Valve body isprone to shrinkage porosity

shrinkage and other defectsin the casting process. After three-dimensional modeling and meshing of the valve body parts

the filling and solidification process were simulated based on ProCAST software to predict the possible positions of shrinkage porosity

shrinkage cavity and other defects in the casting process. According to the simulation results

the gating system

pouring temperature

and process scheme was optimized to reduce the occurrence of defects

improving the casting quality. The results indicate that when the top gating system is used with filling time of 13.4 s and the pouring temperature controlled at 1 550 ℃

the filling process is stable

and the shrinkage defects are effectively controlled.