旋转与脉冲磁场对Zn-2.75%Cu包晶合金凝固组织的影响  

Effect of Rotating and Pulsed Magnetic Field on Solidification Microstructure of Zn-2.75%Cu Peritectic Alloy

作　　者：谢嘉玮 阎志明[1] 史振宗 XIE Jiawei;YAN Zhiming;SHI Zhenzong(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,Liaoning China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《铸造工程》2024年第5期1-5,共5页Foundry Engineering

基　　金：国家自然科学基金(电磁扰动耦合异相纳米粒子对Zn-Cu包晶合金晶粒细化机理研究)(51204028)。

摘　　要：研究了旋转磁场和脉冲磁场对Zn-2.75%Cu包晶合金凝固组织的影响。结果表明:Zn-2.75%Cu合金凝固组织是由初生树枝状和球状ε-CuZn5相和基体η相组成,其靠近试样边部的树枝晶更为粗大。施加旋转磁场和脉冲磁场后,Zn-2.75%Cu包晶合金组织中粗大发达树枝晶逐渐细化,转变为细小均匀的球状和蔷薇状组织;ε相变得细小圆整,尺寸减小,向等轴晶转变,分布更为均匀,且数量明显减少;中心处的初生ε相较于边缘处皆更为细小,数量更少。施加旋转磁场细化作用效果更为明显,树枝晶完全转变。The effects of rotating magnetic field and pulsed magnetic field on the solidification structure of Zn-2.75%Cu peritectic alloy were studied.The results show that the solidification structure of Zn-2.75%Cu alloy is composed of primary dendritic and sphericalε-CuZn5 phase and matrixηphase,and the dendrites near the edge of the sample are coarser.After applying rotating magnetic field and pulsed magnetic field,the coarse and developed dendrites in the Zn-2.75%Cu peritectic alloy are gradually refined and transformed into fine and uniform spherical and rose-like structures.Theεphase becomes fine and round,the size decreases,and it changes to equiaxed crystal,the distribution is more uniform,and the number is significantly reduced.The primaryεphase at the center is smaller and fewer than that at the edge.The refinement effect of rotating magnetic field is more obvious,and the dendrite is completely transformed.

关 键 词：Zn-2.75%Cu包晶合金 旋转磁场 脉冲磁场 

分 类 号：TG146.1[一般工业技术—材料科学与工程]