Abstract
Continuous strip casting method attracts attention as the integrated production process in wrought Magnesium alloys. In this research, AZ61 sheet was cast from molten metal by twin-roll strip casting and the characteristics were analyzed. Experimental parameters were roll gap, roll speed and molten temperature, and the effects of these parameters on surface aspect and microstructure were investigated. Obtained results are as follows: (1) Wrinkle and crack of sheet surface were improved as roll speed increased. (2) The grain size was fined as roll gap, roll speed and molten temperature decreased, and the finest average grain size was about 20μm. (3) Eutectoid Mg_<17>Al_<12> mainly precipitated in grain boundary and that could be soluble in grain by heat treatment (400T℃/3.6ks).
