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ID:33683081
大小:2.37 MB
页数:63页
时间:2019-02-28
《mgcu复合丝材的挤压拉拔工艺及性能研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、国内图书分类号:TF124学校代码:10213国际图书分类号:621.7密级:公开工学硕士学位论文Mg/Cu复合丝材的挤压拉拔工艺及性能研究硕士研究生:KyaloMathewNdeto导师:刘祖岩教授申请学位:工学硕士学科、专业:材料加工工程所在单位:材料科学与工程学院答辩日期:2013年7月授予学位单位:哈尔滨工业大学ClassifiedIndex:TF124U.D.C:621.7DissertationfortheMasterDegreeinEngineeringRESEARCHONPROCESSINGANDPROPERTIESOFMg/CuCLADBIMETALWIRE
2、SOBTAINEDTHROUGHCO-EXTRUSIONANDDRAWINGCandidate:KyaloMathewNdetoSupervisor:Prof.Prof.LiuZuyanAcademicDegreeAppliedfor:MasterofEngineeringSpeciality:MaterialProcessingEngineeringAffiliation:SchoolofMaterialsScienceandEngineering.DateofDefence:July,2013Degree-Conferring-Institution:HarbinInst
3、ituteofTechnologyAbstractAbstractBimetallicwirescombinethepropertiesoftwodifferentmetalsintoahybridmaterialtoobtainimprovedperformancesuchascorrosionresistance,mechanicalstrength,andelectricalconductanceorenhanceweighttostrengthratio.Bycarefulmaterialselection,propertiesofbimetallicmaterial
4、scanbeoptimizedforparticularserviceconditions.However,difficultiesinmanufacturelimitthenumberofmaterialcombinationsinactualuse.Oneofthemainaspectsinproductionofcladwiresistoensureuniformityinsleevethickness.Co-extrusionisaprocessofconcurrentlyextrudingtwoormorematerialsfromasinglecompositeb
5、illet.Magnesiumexhibithighstrengthtoweightratio,goodthermalconductivity,highdimensionalstability,goodelectromagneticshieldingcharacteristics,highdampingproperties,goodmachinabilityanditiseasilyrecyclable.Magnesiumhasalsounattractivepropertieslikelowcorrosionandwearresistance,poorcreepresist
6、anceandhighchemicalreactivitythathavelimiteditswidespreaduseinmanyapplications.Copperontheotherhandpossessoutstandingresistancetocorrosion,exceptionalformability,andgoodstrengthandfatigueresistance.Coppercanbeusedinrelativelyhightemperatureapplications.Theabovementionedpropertiesofmagnesium
7、andcoppercanbeblendtogethertoobtainabimetalproducthavingsuperiorproperties.Inthisresearchaprocessingmethodcombiningextrusionanddrawingwascarriedouttoproducebi-metalwiresconsistingofamagnesiumcorecladbyacoppersleeve.Theinitialstepwasco-extrusioncarriedout
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