空度、浇注系统及冒口进行改进，优化了生产工艺。模拟结果显示，经过改进浇注系统，金属液充型平稳，补缩效果良好，并有利于排气排渣。经生产验证，铸件质量完全满足生产要求。

Aiming at the shrinkage and dispersed shrinkage defects of lost foam casting ductile iron shell, the pouring temperature, vacuum degree, pouring system and riser were improved, and the production process was optimized. The simulation results show that the liquid metal filling is smooth, feeding efficiency is better, and the gating system is beneficial to exhaust and discharge by improving pouring system. The production practice shows that the quality of the castings can meet the production requirements.