The casting process design and casting process of high strength and Toughness Nodular Cast Iron for automobile hub support were studied by numerical simulation. Due to the limitation of time and research level, many contents in the paper still have deficiencies and still need to be further improved:
(1) Due to the limitation of software function, the model established by the simulation study ignores the possible inclusions and gases in the process of nodular cast iron casting, and considers the most ideal mold filling of nodular cast iron, so it may be a little different from the actual production process; If the processing method of actual multiphase flow can be considered, the simulation accuracy may be further improved.
(2) The residual stress in the process of nodular cast iron casting may have a certain impact on the quality of nodular cast iron, so the stress coupling calculation is helpful to further improve the quality of nodular cast iron.
(3) Although the possible shrinkage and shrinkage casting defects of automobile hub support are eliminated through simulation optimization, the simulation results cannot be verified due to the limitation of time and objective factors. In the follow-up, the trial production test of hub support can be further compared with the simulation results, and the effect of cooling rate on the microstructure and properties of nodular cast iron can be further studied.