In zinc alloy die casting, soldering reactions caused by the fusion of the die-surface are, a serious problem in the manufacturing process because they lead to reduced in production efficiency. It is very important to clarify the mechanism of soldering reactions from the physical and chemical perspectives in order to prevent or reduce zinc soldering on the die surface. In this study, experiments to observe the mechanism of soldering reactions were performed using an actual die casting machine. Transmission Electron Microscope (TEM) observation and Energy Dispersed Spectroscopy (EDS) analyses were performed to investigate the interface between the die material and molten zinc alloy and to observe the mechanism of soldering reactions.
