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经等离子重熔的Ａ１－１６Ｓｉ合金与电阻炉重熔的相比，组织有明显的细化效果：初晶Ｓｉ最大长度由１２０μｍ变为１０μｍ，共晶 Ｓｉ最大长度由 ７５ μｍ变为 ８ μｍ，并且这种细化效果随着放电电流和气流量的增大而增强，分析认为，造成组织细化的原因是由于等离子熔炼特殊的加热方式所致，等离子轰击作用能使熔体中保留遗传信息的原子团簇变小，微观结构更加均匀，
Compared with remelting of resistance furnace, the remelted Al-16Si alloy has obvious thinning effect: the maximum length of primary Si is changed from 120μm to 10μm, the maximum length of eutectic Si is changed from 75μm to 8μm, And this refinement effect increases with the increase of discharge current and gas flow. It is considered that the reason of the microstructure refinement is due to the special heating method of plasma melting. The plasma bombardment can make the melt retain the genetic information The atomic clusters become smaller and the microstructure more uniform.