【摘要】 高温合金定向凝固过程中存在着传热、流动、传质的宏观传输，凝固收缩、补缩，溶质再分配、迁移，晶粒生长和熔化等行为共同作用下的多相共存、多物理场耦合作用、跨尺度的复杂过程，导致复杂形状叶片铸件中频繁出现杂晶、雀斑、小角度晶界、条纹晶等缺陷。由于过程的不透明以及合金的高成本，发展数值模拟技术对深入认识高温合金定向凝固过程的机理、建立精准有效的控制方法具有重要意义。综述了近年来在镍基高温合金定向凝固数值模拟领域相关的研究进展，并对其应用进行了展望。更多还原

【Abstract】 In the directional solidification of superalloy, there exists a complicated process of multi-phase coexistence, multi-physical field interaction and cross-scale interaction under the synergy of heat transfer, flow, mass transfer, solidification shrinkage, reinforcement, solute redistribution, migration, grain growth and melting, leading to frequent defects such as mixed crystal, freckle, small angle grain boundary and striation in blade castings with complex shape. Due to the oblique process and high cost of superalloys, numerical simulation technique is of great significance for the in-depth understanding and establishing specific and effective control of directional solidification process. The research progress in numerical simulation of superalloys during directional solidification were reviewed, and the application was prospected.更多还原