Because of the higher content of Mn in the alloy ( 0.48% ), the acicular phase becomes skeletonized phase (Al0Si2 Fe2-AlSiMnFe ) so that the toughness of alloy is increased.

• 由于合金中含有较高的锰量(Mn0.；48%25)；针状的Al_9Si_2Fe_2相转变为骨骼状的AlSiMnFe相；从而改善了合金的塑性。