Effects of sulphur, titanium and zirconium on the shape of solid-liquid interface in Fe-c binary alloys

摘要

The effects of sulphur, titanium and zirconium on the shape of the eutectic solidification interface in Fe-C binary alloys were investigated by the quenching into ice water during unidirectional solidification. The oscillatory schematic model for graphite branching is proposed by considering the shape of the solidification interface and the protuberance length of the graphite flakes. The specimens contain 0.012, 0.108, 0.37 mass % S, 0.177 mass % Ti, and 0.078 mass % Zr, respectively. They are 80 g in weight, 18 mm in diameter, and 55 mm in length. The temperature gradient at the solid-liquid interface is about 2.5 K/mm.