Abstract：:In this paper, the microstructure of AZ31 magnesium alloy after asynchronous rolling with single-pass large deformation was studied.One strip of secondary asynchronous rolling with pressing rates of 23.7%, 30.5% and 36.4%.With the increase of the pressing rate, the grain of the plate is significantly refined.When the pressing rate was 36.4%, the grain was refined from 10.9 m to 3.8 m, and the microstructure of the hot-rolled sheet was not uniform.It is composed of three different grains: coarse grain, small dynamic recrystallization new grain and twin.The causes of microstructure changes were analyzed.
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2021, Vol. 28 