2023年第5期2023年10月·试验研究·固液浇注法铸铝/镁铸锭复合材料界面层研究铸造设备与工艺FOUNDRYEQUIPMENTANDTECHNOLOGYD0I:10.16666/j.cnki.issn1004-6178.2023.05.007Oct.2023No5陈东,叶丹,刘琛,刘正旺,尹正宇,郑心喆,朱永长（佳木斯大学材料科学与工程学院，黑龙江佳木斯154000）摘要：针对单一镁合金（AZ91D）耐热性差和耐腐蚀性差的问题，利用固液复合的方法将熔融铝液（纯铝）倒入镁合金中（AZ91D）制备Mg/AI合金双金属复合材料。通过扫描电镜（SEM）、能谱仪（EDS）X射线衍射(XRD)以及拉伸测试对材料界面组织、相组成和硬度测试进行分析。试验结果表明：当以熔融纯铝为浇注金属时，浇注温度为730C，空冷、镁合金（AZ91D)和铝锭未获得较明显的界面组织，猜测可能是出现了扩散连接。其中共有3个合金界面较明显的区域，其中中间界面区域为AlsMg2和残存的MgSiz,Mg基体一侧主要为Mg基固溶体和极少量的MgiAliz,Al基体一侧主要为Al基固溶体和Al,Mg2.关键词：固液复合；双金属复合；复合材料中图分类号：TG146,TG292StudyonInterfaceLayerofAVAZ91DLaminatedCompositeBasedonSolid-liquidCompositeCHENDong,YEDan,LIUChen,LIUZheng-wang,YINZheng-yu,ZHENGXin-zhe,ZHUYong-chang(SchoolofMaterialsScienceandEngineering,JiamusiUniversity,JiamusiHeilongjiang154007,China)Abstract:Aimingattheproblemofpoorheatresistanceandcorrosionresistanceofasinglemagnesiumalloy(AZ91D),Mg/Alalloybimetalliccompositewaspreparedbypouringmoltenaluminumliquid(purealuminum)intothemagnesiumalloy(AZ91D)bysolid-liquidcompositemethod.Theinterfacialmicrostructure,phasecompositionandhardnessofthematerialswereanalyzedbyscan-ningelectronmicroscopy(SEM),energydispersivespectroscopy(EDS),X-raydifraction(XRD)andtensiletest.ThetestresultsThetestresultsshowthatnoobviousinterfacialstructurecanbeobtainedwhenpurealuminumispouredat730Candcombinedwithmagnesiumalloybyaircooling.Thepossiblereasonisthatthereisdiffusionconnectionintheinterface.Therearethreeregionswithobviousalloyinterface,amongwhichthemiddleinterfaceregionisAl,Mg2andresidualMgSi2,theMgmatrixsideismainlycomposedofMg-basedsolidsolutionandasmallamountofMgizAli2,andtheAlmatrixsideismainlycomposedofAl-basedsolidsolutionandAl.Mg2.Keywords:s...
