，我们主要研究不同的铸造方法，并对受正确的铸造工艺和参数，对热理性能产品的影响，如结晶度、焊缝质量、材料的脆性的分析。
Introduction
Casting is a manufacturing process that involves the pouring of molten metal into a mold to give a desired shape. In this process, a precise temperature field is essential for a sound casting. The heat is transferred from the molten metal, to the mold and then to the atmosphere, according to the rate of heat dissipation from each medium. The temperature field during casting has a great influence on the crystallization, porosity and other important properties of casting products. In order to ensure the quality of the casting, it is critical to have a good understanding of the temperature field. This can be efficiently done by performing a numerical heat transfer analysis.
Overview of Casting Processes
The casting process can be mainly divided into two categories: sand casting and die casting.
• Sand Casting: This is a common casting process which uses sand as the mold material. In this process, the molten metal is poured into a sand mold which is formed by placing the pattern in the Casting. The heat is transferred from the molten metal to the mold and eventually to the atmosphere.
• Die Casting: In this process, a permanent metal mold is used to shape the molten metal and the temperature field is much more accurate than in sand casting. This is because the small thermal capacity of the metal mold can allow for better control of the temperature field.
Heat Transfer Heating Analysis
In order to get an accurate prediction of the temperature field during casting, it is necessary to perform a heat transfer heating analysis. This is an analysis which combines the basic principles of heat transfer with numerical methods to simulate the temperature distribution during heating. In order to perform this analysis accurately, two main components need to be taken into consideration: the convective and radiative heat transfer from the molten metal to the mold and from the mold to the atmosphere.
Convective Heat Transfer: Heat is transferred from the molten metal to the mold by convection, that is, the transfer of heat due to the movement of molecules. This is usually done by taking into account the temperature gradient, the velocity of the flowing fluid, and the change in temperature of the fluid.
Radiative Heat Transfer: Heat is also transferred from the molten metal to the mold by radiation, which is the transfer of heat energy through electro-magnetic waves. This can be done by taking into account the temperature of the emitting object, the radiation coefficient and the surface temperature of the receiving object.
Conclusion
In conclusion, heat transfer heating analysis is essential for the prediction of the temperature field during the casting process. This analysis includes the consideration of both convective and radiative heat transfer from the molten metal to the mold and from the mold to the atmosphere. The results of this analysis can be used to assess the effect of casting process parameters on the quality of the cast product such as crystallization, porosity, weld strength, and brittleness. This knowledge can then be used to optimize the process parameters for improved cast product quality.
