ADC12 has high strength and wear resistance, and also excels in molten metal fluidity and fillability. In recent years, there has been an increasing demand for thinner and more complex parts. In this study, test pieces with thin walls were manufactured using two methods: molten metal forging and semi-solid forging. We present the results of an investigation into which processing method is more suitable for manufacturing thin-walled test pieces. For molten metal forging, experiments were conducted at a melting temperature of 610°C. For semi-solid forging, experiments were conducted at 568°C with a solid fraction of approximately 30%. The results showed that it was impossible to manufacture thin-walled test pieces using molten metal forging, but it was possible using semi-solid forging. It is thought that the molten metal cooled rapidly due to good contact with the mold. In contrast, the semi-solid slurry had high viscosity compared to the molten metal and poor contact with the mold, so it is thought that the temperature was maintained. During forging, the semi-solid slurry had better fluidity, which is thought to have led to these results.
ISHIKAWA et al. (Wed,) studied this question.