冷變形及熱處理對Cu-12%Fe合金組織與性能的影響.pdf

1、浙江大學材料科學與工程學系碩士學位論文冷變形及熱處理對Cu12%Fe合金組織與性能的影響姓名：陳翼申請學位級別：碩士專業(yè)：材料加工工程指導教師：孟亮20100101浙江人學碩上學位論文AbstractAbstractCu12％Fefilamentarycompositeswerepreparedbycasting，priorheattreatingandcolddrawingThemicrostructureevolutionofthe

2、alloysduringcolddrawingandtherelationshipbetweenmicrostructureandpropertieswereinvestigatedTheeffectsofpriorheattreatments，intermediateheattreatments，finalheattreatmentsandrareearthelementsonthemicrostructureandpropertie

3、sofCu12％Fecompositesduringdrawingdefonnation、VerediscussedCoarseprimaryFedendritesandsecondaryFeparticlesexistintheCumatrixintheascastCu12％FealloyQuenchingandagingtreatmentorhomogenizingtreatmentpriortodrawingdeformation

4、refinetheprimarydendrites，removethesolutesegregationalongCugrainboundariesandpromotetheprecipitationofsecondaryFeparticlesDuringcolddrawing，afilamentarystructuredispersedinCumatrixisformedfromtheprimaryFephaseThefilament

5、salignparalleltothewireaxisonthelongitudinalsectionandtheFephasehasacurledandfoldedmorphologyonthetransversesectionTherearedifferentpreferredorientationsformedindrawingstrainintheaxialandradialdirectionsinCuandFefilament

6、sThemicrostructurescalesofFefilamentsexponentiallydecreasewiththeincreaseindrawratioThedensityoftheinterfacebetweenCuandFephasesexponentiallyincreaseswiththeincreaseinaspectratioofFefilamentsWiththeincreaseindrawratio，th

7、estrainofFegrainslinearlyincreasesatthedrawratioslowerthan60anddeviatesfromthelinearrelationatthosehigherthan60ForCu12％FealloythestrengthandhardnessincreaseandelectricalconductivitydecreaseswiththeincreaseindrawratioTher

8、eisaHallPetchrelationshipbetweenthestrengthorhardnessandFefilamentspacingThedecreaseofconductivityismainlyattributedtotheincreaseofinterfacescatteringPriorheattreatmentsandintermediateheattreatmentsfacilitatethedeformati

9、onofFedendritesandpromotetheprecipitationofFe，whichremarkablyimprovesthestrengthlevelsandelectricalpropertiesduringthedeformationprocessHoweverthedecreaseofconductivityofCu一12％Fewithintermediateheattreatmentshasahighrati