Numerical Simulation Study of Precision Casting Process for Iron-Base Superalloys Blade

The mold filling and solidification process of K213 superalloy in the precision investment casting with typical blade are simulated by using the MAGMA casting simulation software; and the fluid velocity field, solid fraction, temperature field distribution and gaps during the solidification process are analyzed. The simulation results show that, the alloy liquid of the blade part is always in a high temperature with 1 500℃ during the pouring process; after 3 seconds, the blade edge starts to cool down first with the minimum temperature of 1 400℃, but it is still higher than the alloy melting point, so it is not easy to have defects in this part. After 15 seconds of punching, the temperature at the edge of the blade decreases to about 1 230℃. After 15 minutes, the temperature at the center of the connection between the gate and the transverse runner is still around 1 300℃, and it is below the melting point at other parts, indicating that the feeding function can still continue. A small amount of solidification defects are mainly concentrated on the surface of the blade root in the casting process, which has no impact on the overall performance, indicating that the designed gating system can meet the requirements of blade precision casting production.