第2期 吉晓霞等：基于ProCAST软件优化压水堆核电站一回路弯管铸造工艺 ·147· 图6第二次改进工艺下弯管缩孔缩松预测图.()侧骨口缩孔缩松位置；(b)顶冒口缩孔缩松位置 Fig.6 Prediction charts of shrinkage cavities in the bent pipe based on the second optimization:a)the shrinkage and porosity positions in the inside risers of the bent pipe;(b)the shrinkage and porosity positions in the top risers on the bent pipe 图7第三次改进工艺下弯管凝固过程及缩孔缩松预测图.（a)12591s:(b)13091s;（c13591s:(d缩孔缩松预测图 Fig.7 Solidification process analysis as well as shrinkage and porosity prediction of the bend pipes based on the third optimization:(a)12591s; (b)13091 s:(c)13591 s:(d)shrinkage and porosity prediction (2)利用临界固相率法预测了弯管的缩孔缩松 提高90°弯管铸件的工艺出品率.模拟结果显示，管 缺陷，获得了无缩孔缩松的弯管铸造工艺. 腹、管背和管顶部冒口的最佳直径分别为360mm、 (3)研究结果表明，运用ProCAST软件有利于 330mm和340mm.第 2 期 吉晓霞等: 基于 ProCAST 软件优化压水堆核电站一回路弯管铸造工艺 图 6 第二次改进工艺下弯管缩孔缩松预测图 . ( a) 侧冒口缩孔缩松位置; ( b) 顶冒口缩孔缩松位置 Fig． 6 Prediction charts of shrinkage cavities in the bent pipe based on the second optimization: ( a) the shrinkage and porosity positions in the inside risers of the bent pipe; ( b) the shrinkage and porosity positions in the top risers on the bent pipe 图 7 第三次改进工艺下弯管凝固过程及缩孔缩松预测图 . ( a) 12 591 s; ( b) 13 091 s; ( c) 13 591 s; ( d) 缩孔缩松预测图 Fig． 7 Solidification process analysis as well as shrinkage and porosity prediction of the bend pipes based on the third optimization: ( a) 12 591 s; ( b) 13 091 s; ( c) 13 591 s; ( d) shrinkage and porosity prediction ( 2) 利用临界固相率法预测了弯管的缩孔缩松 缺陷，获得了无缩孔缩松的弯管铸造工艺． ( 3) 研究结果表明，运用 ProCAST 软件有利于 提高 90°弯管铸件的工艺出品率． 模拟结果显示，管 腹、管背和管顶部冒口的最佳直径分别为 360 mm、 330 mm 和 340 mm． ·147·