Abstract
This paper focused on the development of Computational Fluid Dynamics (CFD) by a mathematical model based on the control volume method, which would enable efficient simulation of the semi-solid processing of complex industrial casting parts. Theoretical basis of the numerical simulation was briefly introduced. The latent heat was incorporated using the effective specific heat. The mass, momentum and enthalpy transport equation for each phase were solved. The application of the model allowed determining the temperature fields in the metal and the mold at 1 sec and the liquid fraction at time step 0.15 s with three different pressure regimes. The calculated pressure distribution and the evolution of liquid fraction through the material were examined and used to clarify their influence further investigated with tensile and hardness testing.
Highlights
Semi-solid casting process, as its name indicates, is the technological procedure for metals and alloys at semi-solid state
The semi-solid casting method can be devided on two principal kinds: rheo-casting and thixo-casting
Semi-solid casting method can be combined with others to develop new technologies such as rheo-die casting, compo-casting etc
Summary
Semi-solid casting process, as its name indicates, is the technological procedure for metals and alloys at semi-solid state. This process was innovated at Massachussets Institute of Technology (MIT) in the 70’ years of previous century [17]. It has been the only casting process which gives the nodular structure instead of the dendritic one. Semi-solid casting method can be combined with others to develop new technologies such as rheo-die casting, compo-casting etc. Some authors named their technology “nano-casting” too
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