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ID:33136781
大小:17.60 MB
页数:68页
时间:2019-02-21
《半固态6063铝合金再结晶组织演变的分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、东北大学硕士学位论文StudyonMicrostructuralEvolutionofSemi-·Solid6063AluminumAlloyinRecrystallizationAbstractSemisolidmetalprocesshasbeenpaidmuchattentionbecauseofitsfinecharacteristicssuchashighefficiency,hi曲performance,lowcost,energyconservationandenvironmentalprotectionetc.111e
2、SSMhadalargeimprovementontheoryresearchandindustrialapplicationinthepast40years.Inordertoachieveperfectsemisolidbilletmicrostructure,peoplehaveinventedmanytechniquestomakesemisolidbilletintherecentlyyears,however,asaresultofsolidificationlatentheatincastingprocess,peopl
3、ecouldnotachieveunifo吼i锣fineandspheroidalbilletmicrostructureasexpectation.MicrostructureandcapabilityofbilletwouldbeenhancedhighlybecauseofitsfmegrainsafterThermomechanicaltrealmentanditwouldreducethetechnicsdemandofmakesemisolidslurry.IntheaidoftheNationalNaturalScien
4、ceFoundationofChina,thispaperchoosedsemisolid6063alloyasexperimentalmaterial,studiedtheruleofthealloymicrostructureevolutioninrecrystallizationafterThermomechanicaltreatment.ThemainresultsachieyedareaSfollows:Themicrostructurecoldrolledto30%、40%、50%、60%、65%ofalloyWasstu
5、died,opticalmicrographsshowedthegrainsofbilletwerestavedaftercoldrolling,withthelagerdeformationdegree,thegrainsmicrostructurewouldbestavedmoreserious.Whencolddeformationdegreereached50%,thegrainsmicrostructureaftercoldrollingwouldlikeflakesandsomegrainsseemedlikecracke
6、drosebush,thesecrackedrosebushgrainsgottogtherlikeastrip,anditsareawouldbeincreased诵t11thelargerdeformationdegree.nemicrostructureannealedat520。Cand615"Cfordifferenttimeofalloyaftercoldrollingwithreduction65%wasstudied.opticalmicrographsshowedthegrainssizewouldbelargerw
7、iththelongerannealingtimewhenalloysampleswereannealedat520℃for5minutesto35minutes.Mlilethegrainssizewouldbesmallerwiththeshoterannealingtimewhenannealedat615℃forlminuteto5minutes.1f1圮microstructureannealedat520"Cto625。Cfor5minutesofalloyaftercoldrollingV东北大学硕士学位论文、衍tIlr
8、eduction65%wasstudied.opticalmicrographsshowedthegrainssizewouldbelargerwiththehigherannealingtemperature.Thes
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