A simulation software

HRSCAE

for temperature field in HRS directional solidification process is developed based on preparation process of turbine blade with columnar crystal. The effects of varied drawing velocity

heating and cooling rate on distribution of temperature field in turbine blade with columnar crystal and liquid-solid interface morphology are examined by orthogonal testing method. The results indicate that the drawing velocity is dominant in influencing casting quality. The drawing velocity is controlled to make the interface always be adjacent to the isothermal zone

which can keep the solid-liquid interface to be flat for a long time. It is more favorable for the growth of the columnar crystal with the solid-liquid interface more adjacent to the isothermal zone. The simulation provides some ways to exactly control parameters and to solve divergence problems in real production to produce the high quality columnar crystal with smooth surface.