涡轮后机匣支板熔模铸造工艺数值模拟及优化

杨新娣; 田智星; 路涵博; 杨建鑫; 张志坤; 谢锦丽

doi:10.15980/j.tzzz.2021.09.026

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涡轮后机匣支板熔模铸造工艺数值模拟及优化
Numerical Simulation and Optimization of Investment Casting Process of Turbine Rear Frame Strut
2021年41卷第9期页码：1184-1188
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.09.026

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杨新娣, 田智星, 路涵博, 等. 涡轮后机匣支板熔模铸造工艺数值模拟及优化[J]. 特种铸造及有色合金杂志, 2021,41(9):1184-1188.

Yang Xindi, Tian Zhixing, Lu Hanbo, et al. Numerical Simulation and Optimization of Investment Casting Process of Turbine Rear Frame Strut[J]. Special Casting & Nonferrous Alloys, 2021,41(9):1184-1188.
杨新娣, 田智星, 路涵博, 等. 涡轮后机匣支板熔模铸造工艺数值模拟及优化[J]. 特种铸造及有色合金杂志, 2021,41(9):1184-1188. DOI： 10.15980/j.tzzz.2021.09.026.

Yang Xindi, Tian Zhixing, Lu Hanbo, et al. Numerical Simulation and Optimization of Investment Casting Process of Turbine Rear Frame Strut[J]. Special Casting & Nonferrous Alloys, 2021,41(9):1184-1188. DOI： 10.15980/j.tzzz.2021.09.026.

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。

Abstract

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.