The invention relates to a high-yield
integrated processing technology of an ultra-fine
crystal magnesium alloy thin plate, and belongs to the technical field of plastic working of
magnesium alloys. A high-yield
processing method comprises the following steps of: firstly, carrying out equal channel angular pressing for a plurality of times; putting a
magnesium alloy billet into a preheated die to carry out heat preservation, and then carrying out equal channel angular pressing on the billet for more than eight times, so as to obtain an ultra-fine
crystal magnesium alloy block; and secondly, subsequently milling and
processing, rolling the ultra-fine
crystal magnesium alloy block obtained in the first step for a plurality of times, so as to prepare a
magnesium alloy thin plate, wherein the rolling temperature range is 100-350 DEG C. The magnesium
alloy micro-structure is refined by equal channel angular pressing to improve the plastic deformation ability, and then processed into the magnesium alloy thin plate and a wide plate by a
continuous rolling technology. Therefore, the produced magnesium alloy thin plate is an ultrafine-grained
microstructure, even in structure, good in strength and
plasticity, and high in yield.