中频感应熔铸Al-Si-Cu-xSn铝合金组织演变分析  

Analysis of Microstructure Evolution of Al-Si-Cu-xSn Aluminum Alloy by Medium Frequency Induction Melting

作　　者：李贵胜 Li Guisheng(Department of Mechanical and Electrical Engineering,Pingdingshan Vocational and Technical College,Pingdingshan Henan 467000,China)

机构地区：[1]平顶山职业技术学院机电工程系,河南平顶山467000

出　　处：《山西冶金》2025年第1期26-28,共3页Shanxi Metallurgy

基　　金：河南省科技攻关项目(242102320158)。

摘　　要：稀有元素的添加能够有效激活Al-Si系列的亚共晶组织。通过中频感应熔铸制备了Al-Si-Cu-xSn铝合金,通过实验手段分析Sn含量对铝合金组织演变的影响。研究结果表明:铝合金基体内存在大量无序分布形态的树枝状结构,形成稳定尺寸晶粒;w(Sn)为0.8%时,二次枝晶间距减小至5.86μm;随着w(Sn)达到0.8%时,在铝合金中几乎没有大尺寸的共晶硅,主要包含众多细小片层,边缘也变得更加钝化。合金中除α(Al)和Si物相外,还产生了Al2SiSn新相组织。该研究有助于提高对铝合金的冶金反应认知,为后续的性能分析奠定一定的理论基础。The addition of rare elements can effectively activate the hypoeutectic structure of Al-Si series.Al-Si-Cu-xSn aluminum alloy was prepared by medium frequency induction casting,and the effect of Sn content on the microstructure evolution of aluminum alloy was analyzed by experimental means.The results show that there are a large number of disordered dendritic structures in the aluminum alloy matrix,forming stable grain size.When w(Sn)is 0.8%,the secondary dendrite spacing decreases to 5.86μm.When the w(Sn)reaches 0.8%,there is almost no large-size eutectic silicon in the aluminum alloy,which mainly contains many small layers,and the edges become more passivated.In addition toα(Al)and Si phases,a new phase structure of Al2SiSn was formed in the alloy.This study is helpful to improve the understanding of the metallurgical reaction of aluminum alloy and lay a theoretical foundation for the subsequent performance analysis.

关 键 词：Al-Si-Cu铝合金 稀土Sn 微观组织 细化机理 

分 类 号：TG146.21[一般工业技术—材料科学与工程]