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1、------------------------------------------------------------------------------------------------Mn对Al_Mg_Si_Cu铝合金结晶相的影响第14卷第11期Vol.14No.11中国有色金属学报TheChineseJournalofNonferrousMetals2004年11月Nov. 2004文章编号:10040609(2004)11190606①Mn对Al2Mg2Si2Cu铝合金结晶相的影响刘 宏1,2,刘艳华1,赵 刚1,刘春明1,
2、左 良1(1.东北大学材料与冶金学院,沈阳110004;2.山东轻工业学院机电工程学院,济南250100)摘 要:通过扫描电镜/能谱、X射线衍射以及金相分析,针对含0.3%Fe(质量分数)的Al2Mg2Si2Cu铝合金,研究了Mn含量对其结晶相的影响。研究表明:合金在铸造过程中形成的结晶相为Al1.9CuMg4.1Si3.3,Al5(FeMn)Si,Al8(FeMn)2Si以及少量的Mg2Si;增大含Mn量,合金中AlFeMnSi型结晶相数量增多;时,Al1.9CuMg4.1Si3.3相完全溶解,发生Al5(FeMn)Si向Al8(Fe
3、Mn)2后,结晶相碎化且沿轧向呈纤维状分布,但结晶相的类型不变关键词:Al2Mg2Si2Cu铝合金;结晶相;Al1.9CuMg4.1Si;Al82中图分类号:TG146.21:AEofAl2Mg2Si2CualloysLIUHong1,2,LIUYan2hua1,ZHAOGang1,LIUChun2ming1,ZUOLiang1——————————————————————————————————————--------------------------------------------------------------------
4、----------------------------(1.SchoolofMaterialsandMetallurgy,NortheasternUniversity,Shenyang110004,China;2.SchoolofMechanicalandElectricalEngineering,ShandongInstituteofLightIndustry,Jiπnan250100,China)Abstract:Bymeansofscanningelectronmicroscope/energyspectrum,X2raydif
5、fractionandmetallographicanalysis,theeffectofMncontentontheconstituentsofAl2Mg2Si2Cualuminiumalloyscontaining0.3%Fe(massfraction)wasstudied.TheresultsindicatethattheconstituentsformedduringcastofalloysareAl1.9CuMg4.1Si3.3,Al52(FeMn)Si,Al8(FeMn)2SiandalittleMg2Si.Withincr
6、ementofMncontent,thenumberoftheconstituentsofAl(FeMn)Siisin2creased.Duringhomogenizingtreatment,theAl1.9CuMg4.1Si3.3phasedissolvescompletely,andthephasetransformationofAl5(FeMn)SitoAl8(FeMn)2Sioccurs.Butthemorphologyanddistributionhavenotvariation.Afterrollingandfinalhea
7、ttreatment,theconstituentsarecrushedanddistributeincontinuouslinesalongrollingdirection.However,typesoftheconstituentsvarynolonger.Keywords:Al2Mg2Si2Cualuminiumalloys;constituents;Al1.9CuMg4.1Si3.3;Al5FeSi;Al8Fe2Si 工业Al2Mg2Si2Cu铝合金中常添加锰元素,目的是在铸锭均匀化处理过程中形成细小的(粒径约0.1μm)弥散
8、相粒子,以阻碍合金的再结晶,细化——————————————————————————————————————-------------------------------------------------
