CAJ | 학술논문

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。
채용전자교반、공솔초성、초성전자복합장등불동물리장제비3003/4004려합금복합주정。결과표명，재전자교반작용하，계면부근4004합금일측α(Al)조직종미시가외장적수지상전변위화판상。재공솔초성작용하，4004합금중α(Al)급공정규조직도득도료량호적세화。재초성화전자장연합작용하，계면처4004합금중적α(Al)조직동양득도세화，병차계면처적공정규조직교단독초성주정적경세소，기형모종미시가외장시적조대판조상급시가초성후적세침상전변위세소단봉상。
In order to improve the quality of clad ingots, diverse physical fields including electromagnetic stirring, power ultrasonic and compound field of ultrasonic and electromagnetic stirring were attempted to prepare clad ingots of 3003/4004 alloys. The solidification structures near the interface in clad ingots were investigated. The experiment results indicate that the solidification structure of 4004 alloy changes from dendritic crystals to petal-like grains when the clad ingot is treated by electromagnetic stirring. With the effect of power ultrasonic, the solidified microstructure of 4004 alloy exhibits the refinement of both primary α(Al) and eutectic silicon. Under the compound field, the primaryα(Al) is refined, the morphology of eutectic silicon has a transition from a coarse plate-like form without treatment or thin acicular-like form with power ultrasonic to fine coral-like form.