The invention relates to a microscale Al-containing
rare earth wrought
magnesium alloy and its preparation method and belongs to the scope of industrial
magnesium alloy. The
magnesium alloy comprises, by weight, 6.5-15.0% of Gd, 3.0-5.5% of Y, 2.0-4.0% of Zn, 0.3-1.5% of Nd, 0.3-0.9% of Zr, 0.4-1.0% of Al and the balance of Mg. The preparation method of the
magnesium alloy comprises the steps as follows:
raw material preparation, alloy melting, alloy semi-
solid extrusion, homogenization treatment, redeformation, cooling and pre-stretching treatment,
ageing strengthening treatment and the like. By fully utilizing the defect that Al is preferentially combined with
rare earth and Zr in alloy to form a
stable phase,
Zn element is added to make up insufficiencies and the wrought
magnesium alloy with high performance is prepared. The
recovery effect of
rare earth elements is enhanced, and semi-
solid forming and
solid plastic forming are combined.