高強(qiáng)高導(dǎo)電Cu-Cr-Zr合金的組織與性能研究.pdf

1、中南大學(xué)碩士學(xué)位論文高強(qiáng)高導(dǎo)電CuCrZr合金的組織與性能研究姓名：陳小波申請學(xué)位級別：碩士專業(yè)：材料物理與化學(xué)指導(dǎo)教師：姜鋒20081201Abstract‘I’helnfluenceofworkingmethodsandheattreatmentconditiononthestrength，electricalconductivityandmicrostructureofCuCrZralloywasinvestigatedbyhar

2、dnesstest，tensile，electricalresistancetest，opticalmicroscopyXRD，SEM，andTEMMeanwhile，themechanismoftheinfluencewasdiscussedTheresultsshowthat：(1)Cu—CrZralloycangethighstrengthbysolution—agingtreatmentnestrengthofthealloya

3、chievethepeakafteragedin490。Cfor240minutes：TheBrinellHardness，electricalconductivitytensilestrengthandYieldStrengthwere108HB，900％IACS，423MPa，354MParespectively(2)Solutioncold—drawingaging(Thermomechanicaltreatment)caninc

4、reasestrengthofthealloysignificantlyThebesthomogenizationtreatmentofCu—CrZralloyisagingat450。Cfor240minby70％cold—rollingaftersolution980for60minTheBrinellHardnesselectricalconductivitytensilestrengthandYieldStrengthis153

5、HB，85I％IACS，529MPa，489MParespectively(3)Solutionagingcold—drawingcanincreasealloys’strengthgreatlyElectricalconductivitycanreachahighlevelbyannealingaftersolution—aging—cold—drawingAnnealingat510℃for60min，theBrinellHardn

6、esselectricalconductivitytensilestrengthandYieldStrengthis141HB，866％IACS，519MPa，475MParespectively(4)Thefineprecipitates，formedinthedecompositionofthesupersaturatedsolidsolution，resultindistinctincreaseinthepropertiesoft

7、healloyTwokindsofparticlesareobservedafterdifferentagingtreatments：coarseCrparticlesanddispersionprecipitateparticlesDispersionprecipitateparticlesappeartobecoherentTheprecipitateparticlesarefineandsmallamountagedunderlo

8、wertemperatureAsthetemperaturerising，theprecipitationsarecoarsesignificantlyandlostcoherentrelationship(4)Thehighstrengthandhighconductivityofalloycanbeexplainedbycoherentstrengtheningmechanismandmodelofconductiveunitbod