(1. 清华大学 机械工程系，北京 100084；2. 清华大学 先进成形制造教育部重点实验室，北京 100084;
3. 沈阳黎明航空发动机(集团)有限责任公司，沈阳 110043)
摘 要: 采用商用软件ProCAST对调节片熔模铸造过程的应力进行数值模拟，分析调节片凝固过程中的应力变化情况，结果表明：裂纹缺陷处应力较大，凝固较慢。针对调节片裂纹的成因，提出在裂纹处增加内浇道的改进工艺方案，并对其在改进工艺下的铸造应力进行数值模拟。模拟结果表明：改进方案可明显减小原方案裂纹处的应力，消除该处裂纹缺陷，提高产品合格率。实际生产表明：改进方案明显消除了原方案的裂纹缺陷，合格率提高了30%。
关键字: 铸造应力；数值模拟；调节片；熔模铸造
（1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Key Laboratory for Advanced Materials Processing Technology, Ministry of Education,
Tsinghua University, Beijing 100084, China;
3. Shenyang Liming Aero-Engine (Group) Corporation, Shenyang 110043, China）
Abstract:The commercial software ProCAST was used to simulate the stress of adjustment sheets during the solidification, and then the stress change tendency of the adjustment sheets during the solidification was analyzed. The results indicate that the stress is bigger and the solidification is slower in the places where the crack defects may easily happen. The casting stress of an improved scheme for adjustment sheets was also simulated. The simulated results show that the improved scheme can reduce the casting stress and get higher yield. The real production indicates that the improved scheme can eliminate defect and increase the yield by 30%.
Key words: casting stress; numerical simulation; adjustment sheet; investment casting
