Akademik Veri Yönetim Sistemi
International Journal of Metalcasting, cilt.18, sa.4, ss.3013-3027, 2024 (SCI-Expanded, Scopus)
In the high-pressure die casting method (HPDC), the determination of the cast-mold interface heat transfer coefficient (IHTC) is important for improving the part quality. This value varies depending on the casting temperature, mold temperature, injection pressure, injection velocity, mold design and various parameters. In this study, the IHTC and heat flux values during high-pressure die casting were determined using A384 alloy. In this direction, time-dependent temperature data were experimentally recorded with 18 thermocouples positioned on the mold and casting part, and the IHTC and heat flux were calculated with the program using the finite difference method. Studies were repeated depending on different injection pressure (80, 160 bar), injection velocity (1.5, 2.5 m/s), mold temperature (373, 453, 533 K) and casting temperature (973, 1033 K) parameters. In addition to experimental studies, ANSYS Fluent was used to simulate the HPDC process. Thus, simulations were carried out using the same parameters as in the experimental studies, and the results of the IHTC and heat flux values were determined. As a result of the studies, it was observed that increasing the injection pressure, injection second phase velocity, and casting temperature led to an increase in both the IHTC value and the heat flux. On the other hand, increasing the mold temperature had an inverse effect on these values and caused them to decrease. In addition to the aforementioned process parameters, it was shown through experimental studies that the IHTC and heat flux values increased when vacuum application was used.