对于大型复杂零件的铸造,采用铸造模拟软件进行缺陷分析和结构优化,能避免传统设计方法依靠工程经验和工艺试验所带来的设计风险和制造成本。运用CASTsoft软件模拟了一种不锈钢精密铸造的过程,并对其充型和凝固过程中的温度场进行了分析,得出了铸件的缺陷分布。结果能为铸件的结构和工艺优化提供分析依据。 For the casting of large and complex parts, casting simulation software for defect analysis and structural optimization can avoid the design risk and manufacturing cost that traditional design methods rely on engineering experience and process test. CASTsoft software was used to simulate a stainless steel precision casting process, and its filling and solidification process of the temperature field were analyzed to obtain the casting defect distribution. The result can provide the analysis basis for the structure and process optimization of the castings.