Abstract
A sloping semisolid rheo-rolling process of Mg–3Sn–1Mn alloy was developed, and the effects of process parameters on the microstructure and mechanical properties of Mg–3Sn–1Mn alloy strip were studied. The results show that the primary grain average diameter of the strip increases with the increase of the roll speed. The primary grain average diameter decreases firstly and then increases with the increase of the vibration frequency, and the tensile strength and elongation of the strip increase firstly and then decrease with the increase of the vibration frequency. The primary grain average diameter increases with the increase of casting temperature, and the tensile strength and elongation of the strip decrease correspondingly. When the casting temperature is 670 °C, the roll speed is 52 mm/s, and the vibration frequency is 60 Hz, Mg–3Sn–1Mn alloy strip with good properties is produced. The mechanical properties of the present product are higher than those of Mg–3Sn–1Mn alloy casting with the addition of 0.87% Ce (mass fraction).
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