Ductile cast iron wheel was manufactured by lost foam casting.The process of lost foam casting was analyzed systematically.The filling

solidification and temperature field distribution in the iron wheel during pouring process were simulated by Anycasting software.The microstructure and defects in the castings were investigated by XRD and scanning electron microscope（SEM/EDS）.The results show that the filling velocity in the designed feed system is improved greatly by vacuum pressure

and some sand sticking and hole defects can be observed in some castings due to the low refractoriness of sintered coating layer.