本发明公开了一种轮毂用镁合金，其化学元素质量百分比为：Al：4.5～9.5wt％，Mn：0.2～0.9wt％，Ca：0.2～1.9wt％，Zn：0.2～1.0wt％，0＜Fe≤0.007wt％，Ni≤0.007wt％，Cu≤0.007wt％，余量为Mg和其他不可避免的杂质；其中各化学元素还满足下列各项的至少其中之一：Mn/Fe>40；Ca/Al：0.03‑0.2；Fe+Ni+Cu≤150ppm。此外，本发明还公开了一种轮毂，其采用上述的轮毂用镁合金制得。另外，本发明还公开了一种上述的轮毂的制造方法，其包括步骤：(1)熔铸；(2)热处理；(3)锻造；(4)精加工和涂装。

The invention discloses a magnesium alloy for wheel hub. The mass percentage of chemical elements is: Al: 4.5 ~ 9.5wt%, Mn: 0.2 ~ 0.9wt%, CA: 0.2 ~ 1.9wt%, Zn: 0.2 ~ 1.0wt%, 0 < Fe ≤ 0.007wt%, Ni ≤ 0.007wt%, Cu ≤ 0.007wt%, and the balance is mg and other inevitable impurities; Each chemical element also meets at least one of the following: Mn / Fe > 40; Ca/Al：0.03‑0.2； Fe+Ni+Cu≤150ppm。 In addition, the invention also discloses a wheel hub, which is made of magnesium alloy. In addition, the invention also discloses a manufacturing method of the wheel hub, which comprises the following steps: (1) melting and casting; (2) Heat treatment; (3) Forging; (4) Finishing and painting.