【摘要】 采用ProCAST软件对稀土钇铸锭铸造工艺进行数值模拟，研究不同工艺对钇铸锭充型凝固过程中温度场分布、固相率分布和缩孔缺陷分布影响。计算和试验结果表明：初始工艺方案的数值模拟结果与实际铸锭产生的缩孔位置基本一致；改进冒口设计，当保温冒口的高度为100 mm时，钇铸锭中的缩孔缺陷率最小，缺陷体积减少了98%以上。更多还原

【Abstract】 The ProCAST software is used to numerically simulate the casting process of the rare-earth yttrium ingots to study the effects of different processes on the temperature field distribution, solid fraction distribution and distribution of shrinkage defects in the process of mold filling and solidification of yttrium ingots. The calculation and test results show that the numerical simulation results of the initial process scheme are basically consistent with the location of the shrinkages produced by the actual ingot; after improving the riser design, the shrinkage defect rate in the yttrium ingot is the smallest when the height of the insulating riser is 100 mm, and the defect volume is reduced by more than 98%.更多还原