Modeling of shrinkage during investment casting of thin-walled hollow turbine blades

被引：78

作者：

Dong, Y. W. ^{[1
,2
,3
]}

Li, X. L. ^{[1
]}

Zhao, Qi ^{[1
]}

Yang, Jun ^{[3
]}

Dao, Ming ^{[3
]}

机构：

[1] Xiamen Univ, Sch Aerosp Engn, 422 South Siming Rd, Xiamen 361005, PR, Peoples R China

[2] Xiamen Univ, Shenzhen Res Inst, 19, Gaoxin South 4th Rd, Shenzhen 518057, PR, Peoples R China

[3] MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2017年 / 244卷

关键词：

Dimensional shrinkage; Structural identification; Deformation decoupling; Hollow turbine blade; Investment casting die; DIE PROFILE;

D O I：

10.1016/j.jmatprotec.2017.01.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The shrinkage ratio is a key parameter in designing the investment casting die for hollow turbine blades of high-performance aircraft engines. To avoid extensive modifications to the die shape, we took a single crystal hollow turbine blade as the typical part to determine the nonuniform shrinkage distribution while considering its structural characteristics during investment casting. By using the structural identification method, different geometrical structures were identified, and the displacement field was established and verified via numerical prediction and experimental measurement. The deformation characteristics, including the wall-thickness distribution and shrinkage ratio, can be established by deformation decoupling analysis. The optimized die profile designed on the basis Of the calculation results is in good agreement with the investment casting die in actual use, which indicates that the proposed method is beneficial for improving the geometrical accuracy of hollow turbine blades. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：190 / 203

页数：14