正文描述:《高弹高导cu-ni-sn合金组织与性能分析》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、西安理工大学硕士学位论文thendecreases,whiletheelectricalconductivityofalloysmaintainsagrowthtrendasextendedagingtime.Nicanshortenalloyhardeningpeakagingtimeandenhancethehardeningeffect.ThepeakhardnessofCu-5Ni-5SnandCu-7.5Ni-5Snalloyis253.67HVand274HV,respectively,andthepeakconductivityis15.22%IACSand14.74%IA
2、CS.(4)Colddeformation(0%,17%,35%)andagingtreatmentofCu-7.5Ni-5Snalloyhavebeenstudiedanddrawconclusion:Colddeformationcanshortenalloyhardeningpeakagingtimeandtoenhancethehardeningeffect.Thegreaterthecolddeformationis,thehigherthepeakelectricalconductivityofalloy.(5)Aftersolidsolutionandagingtreatm
3、ent,thehardnessandelectricalconductivityofCu-7.5Ni-5Sn-xV(x=0,0.2,0.5)significantlyincreased.Withprolongingagingtime,thehardnessincreasesandthendecreases,whiletheelectricalconductivityofalloysmaintainsagrowthtrendasextendedagingtime.AddVintoCu-7.5Ni-5Snalloycanextendalloyhardeningpeakagingtime,wh
4、iletoenhancethehardeningeffect.TheelasticmodulusofCu-7.5Ni-5Sn-xV(x=0,0.2,0.5)alloyis155.93GPa,155.96GPaand158.25GPa.(6)ThehardnessandelectricalconductivityofCu-7.5Ni-5SnandCu-7.5Ni-5Sn-0.5Vareverylow,thisisduetolowtemperature(300℃)dissolutionofthesoluteatomsareverysluggish.Thediscontinuousprecip
5、itationofγ-DO3((CuxNi1-x)Sn)immediatelyoccursduringagingtreatmentattemperatureof450℃and520℃,andthisisbadforalloyperformanceduetoitisincoherentwithmatrix.Keywords:Cu-Ni-Snalloy;V;Microstructure;electricalconductivity;hardness;colddeformationAcknowledgment:ThisresearchwassupportedbytheNationalNatur
6、alScienceFoundationofChina(No.51171147)andScientificResearchProgramFundedbyShaanxiProvincialEducationDepartment(No.2010JK763).IV万方数据目录目录1前言...........................................................................................................................................11.1课题研究背景.........
7、........................................................................................................11.2高弹性铜合金的种类和特性.........................................................................................11.2.1铍青铜
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