Experimental Study and Numerical Simulation of Directionally Solidified Turbine Blade Casting

材料科学技术（英文）, 2008, 24(3): 369-373.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

2.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

3.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

4.Beijing Institute of Aeronautical Materials, Beijing 100095, China

5.Beijing Institute of Aeronautical Materials, Beijing 100095, China

6.Beijing Institute of Aeronautical Materials, Beijing 100095, China

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

Experimental Study and Numerical Simulation of Directionally Solidified Turbine Blade Casting

Jing YU ^1, , Qingyan XU ^2, , Baicheng LIU ^3, , Jiarong LI ^4, , Hailong YUAN ^5, , Haipeng JIN ^6,

1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

2.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

3.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

4.Beijing Institute of Aeronautical Materials, Beijing 100095, China

5.Beijing Institute of Aeronautical Materials, Beijing 100095, China

6.Beijing Institute of Aeronautical Materials, Beijing 100095, China

Keywords： Turbine blade casting

The directional solidification process of turbine blade sample castings was investigated in the work. Variable withdrawal rates were used in one withdrawal process and compared with the other using uniform rate. A mathematical model for heat radiation transfer and microstructure simulation of directional solidification process was developed based on CA-FD method. The temperature distribution and microstructure were simulated and compared with the experimental results. The stray grains were predicted and compared with the experimental results. The uneven temperature distribution of platform was the main reason of the formation of stray grains.

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