【摘要】 用于化工泵设备中的CF8不锈钢泵体铸件一般在酸性的环境下工作，铸件内部质量和表面粗糙度要求较高，结构复杂，成形难度较大，一般通过熔模铸造生产。针对试产中该铸件产生的缩孔缩松缺陷，采用ProCAST软件进行了数值模拟分析，找到了初始工艺方案下产生缺陷的原因，并通过对浇注和补缩系统进行合理的改进，优化了铸造工艺设计。数值模拟和工艺实施结果证明了优化方案的可行性，获得了满足客户质量要求的泵体铸件。更多还原

【Abstract】 The CF8 stainless steel pump body castings are used for the pump equipments of chemicals and generally work in an acidic environment, and their internal quality and surface roughness are often highly required. Due to the complexity of their structures and the difficulty of their forming, they are usually produced through investment casting. Aiming at the shrinkage cavity and shinkage porosity defects generated in the castings during trial production, the numerical simulation analysis was conducted by using of ProCAST software, and the causes of the defects under the initial process plan were identified. Then the investment casting process design was optimized through reasonable improvements to the gating and feeding systems. The feasibility of the optimization process plan was demonstrated by the results of numerical simulation and process implementation, and the pump body castings met the customers′ quality requirements were produced.更多还原