Magnesium-zirconium intermediate alloy and preparation method thereof

The invention relates to a magnesium-zirconium intermediate alloy and a preparation method thereof.The preparation method comprises the following steps that magnesium metal is smelted under the high-frequency induction condition, and a first melt is obtained; metal zirconium is added into the first melt, alternate stirring is conducted under the low-frequency induction condition, and a second melt is obtained; the alternate stirring comprises first stirring, second stirring and third stirring; the first stirring direction is that the upper-layer melt flows upwards from the center and downwards from the side wall, and the lower-layer melt flows upwards from the side wall and downwards from the center; the second stirring direction is that the melt flows upwards from the side wall and flows downwards from the center; the third stirring direction is that the melt flows upwards from the center and flows downwards from the side wall; and under the action of third stirring, the second melt is subjected to fixed-poi