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1、分类号UDC密级学号1208050402Cu-Ti-Ni导电铜合金的组织硕士学位论文与性能研究Cu-Ti-Ni导电铜合金的组织与性能研究刘佳刘佳西安理学科名称：材料加工工程工大学学科门类：工学指导教师：王献辉教授申请日期：2015年4月万方数据万方数据万方数据西安理工大学硕士学位论文绕，且基体中的位错线向位错环转变。(8)深冷处理提高了Cu-3Ti-xNi(x=1,3,5)合金的硬度，但对导电率影响不大。在本实验范围内，Cu-3Ti-xNi(x=1,3,5)合金深冷处理的最佳工艺是在液氮中直浸15h，硬度分别是228HV、200HV和21
2、7HV。与深冷处理前相比,Cu-3Ti-xNi(x=1,3,5)合金的硬度分别增加了11.2%、9.3%和16.0%。关键词：Cu-Ti-Ni合金；时效处理；深冷处理；显微组织；硬度；导电率本研究得到国家自然科学基金(51274163)、陕西省重点实验室研究计划项目(13JS076)陕西省重点科技创新团队(2012KCT-25)、陕西省重点学科项目专项资金资助项目(2011HBSZS009)资助。Ⅱ万方数据万方数据西安理工大学硕士学位论文(5)Afteronestepagingandtwostepagingtreatment,theele
3、ctricalconductivityincreasessharplyandthenincreasesslowlyforCu-3Ti-xNi(x=1,3,5)alloys.Afteroveragingtreatment,theelectricalconductivityofCu-3Ti-1Nialloyincreasesslowly,theelectricalconductivityofCu-3Ti-3Nialloydecreasesslightly,whiletheelectricalconductivityofCu-3Ti-5Nial
4、loydecreasessharply.(6)ThepeakhardnessofagedCu-3Ti-1NialloyislargerthanthatofCu-3Ti-3NiandCu-3Ti-5Nialloys,buttheelectricalconductivityofCu-3Ti-1NialloyislessthanthatofCu-3Ti-3NiandCu-3Ti-5Nialloys.Afteroveragingtreatment,boththehardnessandelectricalconductivityofCu-3Ti-5
5、Nialloydecreasesharply.(7)CryogenictreatmentpromotesthegrainrefinementofCu-3Ti-xNi(x=1,3,5)alloys,andprecipitationoftinyparticlesphase,andmorecompleteprecipitationofNi3Tiphase.Inaddition,theintertwiningofdislocationspresentsaroundtheNi3Tiprecipitatedphaseandthedislocation
6、linestransformintodislocationloopintheCumatrix.(8)CryogenictreatmentcanincreasethehardnessofCu-3Ti-xNi(x=1,3,5)alloys,buthasamlostnoeffectontheelectricalconductivity.Intherangeofexperiments,theoptimumcryogenictreatmentprocessforCu-3Ti-xNi(x=1,3,5)alloysisimmersedatliquidn
7、itrogenfor15h,thehardnessnumberofCu-3Ti-xNi(x=1,3,5)alloysare228HV,200HVand217HV,respectively.Comparedwiththatbeforethecryogenictreatment,thehardnessnumberCu-3Ti-xNi(x=1,3,5)alloysaftercryogenictreatmentisincreasedby11.2%,9.3%and16.0%respectively.Keywords:Cu-Ti-Nialloy;ag
8、ingtreatment;cryogenictreatment;microstructure;hardness;electricalconductivityTheresearchwassupp
