Ironmaking and steelmaking process research on Chinese long ring pommel Dao in Han dynasty.

The long ring pommel Dao (a kind of single-edged blade), a significant indigenous Chinese weaponry innovation of the Western Han Dynasty, is researched this study. Employing a comparative research methodology, we conduct a scientific analysis of samples excavated from the tombs of marquisates across various regions of China, spanning from the northern to the southern extremities. This analysis encompasses metallographic examination, inclusion composition analysis, and scanning electron microscopy (SEM), complemented by the application of a metallurgical kinetic model to reconstruct key smelting operations.

Al Alloy Melting Behavior and Interfacial Reactions with Steel Under Natural Convection.

The Al alloy melting behavior and interfacial reactions during the steelmaking process of high-Al automotive steel were investigated in this study. The total dissolution time of Al bars (20 × 20 × 80 mm) in molten steel was quite short, decreasing from 21.4 s to 10.