加工工藝對Mg-Sn-Zn合金組織性能的影響.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文加工工藝對MgSnZn合金組織性能的影響姓名：劉杰申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：蓋登宇20111017摘要AbstractWimtheadVantagesincluding10wdensity，hi曲specificstrengtll，specificrigidi夠，daI]【1pingpmcessabili夠，recyclabili夠andsoon，manystudiesarefocusedo

2、nmagnesiumalloysWithllightenlperaturecre印resistallcea11dlowprice，TheMgSnZnalloyapplicationaIlddevelopmentarehjnderedforitspoormechanicalpropeIrties111mispaper，metallo鏟apllic，XI①aIldSEM／EDStecllIliquesandmechaIlicalproper

3、t)，testingmemodswereusedTlleeffectofcontentsofSnaIldZnonmicros缸uctL玳andmechanicalpropertiesofMg—SnZnalloyofaScast，T4，T6，hotrolledstateswerestudiedTheeffectofdifferentheattreatment齜ldhotrollingprocessesont11em記rostructure

4、andmechaIlicalpropeIrtiesofMg一(5～6)吼％Sn(0～2)叭％ZnalloywerealsostudiedTheresultsshowed：Micros咖咖es仃u咖eofMgSnZnallOyinc2Lstingstatuewasmeden嘶teⅥ粗chcompositedof0【Mg，M92SnanddiVorCedeutecticWithZna11dSncontentincreaSing，dendri

5、tearmspacingdecreaseda11dmechaIlicaJpropertiesimpr0VedWhenmecontentofSnexcesses5％，microsmlctl呱echangesaIldmechanicalpropertiesdecreasesInT4仃eahnent，withs01utiontemperaturerisingandsolutiontimeprolonging，dendriteaIldM92Sn

6、phausegraduallydisappearedandthe觚ins印pearedZncannotoIllydecrease吐1emehingpointofmealloy，butalsoinllibittwinsgeneratinginT4trea缸：IlentInT6treatment，M＆SnphaSewasprecipitatedagainWimagingtempera_cllrerisingalldtimeprolongin

7、g，M92SnphaSeappe撕ngmoreaIldmoredispersionandmechanicalpropeniesoftllealloyimproVedWhenagingtimelongertllanacertajntime，mechallicalpropeniesdecreaSedforoveragingphenomenonARerT6treat】[Ilent，t謝nsstillexisted，TheM92Snnu瑚【be

8、rswerepromotedalldthet麗nsnumberweresuppressed訊thadditionofZnDynaIIlicrec巧stallizationwaus切kenplaceduringhotrollillgTherewerealotof嘶nsalldafewofsubstmcturesinmicrostmcnlreWimdefonnationaIldhotr01lingtempera_tureincreaSing

9、，dynaI】=licrecrystallizationwaSmoreandmorecompleteAdditionofSnaIldZnpromoteddyn鋤icrecryStallization，whjleimproVedtllemechaIlicalpropertiesoft11ealloysDuringthe缸eestatea110ys，alloy世errollinghadmehi曲eSttensiles仃engtll，bute