A high speed twin roll caster for aluminum alloy strip

《A high speed twin roll caster for aluminum alloy strip》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、JournalofMaterialsProcessingTechnology1132001)291±295Ahighspeedtwinrollcasterforaluminumalloystripa,*bT.Haga,S.SuzukiaDepartmentofMechanicalEngineering,OsakaInstituteofTechnology,5-16-1Omiya,Asahi-ku,Osaka535-8585,JapanbInstituteforMetallicMaterials,TechnicalUniversityBerlin,Se

2、cr.PN2-3HardenbergStr.36,D-10623Berlin,GermanyAbstractAmeltdragtwinrollcasterMDTRC)wasdevisedinordertocastaluminumalloystripsataspeedhigherthan30m/min.A3003alloy,A5182alloy,Al±6mass%SialloyandAl±12mass%SialloywerecastintothinstripsusingtheMDTRC.Thesealloyscouldbecastintostripsa

3、taspeedofupto60m/min.Thethicknessofthestripswasabout1±3mm.TheMDTRCcouldcastthinnerstripsthantheconventionaltwinrollcasterforaluminumalloys.Lubricantwasnotusedtopreventthestickingofthestrip,asstickingdidnotoccurduetotheeffectofthecopperrollsandthelowseparatingforce.Themechanicalp

4、ropertiesandthemicrostructuresofthestripsthatwerecastusingtheMDTRC,wereinvestigatedinthepresentstudy.ItwasshownthatMDTRCwasusefulforthehighspeedrollcastingofaluminumalloystrips.#2001ElsevierScienceB.V.Allrightsreserved.Keywords:Twinrollcaster;Rollcasting;Stripcasting;Thinstrip;M

5、eltdragtwinrollcaster1.Introductionlowerrollisreferredtoasthesolidi®cationrollS-roll).Approximately80%ofthestripthicknessissolidi®edbytheAtwinrollcasterprovidesvariousadvantagesfortheS-roll.TheF-rollsolidi®esthesemi-solidlayerthatiscastingofaluminumalloystrips,includingthedirec

6、tfab-presentonthesolidlayerandthethinsolidi®cationlayerricationofthestripfrommelt,rapidsolidi®cation,lowfromthemelt.Thesemi-solidlayercanbeformedintoa¯atequipmentcostandsoon[1±4].However,somedisadvan-surfacebyapplyingasmallseparatingforce,becausethetages,suchaslowcastingspeed,st

7、ickingofthestriptothe¯owstressofthesemi-solidmetalissmallerthanthatoftheroll,andlimitationconcerningthetypesofaluminumalloyssolidmetal.TheF-rollissupportedbyspringsinordertothatcanbecast,areassociatedwiththetwinrollcasterpreventrollingundertheapplicationofalargeseparating[1±4].A

8、mongthesedisadvantages,thelowcastingspeedisforc