电磁铸轧5052铝合金板材组织性能分析

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1、东北大学硕士学位论文abstractStudyonMicrostructureandPropertyof5052AluminumAlloySheetsbyElectromagneticRoll—-castingAbstract5052aluminumalloyisoneofthemostwidelyusedproductsinthe5xxxaluminumalloy．Thatiswidelyusedintheindustryofautomobile，machine，aerospace，shipping，electronicandSOon．Atprese

2、nt，5052aluminumalloysheetisonlyproducedbythemethodofcastingandrolling．Thathasdisadvantagesoflongprocessflow,bigequipmentinvestmentandhighproductioncost．Themosteconomicmethodofaluminumalloyiscontinuousroll—casting．Thathasadvantagesofenergyconservation，environmentalprotection，smal

3、linvestmentandlowproductioncost．Inthispaper,5052aluminumalloysheetswerefabricatedundertheconditionofelectromagneticfield．Thesolidificationfeatureofroll-castingzoneof5052aluminumalloywasanalyzed．Theeffectofstaticmagneticfieldandelectromagneticoscillationonmicrostructuresofroll—ca

4、stingzonewasresearched．Theeffectofstaticmagneticfieldandelectromagneticoscillationonmicrostructuresofsheetandmechanicalpropertieswasanalyzed．Aseriesofresultswereobtainedasfollows：(1)Staticmagneticfieldandoscillatingfieldrefinedthemicrostructuresofroll．castingzoneof5052aluminumal

5、loy．Graingrowthhadcertaindirectivityundertheconditionofstaticmagneticfield．Butgraingrowthhadnodirectivityundertheconditionofoscillatingfield．(2)Undertheconditionofstaticmagneticfield，edgeandcentermicrostructuresofroll—castingzonewererefined，butgrainsuneven．Obtainedunderthecondit

6、ionofelectromagneticoscillation，centermicrostructureswereequiaxedgrainandgrainswereinterruptedatthesideoftwo—phasezoneandinfomaedzonemeanwhilemanysmallgrains东北大学硕士学位论文abstractdistributedsurroundingthedendritegrains．(3)Staticmagneticfieldandoscillatingfieldrefinedthemicrostructur

7、esof5052aluminumalloysheet．Therefinementeffectofstaticmagneticfieldwasmorenoticeable，butgrainsuneven．Undertheelectromagneticoscillation，thesizeofgrainwasevenandgrainstendedtoequiaxedgrain．(4)5052aluminumalloysheetshadcentersegregationband．Underthestaticmagneticfield，centersegreg

8、ationbandnarrowedandsomeplacesappearedthreadlik