The experimental setup in the study is consistent with the experimental setup described above, and the thermophysical parameters of relevant materials during the experiment.
Because the heat transfer coefficient and interface pressure of squeeze casting die interface change with space and time, in order to have a clear understanding of the relationship between them, not only a suitable model but also a large number of experimental data are needed. In the experiment of squeeze casting in this paper, the plate casting is used. For the parts with complex structure, the heat transfer between the part and the mold interface can be approximately considered to be composed of many small one-dimensional heat transfer units. Therefore, the plate casting is a very representative research object. Different interface contact pressures can be directly obtained by applying different applied pressures. Three kinds of external pressure (23 MPa, 46 MPa and 70 MPa) were used in squeeze casting.
The effects of pouring temperature 660 ℃, initial mold temperature 250 ℃ and applied pressure of 0, 23, 46 and 70 MPA on the heat transfer coefficient and pressure of squeeze casting die interface were studied. Three to four experiments were carried out under each condition. In addition, when the pouring temperature is 660 ℃ and the initial mold temperature is 190 ℃, 250 ℃ and 300 ℃, the squeeze casting experiments for different applied pressure are carried out. In the same way, the squeeze casting experiments with different applied pressure were carried out under the condition that the initial temperature of the die was 250 ℃ and the pouring temperature was 660 ℃, 700 ℃ and 720 ℃ respectively. Through these experiments, a large number of first-hand data have been obtained to study the relationship between the interfacial heat transfer coefficient and the interfacial pressure.