Furthermore, the suitable dosage of mischmetal addition has also been tested.

另外，还对混合稀土的适宜加入量进行了试验。

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It was found that under different amounts of mischmetal addition, their contents did not exceed 1.6% for pure magnesium and 1.9% for AZ91D alloy in the experiments.

镁熔体对混合稀土存在着吸收极限，该试验条件下纯镁的吸收极限为1．6％左右，AZ91D合金的吸收极限为1．9％左右；

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