电磁搅拌对铝铜合金宏观组织及偏析的影响
Effect of Electromagnetic Stirring on Macrostructure and Segregation of Al-Cu Alloy
陈莉娟1 ， 李永晖2， 陶淑芬1
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作者单位：1.曲靖师范学院 物理与电子工程学院，云南 曲靖 655011； 2.云南大为化工装备制造有限公司，云南 曲靖 655338
中文关键字：电磁搅拌； 铝铜合金； 宏观组织； 偏析
英文关键字： electromagnetic stirring; Al-Cu alloy; macrostructure; segregation
中文摘要：为了改善铝铜合金在铸造过程中出现的密度偏析，研究了电磁搅拌对半固态Al-Cu合金宏观组织及偏析的影响。结果表明：电磁搅拌使得初生α-Al的径向分布更为均匀，改善了铸件的宏观偏析，且随着搅拌强度的增大，初生α-Al的分布也更均匀，即宏观偏析越小；电磁搅拌使得宏观组织显著细化，随着搅拌强度的提高，晶粒细化程度反而减弱。
英文摘要：In order to ameliorate gravity segregation of Al-Cu alloy during casting, the effects of electromagnetic stirring on the macrostructure and segregation of the alloy were investigated. The results show that the radial distribution of primary α-Al is more uniform under electromagnetic stirring, the macro-segregation improves, and the primary α-Al distributes more equally with the increase of stirring strength, that is to say, the improvement of the macro-segregation gradually increases; the electromagnetic stirring refines macrostructure obviously, and the size of macrostructure shows small variation with the increase of stirring strength.