Interfacial heat transfer coefficient of casting metals has a great influence on the casting solidification process. Especially in the process of casting metals, casting interface often comes into being gaps which are the control factors of heat transfer for solidification process. At the same time, the interfacial heat transfer coefficient is one of the essential boundary conditions for computer solidification simulation. The accuracy will directly affect the reliability of numerical simulation. In the actual casting metals solidification process, the interfacial heat transfer coefficient changes with the temperature and the different process conditions. Thus the exact solution is relatively difficult.

Interface heat transfer coefficient of casting metals solidification is not a constant. It is the function which changes over time. It will decrease to a stable value with the increase of solidification time. In the process of actual simulation, most of the simulation softwares set the interfacial heat transfer coefficient to a constant value, which creates a larger deviation between the simulation results and the actual results. To get accurate interfacial heat transfer coefficient has important application value and referential meaning for the casting metals simulation process.