Mn和B对Al-Si合金中Fe相组织的影响  

Effect of Mn and B on the Microstructure of Fe Phase in Al-Si Alloy

作　　者：王家伟 席赟 王连超[1] 李亨[1,2] 陈星 WANG Jiawei;XI Yun;WANG Lianchao;LI Heng;CHEN Xing(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Industry and Equipment Technology Research Institute,Hefei University of Technology,Hefei 230009,China;Engineering Training Center,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]合肥工业大学工业与装备技术研究院,安徽合肥230009 [3]合肥工业大学工程训练中心,安徽合肥230009

出　　处：《安徽工程大学学报》2024年第4期43-51,共9页Journal of Anhui Polytechnic University

基　　金：中央高校基本科研业务经费项目(JZ2021HGTB0100);安徽省发改委创新工程项目(JZ2022AFKJ0032)。

摘　　要：研究Mn、B以中间合金形式加入铝液中对Al-Si合金中Fe相组织的影响。此次研究中,在熔体中加入0.625~2.5 wt.%的Mn和1~3 wt.%的Al-8%B中间合金进行保温沉降,因此合金的底部形成了块状α-Al(FeMn)Si相和AlB_(2)相沉淀,从而达到除铁的目的。Mn有利于块状富Fe相粒径的增大,加速沉降;AlB_(2)相会促进Mn在固液界面前沿析出,有利于富Fe相的形成。在温度为630~640℃时,具有较大的过冷度,铝液黏度较低,更有利于富Fe相的沉降。当Mn/Fe为2,Al-8%B的添加量为2 wt.%时为最佳合金设计。在630℃时铁含量降至0.5 wt.%,除铁率为60%,且保持较低的Mn含量。The effect of Mn and B added as intermediate alloys in molten aluminum,on the microstructure of Fe-rich phase in Al-Si alloys was studied.0.625~2.5 wt.%Mn and 1~3 wt.%Al-8%B alloy were added for thermal insulation settlement,forming a block shape at the bottom of the alloy α-Al(FeMn)Si phase and AlB_(2) phase precipitate.Mn is beneficial for increasing the particle size of massive Fe-rich phase and accelerating sedimentation;AlB_(2) phase will promote the precipitation of Mn at the front of the solid-liquid interface,which is conducive to the formation of Fe-rich phase.When the temperature is 630~640℃,it has a greater degree of supercooling and a higher viscosity of aluminum liquid,which is more conducive to the sedimentation of Fe-rich phase.The optimum alloy design was achieved when Mn/Fe was 2 and Al-8%B was added at 2wt.%.The Fe content is reduced to 0.5 wt.% at 630℃,with 60%Fe removal,and a low Mn content is maintained.

关 键 词：Mn/Fe α-Al(FeMn)Si相 保温温度 AlB_(2) 

分 类 号：TG146.2[一般工业技术—材料科学与工程]