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采用电磁搅拌、功率超声、超声电磁复合场等不同物理场制备3003/4004铝合金复合铸锭。结果表明,在电磁搅拌作用下,界面附近4004合金一侧α(Al)组织从未施加外场的树枝状转变为花瓣状。在功率超声作用下,4004合金中α(Al)及共晶硅组织都得到了良好的细化。在超声和电磁场联合作用下,界面处4004合金中的α(Al)组织同样得到细化,并且界面处的共晶硅组织较单独超声铸锭的更细小,其形貌从未施加外场时的粗大板条状及施加超声后的细针状转变为细小短棒状。
3003/4004 aluminum alloy ingot was prepared by different physical fields such as electromagnetic stirring, power ultrasonic wave and ultrasonic electromagnetic compound field. The results show that the α (Al) microstructure on the side of 4004 alloy near the interface changes from the dendritic shape without applied external field to the petal shape under electromagnetic stirring. Under the action of ultrasonic power, α (Al) and eutectic silicon in 4004 alloy have been well refined. Under the combined action of ultrasonic and electromagnetic field, the α (Al) microstructure of the 4004 alloy at the interface is also refined, and the eutectic silicon structure at the interface is finer than that of the single ultrasonic ingot. The thick slats and fine needle after applying ultrasound changed into small short rods.