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时间:2020-04-30
《Cu-Cr-Zr-Mg-Ce合金微观组织及时效工艺.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、实用研究种铸造及有色合金2014年第34卷第1期CU—Cr-Zr-Mg—Ce合金微观组织及时效工艺摘要采用金相显微镜(0M)、扫描电镜(SEM)、透射电镜(TEM)及能谱分析仪(EDS)对Cu一0.4Cr_O.2Zr-0.15Mg一0.02Ce合金的铸态、固溶态及时效态的组织进行了观察和相分析。结果表明,铸态合金为枝晶组织;在960℃X2h固溶后合金析出了条状金属问化合物;再经6O%变形量的冷轧和480℃×8h时效,合金生成了Cr单质和CuZr相。同时研究了在480℃下不同的时效时间(2、5、8、11、14、17h)下电
2、导率和硬度。结果表明,在480℃×8h时效时硬度(HBW)达165,在480℃X1lh时效后电导率达到了46.98MS/m。关键词关键字:Cu—Cr-Zr-Mg-Ce;微观组织;时效;电导率;硬度中图分类号TG245;TG146.11文献标志码A文章编号1001—2249(2014)01—0016—04MicrostructuralofCu-Cr-Zr-Mg-CeAlloyandItsAgingTreatmentHouBin,LuLiangliang,kiuSong,DaiSihai,ChenXiaohua,WangZi
3、dong(1.SchoolofMaterialsScienceandEngineering,UniversityofScienceandTechnologyBeijing;2.StateKeyLaboratoryforAdvancedMetalsandMaterials,UniversityofScienceandTechnologyBeijing)Abstract:ThemicrostructureofCu一0.4Cr一0.2Zr一0.15Mg一0.02Cealloyatas—cast,solidsolutionsta
4、teandagingstatewasobservedusingopticalmicroscope(OM),scanningelectronicmicroscope(SEM)andtransmissionelectronmicroscope(TEM).Theprecipitationphaseofthealloypreparedwasanalyzedu—singenergydispersionspectrometer(EDS).Theresultsshowthatthemicrostructureofas—castCu一0
5、.4Cr一0.2Zr-0.15Mg一0.02Cealloyexhibitstypicaldendritestructure,andthestripprecipitatedphasewhichisintermetalliccompoundcontainedMgandZrcanbeobservedaftersolutiontreatmentat960℃for2h,andchromium—richphase(Cr)andzirconium—richphase(Cu4Zr)canbegeneratedafter60%cold—r
6、olleddeformationandagingat480℃for8h,meanwhile,Mg,Zr,Crcontentinthestripinterme—talliccompoundareincreasedobviously.Theconductivityandhardnessofthealloywithagingat480℃fordifferenttimesuchas2、5、8、11、14、17hwereanalyzed.Theresultsshowthattheelectricconductiv—ityandha
7、rdnessareincreasedquicklyatfirstandthentendedtostablestate,finallydecreasedwithin—creasingintheagingtime.Conductivityandhardnessreachthemaximumvaluesof165and46.98MS/m,respectively,at480℃×8handat480℃X11h,respectively.KeyWords:Cu-Cr-Zr-Mg-Ce,Microstructure,Aging,El
8、ectricalConductivity,Hardness高强度、高导电性铜合金广泛应用于大规模集成电MPa和45.7OMS/mE1。我国的高强、高导铜合金用量路的引线框架,高速电气化铁路的电车线(技术标准:抗居世界前例,但是大部分依赖进口,因此研发具有自主拉强度≥550MPa;电导率≥43.50MS/m)L1j,大
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