马映璇,贾淑果,张朝民,宋克兴,周延军,肖振朋,岳鹏飞,郭慧稳

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属材料科学与加工技术重点实验室河南
• 3:河南省科学院
• 4:河南省先进导体材料重点实验室

摘要(Abstract)：

对冷轧态Cu-Cr和Cu-Cr-Sc合金进行时效处理，使用透射电镜、扫描电镜、光学显微镜、显微硬度计和涡流金属导电仪等研究了不同时效温度和时间对合金显微硬度、抗拉强度和导电率的影响。结果表明：480℃时效1 h后，Cu-Cr-Sc合金的综合性能较佳，其显微硬度达到161 HV0.1,导电率达到81.9%IACS,抗拉强度达到491 MPa;相较于480℃时效1 h的Cu-Cr合金，显微硬度提升了24.8%,抗拉强度提升了35.3%,导电率下降了12.9%,表明添加Sc可以显著提升Cu-Cr合金的力学性能，但是会略微降低导电率。微观组织分析表明Cu-Cr-Sc合金峰值时效后析出了Cr相，主要形貌为咖啡豆状和球状，析出相均为面心立方结构，与基体保持良好的共格关系。

关键词(KeyWords)： Cu-Cr-Sc合金;时效;析出强化;Cr析出相

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52071133,52173297);; 中原学者工作站资助项目(214400510028);; 河南省高等学校重点科研项目(23A430028)

