The basic theory and model solving process of flow field, temperature field and stress field simulation in metal casting process are introduced, as well as the factors affecting the simulation of flow field, temperature field and stress field. The formation mechanism and prediction method of shrinkage cavity and porosity casting defects in metal castings are studied. Explain from the following aspects:
(1) The basic equation of viscous fluid flow in liquid steel filling process is studied, and the advantages and disadvantages of two common methods of numerical simulation of filling process are analyzed.
(2) The mathematical model of heat transfer in the solidification process of metal castings is studied, the initial and boundary conditions in the heat transfer process are analyzed, and the definite solution conditions of the heat conduction process are found out. At the same time, the prediction method and judgment criteria of shrinkage cavity and porosity casting defects of steel castings are discussed.
(3) The THERMOELASTIC-PLASTIC model and THERMOELASTIC-PLASTIC constitutive equation for stress field analysis are studied, which lays a theoretical foundation for the subsequent simulation of stress and deformation.