J Mater Sci Technol ›› 2003, Vol. 19 ›› Issue (06): 532-534.

• Research Articles • Previous Articles     Next Articles

Solidification Simulation of Investment Castings of Single Crystal Hollow Turbine Blade

Jiarong LI, Shizhong LIU, Hailong YUAN, Zhengang ZHONG   

  1. National Key Laboratory of Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-11-28 Published:2009-10-10
  • Contact: Jiarong LI

Abstract: The three-dimensional solidification simulation of the investment castings of single crystal hollow turbine blade at the withdrawal rates of 2 mm/min, 4.5 mm/min and 7mm/min has been performed with the finite element thermal analysis. The calculated results are in accordance with the experimental ones. The results show that with the increase of withdrawal rate the concave curvature of the liquidus isotherm is larger and larger, and the temperature gradients of the blades increase. No effects of withdrawal rate on the distribution of the temperature gradients of the starter and helical grain selector of the blades are observed at withdrawal rates of 2 mm/min, 4.5 mm/min and 7 mm/min. The relatively high temperature gradient between 500ºC/cm and 1000 ºC/cm in the starter and helical grain selector is obtained at three withdrawal rates.

Key words: Single crystal, Hollow turbine blade, Solidification simulation