大型不锈钢汽轮球阀结构复杂、壁厚不均,存在孤立热节,熔模铸造时存在局部缩松。借助ProCAST软件,在分析原有工艺方案的基础上,对浇冒系统的结构进行了重新设计,并采用特殊方法引入铸造冷铁,使铸件实现自下而上的顺序凝固,成功消除了球阀铸件孤立热节处的缩松缺陷,提高了产品的合格率。 Large-scale stainless steel steam ball valve structure is complex, uneven wall thickness, there is isolated hot section, there is a partial shrinkage when investment casting. With ProCAST software, based on the analysis of the original process plan, the structure of the rigging system was redesigned and a special method was adopted to cast chilled iron so that the castings solidified in the bottom-up order successfully eliminated the ball valve castings Isolated hot section at the shrinkage defects, improve the product pass rate.