作者(Author): 马映璇,贾淑果,张朝民,宋克兴,周延军,肖振朋,岳鹏飞,郭慧稳

DOI: 10.13289/j.issn.1009-6264.2022-0607

参考文献(References)：

• [1] Yang Y,Kuang G,Li R.Optimizing the electrical and mechanical properties of Cu-Cr alloys by Hf microalloying[J].Metals,2022,485(12):1-10.
• [2] Wang Y,Qu J,Wang X,et al.Effects of Y addition on the microstructure,properties and softening resistance of Cu-Cr alloy[J].Journal of Alloys and Compounds,2022,902:163816.
• [3] 雷前，杨一海，肖柱，等.高强高导高耐热铜合金的研究进展与展望[J].材料导报，2021,35(15):15153-15161.LEI Qian,YANG Yi-hai,XIAO Zhu,et al.Research progress and prospect on high strength,high conductivity,and high heat resistance copper alloys[J].Materials Reports,2021,35(15):15153-15161.
• [4] Fang H,Liu P,Chen X H,et al.Effect of Ti addition on the microstructure and properties of Cu-Cr alloy[J].Materials Science and Technology,2021,37(6):671-681.
• [5] Li J,Ding H,Li B,et al.Effect of Cr and Sn additions on microstructure,mechanical-electrical properties and softening resistance of Cu-Cr-Sn alloy[J].Materials Science and Engineering A,2021,802(1):140628.
• [6] 代雪琴，贾淑果，范俊玲，等.高强高导铜合金的强化机理与研究热点[J].材料热处理学报，2021,42(10):18-26.DAI Xue-qin,JIA Shu-guo,FAN Jun-ling,et al.Strengthening mechanism and research focus of high strength and high conductivity copper alloy[J].Transactions of Materials and Heat Treatment,2021,42(10):18-26.
• [7] 朱锐，张峻魁，石锋，等.稀土元素在铜中的作用机理研究进展[J].材料热处理学报，2022,43(7):1-8.ZHU Rui,ZHANG Jun-kui,SHI Feng,et al.Research progress on functional mechanisms of rare earth elements in copper[J].Transactions of Materials and Heat Treatment,2022,43(7):1-8.
• [8] 张毅，许倩倩，李瑞卿，等.稀土Ce对Cu-Cr-Zr合金高温变形行为的影响[J].材料热处理学报，2014,35(8):1-6.ZHANG Yi,XU Qian-qian,LI Rui-qing,et al.Effects of Ce on high temperature deformation behavior of Cu-Cr-Zr alloy[J].Transactions of Materials and Heat Treatment,2014,35(8):1-6.
• [9] 李周，宋克兴.“铜及铜合金专题”内容简介[J].中国有色金属学报，2021,31(5):1423-1426.LI Zhou,SONG Ke-xing.Brief introduction of “Special topic of copper and copper alloy”[J].The Chinese Journal of Nonferrous Metals,2021,31(5):1423-1426.
• [10] Na W,Li C,Du Z,et al.The thermodynamic re-assessment of the Cu-Zr system[J].Calphad-computer Coupling of Phase Diagrams and Thermochemistry,2006,30(4):461-469.
• [11] Bo H,Liu L B,Jin Z P.Thermodynamic analysis of Al-Sc,Cu-Sc and Al-Cu-Sc system[J].Journal of Alloys and Compounds,2010,490(1/2):318-325.
• [12] Zhao Z,Li Z,Lv L.Quantum chemical calculations of thermodynamic and mechanical properties of the intermetallic phases in copper-scandium alloy[J].Journal of Theoretical and Computational Chemistry,2017,16:1750056.
• [13] Franczak K,Kwaniewski P,Kiesiewicz G,et al.Research of mechanical and electrical properties of Cu-Sc and Cu-Zr alloys[J].Archives of Civil and Mechanical Engineering,2020,20(1):20-28.
• [14] Hao Z,Xie G,Liu X,et al.The precipitation behaviours and strengthening mechanism of a Cu-0.4 wt%Sc alloy[J].Journal of Materials Science and Technology,2022,98:1-13.
• [15] 张乐清.微量Hf对Cu及Cu-0.6Cr合金性能和组织的影响研究[D].赣州：江西理工大学，2019.ZHANG Le-qing.Effect of trace Hf on properties and microstructure of Cu and Cu-0.6Cr alloy[D].Ganzhou:Jiangxi University of Science and Technology,2019.
• [16] 张泽辉.Cu-Cr-Fe-Ni合金组织与性能的研究[D].赣州：江西理工大学，2020.ZHANG Ze-hui.Study microstructure and properties of Cu-Cr-Fe-Ni alloy[D].Ganzhou:Jiangxi University of Science and Technology,2020.
• [17] 徐晓岑，李家智，丁桦，等.组合形变热处理工艺对Cu-Cr-Zr-Si 合金组织性能及抗软化特性的影响[J].材料热处理学报，2021,42(7):57-64.XU Xiao-cen,LI Jia-zhi,DING Hua,et al.Effect of combined thermo-mechanical treatment on microstructure,properties and softening resistance of Cu-Cr-Zr-Si alloy[J].Transactions of Materials and Heat Treatment,2021,42(7):57-64.
• [18] Peng L,Xie H,Huang G,et al.The phase transformation and strengthening of a Cu-0.71 wt%Cr alloy[J].Journal of Alloys and Compounds,2017,708:1096-1102.
• [19] 宋鲁男.冷变形和时效对 Cu-Cr 合金显微组织与性能的影响[D].杭州：浙江大学，2013.SONG Lu-nan.Effect of cold deformation and aging on microstructure and properties of Cu-Cr alloy[D].Hangzhou:Zhejiang University,2013.
• [20] Du Y B,Zhou Y J,Song K X,et al.Zr-containing precipitate evolution and its effect on the mechanical properties of Cu-Cr-Zr alloys[J].Journal of Materials Research and Technology,2021(14):1451-1458.
• [21] Chbihi A,Sauvage X,Blavette D.Atomic scale investigation of Cr precipitation in copper[J].Acta Materialia,2012,60(11):4575-4585.
• [22] Ma M,Li Z,Xiao Z,et al.Microstructure and properties of a novel Cu-Cr-Yb alloy with high strength,high electrical conductivity and good softening resistance[J].Materials Science and Engineering A,2020,795:140001.
• [23] Peng H,Xie W,Chen H,et al.Effect of micro-alloying element Ti on mechanical properties of Cu-Cr alloy[J].Journal of Alloys and Compounds,2021,852:157004.
• [24] 龚清华，刘健，陈辉明，等.Co对Cu-Cr合金组织和性能的影响[J].金属热处理，2022,47(10):94-98.GONG Qing-hua,LIU Jian,CHEN Hui-ming,et al.Effect of Co on microstructure and properties of Cu-Cr alloy[J].Heat Treatment of Metals,2022,47(10):94-98.
• [25] 代雪琴，贾淑果，范俊玲，等.时效对 Cu-0.2Cr-0.08Ti 合金组织及性能的影响[J].材料热处理学报，2022,43(10):34-40.DAI Xue-qin,JIA Shu-guo,FAN Jun-ling,et al.Effect of aging on microstructure and properties of Cu-0.2Cr-0.08Ti alloy[J].Transactions of Materials and Heat Treatment,2022,43(10):34-40.

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