The effects of processing parameters on the ZM5 gear shell were investigated by product structural analysis and ProCAST simulation.The results reveal that the gear shell with the thickness of 15

2

5 mm and overall dimensions of 160 mm×100 mm×80 mm

can be well produced with pouring at 700℃for 6 sand setting two slit gate.However

porosity can be found in the concave position at thick wall of castings.According to the simulation results of proCAST and the actual production

the defects were obviously reduced by optimizing the casting process

such as adopting ceramic fiter

adding partial chill and increasing the pouring temperature.The chemical composition

mechanical properties

dimensional accuracy can all meet the product standard.