流變鑄造造銅電機轉(zhuǎn)子的材料設計及制漿.pdf

1、學位論文獨創(chuàng)性聲明本人聲明所呈交的學位論文是本人在導師指導下進行的研究工作及取得的研究成果。據(jù)我所知，除了文中特別加以標注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得直昌太堂或其他教育機構(gòu)的學位或證書而使用過的材料。與我一同工作的同志對本研究所做的任何貢獻均已在論文中作了明確的說明并表示謝意。學位論文作者簽名(手寫)撕簽字日期：彬年j碉引日學位論文版權(quán)使用授權(quán)書本學位論文作者完全了解直昌太堂有關保留、使用

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3、授權(quán)書)學位論文作者簽名(手寫)孫≯簽字日期：珈弓年多月糾日ABSTRACTABSTRACTCu—CaalloysincludingdifferentCacontentsaremeRedandpouredsuccessfullyinthissubjectTheeffectofdifferentCacontentsonthemicrostructureandpropertiesisalsoanalyzedinthispaperTheres

4、earchresultsareasfollowing：CuCaalloysincludingCu019％CaCu056％CaCu069％CaCu087％CaandCu一131％CaaremeltedandpouredsuccessfullyintheZG0025VacuumMediumFrequencyInductionFurnaceinwhichalltheairispumpedoutandthen80MPaargongasisfil

5、ledThemicrostructureofthealloysisonlycomposedofa—Cuphaseand13CusCaphaseWithCacontentincreasing，eutecticstructureincreasescontinuouslyandprimaryCugrainsarerefinedTheincreasingCusCacontentmakesthealloysconductivitydecrease

6、andmicro—hardnessenhanceconstantlyWhentheCacontentofthealloyismorethanO22％thealloyconductivitywillbelessthan85％IACSSemisolidCu—CaalloysslurryincludingCu073％Ca，Cu一095％Ca，Cu一121％Ca，Cu161％CaCu214％Caarepreparedsuccessfullyby

7、LSPSFwhichisdesignedanddevelopedbyOUrteamselfTheeffectofdifferentCacontentsontheshapeandsizeandmicrohardnessofthegrainisanalyzedinsemisolidCuCaalloysslurryorganizationTheexperimentandanalysisresultsshowthattheaverageequi

8、valentdiameterofthegrainsdecreaseandtheshapefactorsincreasewiththeincreasingofCacontentMicro—hardnesshasincreasetrendwhollywitllCacontentincreasingContrasttothemicrostructureandmechanicalpropertiesofthecastingandsemisoli

9、dCuCaalloys，theanalysisresultsCanbeconcludedasthefollowing：thegrainofthecastingalloyisdendritewhilethegrainofthesemi—solidalloyisrosiness，hemisphericorballshape；thegrainsizeofsemisolidalloyissignificantlybiggerthanthecas