Temperature distribution and its influence on microstructure of Mg–3Sn–1Mn alloy during rheo-rolling process

ABSTRACT

In this paper, an innovative semisolid rheo-rolling process of Mg–3Sn–1Mn alloy was proposed; the temperature distribution and its influence on microstructure of Mg–3Sn–1Mn alloy during the semisolid rheo-rolling process were studied. The alloy temperature decreased gradually from the entrance to the exit of the slope plate, and the alloy velocity increased gradually. The temperature of the alloy near the slope plate surface was lower than that of melt surface. The alloy temperature decreased gradually from the entrance to the exit of the roll gap. In the roll gap, the nearer the roll was, the lower the alloy temperature was. With the increment of casting temperature, the semisolid zone increased and moved forward from the filling mouth to the exit of the roll gap. When the casting temperature was 670°C and the roll speed was 0.052 m/s, Mg–3Sn–1Mn alloy strip with good surface quality was obtained. Homogeneous microstructure was obtained. Mechanical properties of the present product at room temperature or 150°C are higher than that of Mg–3Sn–1Mn–0.87Ce prepared by casting.

KEYWORDS:

• Semisolid
• rheo-rolling
• Mg–3Sn–1Mn alloy
• temperature
• simulation

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors gratefully acknowledge funding of National Natural Science Foundation of China (51604246 and 51775521) and the fund of the State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology (SKLAB02015005), and the support of the North University of China for Young Academic Leaders.