电磁搅拌参数对Cu-6%Ag合金凝固组织及性能的影响

Influence of Electromagnetic Stirring Parameter on the Solidified Structure and Properties of Cu-6%Ag Alloys

为了细化Cu-Ag合金,进一步提高合金性能,在不同电磁搅拌参数下制备了Cu-6%Ag合金。结果表明,随着电磁搅拌频率和电流增加,合金晶粒明显细化。初生Cu枝晶转变成等轴晶和胞晶,并且胞晶中的Ag元素含量降低明显。枝晶状初生Cu相有利于合金硬度升高,等轴晶状Cu相有利于提高合金的电导率。

In order to refine Cu-Ag alloy and further improve the properties, Cu-6%Ag alloy was prepared under different electromagnetic stirring parameters. The results show that with the increase of electromagnetic stirring frequency and current, the grain size of the alloy is obviously refined. The primary Cu dendrites are transformed into equiaxed and cellular crystals, and the Ag content in the cellular crystals decrease significantly. Dendritic Cu phase is beneficial to increase the hardness of the alloy, and equiaxed Cu phase is beneficial to increase the conductivity of the alloy.