42湖南有色金属第28卷

强度开始下降明显。比较不同厚度带材在相同时效工艺下的强化效果可以看出,加工率居中的0115mm厚的带材强化效果最好,加工率最大的011mm厚的带材的强化效果最差。所以,选择合适的加工

率对强化效果影响也非常明显。

热轧和冷轧制备的带材经合适的热处理工艺可以获得高强高导的性能。

21C70250铜合金最佳时效温度为390~410e,保温1~2h,可获最佳的强化效果。参考文献:

[1] 范莉,刘平,贾淑果,等1高强度Cu-Ni-Si系引线框架材料研

究进展[J]1热加工工艺,2008,37(20):104-1071

[2] 陈兴章1集成电路铜合金引线框架材料的应用及产业化[J]1

上海有色金属,2002,23(4):146-1481

[3] 刘瑞清,王晓娟,蔡薇1铜合金引线框架材料的研究现状与发

展[J]1江西冶金,2003,23(6):81-831

[4] SuzukiS,ShibutaniN,MimuraK,etal1Improvementinstrength

andelectricalconductivityofCu-Ni-Sialloysbyagingandcoldrolling[J]1J1AlloysComp1,2006,417:116-1171

图4 时效处理时间对带材抗拉强度的影响

[5] FujiwaraH1EffectofalloycompositiononprecipitationbehaviorinCu-N-iSialloys[J]1JapanInst1Metals,1998,62(4):301-3021

[6] 谢水生,李彦利,朱琳1电子工业用引线框架铜合金及组织研

究[J]1稀有金属,2003,27(6):768-7761

3 结 论

11C70250铜合金带材采用中频感应电炉熔炼、

收稿日期:2011-11-06

TheDevelopmentofStripofC70250CopperAlloyLINa1,LIYong-lin2,ZHUBao-hui2,RenL-iping2

(11NorthwestRareMaterialsResearchInstitute,Shizuishan753000,China;21NingxiaOrientTantalumIndustryCo1Ltd,Shizuishan753000,China)

Abstract:Thispaperstudiesthepreparationandinfluenceofheattreatmentonthestructureandpropertiesof

C70250copperalloyofhighstrengthCu-N-iSialloy1Theresultsshow:theC70250alloyhasgoodsolutiontreat-mentsofteneffectandgoodagingtreatmenttoenhancestrength;thebestagingtemperatureofthealloyis390~410e,keepingthistemperaturefor1~2hours,thealloycangettothebeststength;theRmattain72818MPa;theconductelectricityratecanattain36137%1Theconductelectricityratereduceswiththestrengthincreasing,butitcangetthebestmatchofstrengthandconductelectricitybyadjustingtheagingtreatmentprocess1Keywords:C70250;copperalloy;strip