Numerical Simulation of Solidification Process on Single Crystal Ni-Based Superalloy Investment Castings

材料科学技术（英文）, 2007, 23(1): 47-54.

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1.Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

2.Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

3.Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

4.Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

5.Ishikawajima-Harima Heavy Industries Co., Ltd., Isogo-Ku, Yokohama 235-8501, Japan

6.Ishikawajima-Harima Heavy Industries Co., Ltd., Isogo-Ku, Yokohama 235-8501, Japan

7.Ishikawajima-Harima Heavy Industries Co., Ltd., Isogo-Ku, Yokohama 235-8501, Japan

基金项目: Tsinghua-IHI Research Funds 国家自然科学基金(10477010) 国家重点基础研究发展计划(973计划)(2005CB724105)

Numerical Simulation of Solidification Process on Single Crystal Ni-Based Superalloy Investment Castings

Keywords： Directional solidification

Bridgman directional solidification of investment castings is a key technology for the production of reliable and highly efficient gas turbine blades. In this paper, a mathematical model for three-dimensional (3D) simulation of solidification process of single crystal investment castings was developed based on basic heat transfer equations. Complex heat radiation among the multiple blade castings and the furnace wall was considered in the model. Temperature distribution and temperature gradient in superalloy investment castings of single blade and multiple ones were investigated, respectively. The calculated cooling curves were compared with the experimental results and agreed well with the latter. It is indicated that the unsymmetrical temperature distribution and curved liquid-solid interface caused by the circle distribution of multiple turbine blades are probably main reasons why the stray grain and other casting defects occur in the turbine blade.

参考文献

[1]	W R Wilcox .[J].Journal of Crystal Growth,1980,48:416.
[2]	R J Naumann .[J].Journal of Crystal Growth,1982,58:554.
[3]	T Jasinski .[J].Journal of Crystal Growth,1983,61:339.
[4]	T Jasinski;R J Naumann .[J].Journal of Crystal Growth,1984,66:469.
[5]	K O Yu;M J Beffel;M Robinson;D D Goettsch,B G Thomas,D Pinella and R G Carlson .[J].Trans Am Found Soc,1990,53:417.
[6]	K O Yu;J A Oti;M Robinson;R G Carlson.[A].Champion,PA,USA,1992:135.
[7]	M Saitou;A Hirata .[J].Journal of Crystal Growth,1991,113:147.
[8]	L. M. Galantucci;L. Tricarico .A computer-aided approach for the simulation of the directional-solidification process for gas turbine blades[J].Journal of Materials Processing Technology,1998(1/3):160-165.
[9]	D Wang;R A Overfelt.[A].San Diego,2001:461.
[10]	J D Zhu;I Ohnaka;K Kudo;S Obara,A Qimatsuka,T M Wang,F Kinoshita and T Murakami.[A].U S A,2003:447.
[11]	Jiarong LI,Shizhong LIU,Zhengang ZHONG.Solidification Simulation of Single Crystal Investment Castings[J].材料科学技术学报(英文版),2002(04):315-318.
[12]	Jiarong LI,Shizhong LIU,Hailong YUAN,Zhengang ZHONG.Solidification Simulation of Investment Castings of Single Crystal Hollow Turbine Blade[J].材料科学技术学报（英文版）,2003(06):532-534.
[13]	Z J Liang;J R Li;B C Liu;Q Y Xu,H L Yuan and S Z Liu.Multiph Phenom Model Simul Mater Process[M].TMS,Charlotte,2004:227.
[14]	Weiheng JIANG.Heat Transfer[M].北京:高等教育出版社,1989:172-190.
[15]	R Siegel;J R Howell.Thermal Radiation Heat Transfer[M].Braun-Brumfield,Inc,USA,1992

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Numerical Simulation of Solidification Process on Single Crystal Ni-Based Superalloy Investment Castings

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