摘要
针对涡轮后机匣支板熔模铸造工艺,利用ProCAST软件对铸件充型过程、型腔内压力演变、铸件缩松、缩孔缺陷等方面进行模拟,分析了缺陷形成原因。采用改进排气通道、调整支板浇注位置与时长、铸件凝固顺序等措施优化工艺,同时进行数值模拟。结果表明,优化工艺的充型过程稳定、型腔内未形成"憋气"现象,支板内无缩松、缩孔缺陷。经浇注验证,铸件质量满足ASTM E192标准要求。
In view of the investment casting process of turbine rear frame strut,the ProCAST software was adopted to simulate the filling process,cavity pressure evolution,and shrinkage cavity defects and the causes of the defects was analyzed.On this basis,the process was optimized by improving the exhaust passage,adjusting the pouring position,pouring time of the strut,and the solidification sequence of the casting,and the numerical simulation was carried out.The results indicate that the filling process of the optimized process is stable without"suffocation"phenomenon in the cavity and shrinkage and cavity defect in the strut.The actual casting verification demonstrates that the casting quality meets the ASTM E192 standard.
作者
杨新娣
田智星
路涵博
杨建鑫
张志坤
谢锦丽
Yang Xindi;Tian Zhixing;Lu Hanbo;Yang Jianxin;Zhang Zhikun;Xie Jinli(Gaona Aero Material Co.,Ltd.;Dekai Inteligent Casting Co.,Ltd.;Beijing Key Laboratory of Advanced High Temperature Materials,Central Iron and Steel Research Institute)
出处
《特种铸造及有色合金》
CAS
北大核心
2021年第9期1184-1188,共5页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金联合基金重点支持项目(U1708253)
国家重点研发计划资助项目(2017YFB0702901)。
关键词
涡轮后机匣支板
熔模铸造
数值模拟
Turbine Rear Frame Strut
Investment Casting
Numerical Simulation
