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ID:32991113
大小:7.37 MB
页数:87页
时间:2019-02-18
《6061合金半固态触变模锻成形工艺分析》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hbstractResearchonThixo--forgingProcessofSemi--solid6061AlloyAbstractBythetrendofautomotivelightweight,castingaluminumwheelshavebeenpopularizedintheautoindus仃ywithitscharacteristicsofrelativelylowprice,goodperformance,beautifulappearanceandSOon.Butforging
2、aluminumwheelswithcomplexproductionprocessandhighcostareusedinspecialareassuchassportsear,ascastingonesCannolongermeettheperformancerequirements.Semi—solidforgingisanearnetshapetechnology,andtheformingpartswiththistechnologyhavecloseperformancebutlowercosttofo哂ngon
3、esandmoreeffectivethancastingonesinlightweight,SOithasanimportantmeaningtoapplythistechnologyintheproductionofautomobilewheels.Semi-solidformingtechnology,FEM,6061alloyhavebeenintroducedinthispaper,andtheadvantagesandprospectsoftheapplicationofthixo··forgingwithsem
4、i··solid6061alloyintheproductionofautomobilewheelshavebeendescribed.Intheexperimentalparts,thestructurecharacteristicsofthesemi—solid6061alloybilletWasstudiedpreparedbyelectromagneticsemi—continuouscastingtechnologywithrawmaterialofpurealuminumetc.,andreheatingexpe
5、rimentswerealsocarriedouttostudythemicrostructureevolutionandtodefinetheoptimumreheatingprocess;usingDEFORM-3DFEMsimulationplatform,thecharacteristicsandvariationofmetalflow,temperaturefield,strainfield,stressfieldanddieloadwerestudiedtogetoptimumformingprocess;Fin
6、ally,theinfluenceofsolutiontemperature,solutiontime,agingtemperatureandagingtimeonmicrostructureandperformanceofformingpartswerestudiedtodefinetheoptimalheattreatmentprocess,andaverificationexperimentconducted.Theresultsareasfollows:(1)Semi—solid6061alloyingotwithg
7、oodsurfacequality,uniformandroselikegrainsCanbeobtainedbyelectromagneticsemi-·continuouscasting;theequal··area--circlegraindiametersofrim,middleandcenterpartare64.0gm,84.1gmand80.5gm,andtheminimumroundnessreached1.5:thesolidusandliquidusofobtainedalloyare580.34℃and
8、658.70℃,andwith53.08%liquidfractionat650℃;(2)ThequenchingstructurechangedsignificantlyandbecameuniformequiaxedgrainsV东北大学硕士学位论文Abstractbyreheatin
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