陈亚军,张佳伟,陈凯旋,周涛,陈晓华,潘鹏,王自东

• 1:北京科技大学材料科学与工程学院
• 2:五矿发展股份有限公司
• 3:瑞典皇家理工学院
• 4:北京科技大学新金属材料国家重点实验室

摘要(Abstract)：

利用真空感应熔炼-铸造工艺制备了微量铬强化的B10合金(即Cu-10Ni-0.3Cr (mass%)合金),并对铸态合金进行固溶、冷变形及退火处理,采用光学显微镜、拉伸测试和四线制测量法等研究了不同处理状态下Cu-10Ni-0.3Cr合金的显微组织、力学性能和电导率。结果表明,铸态Cu-10Ni-0.3Cr合金晶粒为等轴状,晶粒中均匀分布着黑色颗粒状析出相;再结晶退火后合金的组织均匀细小,晶粒内有明显的退火孪晶。铸态合金的导电性最好,电导率为17.15%IACS,900℃固溶2 h后合金的导电性最差,电导率为12.30%IACS。冷轧态(50%变形量)合金的强度、硬度最高,分别为340 MPa、112 HB,延塑性最差,伸长率只有8%;再结晶退火态合金综合力学性能最好;随着退火温度升高,冷轧态合金形变组织逐渐消失,且退火温度愈高,形变组织消失得愈明显,同时晶粒在退火过程中发生长大,最终导致合金强度、硬度降低,塑性增加。

关键词(KeyWords)： B10合金;固溶处理;冷轧退火;显微组织;性能

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费(FRF-TP-19-002A1);; “十三五”装备预研领域基金(61409220124)

作者(Author): 陈亚军,张佳伟,陈凯旋,周涛,陈晓华,潘鹏,王自东

DOI: 10.13289/j.issn.1009-6264.2019-0483

参考文献(References)：

• [1] 孙二举,陶欢,孙朋朋,等.B10合金管材焊接裂纹原因分析[J].热加工工艺,2019,48(9):256-258.SUN Er-ju,TAO Huan,SUN Peng-peng,et al.Reason analysis of welding crack of B10 alloy pipe[J].Hot Working Technology,2019,48(9):256-258.
• [2] 吴承建.金属材料学[M].北京:冶金工业出版社,2009.
• [3] Chen K X,Chen X H,Ding D,et al.Heterogeneous nucleation effect of in situ iron-rich nanoparticles on grain refinement of copper alloy[J].Materials Letters,2016,168:188-191.
• [4] Chen K X,Pan S W,Chen X H,et al.Optimisation of deformation properties in as-cast copper by microstructural engineering.Part II.Mechanical properties[J].Journal of Alloys and Compounds,2020,812:151910.
• [5] 齐晨.二元Cu-Ni合金固液界面性质的原子尺度模拟研究[D].上海:上海交通大学,2017.QI Chen.Atomic study of solid-liquid interfacial properties of the Cu-Ni binary system[D].Shanghai:Shanghai Jiao Tong University,2017.
• [6] 胡赓祥,蔡殉,戎咏华.材料科学基础[M].上海:上海交通大学出版社,2000:200.
• [7] 耿浩然,王守仁,王艳,等.铸造锌、铜合金[M].北京:化工工业出版社,2006:146.
• [8] 杨刚毅,汪冰峰,刘源,等.铸造铜合金冲刷腐蚀及机理研究[J].矿冶工程,2019,39(1):125-127.YANG Gang-yi,WANG Bing-feng,LIU Yuan,et al.Mechanism of erosion corrosion of as-cast copper alloys[J].Mining and Metallurgical Engineering,2019,39(1):125-127.
• [9] 夏爽,李慧,周邦新,等.金属材料中退火孪晶的控制及利用——晶界工程研究[J].自然杂志,2010,32(2):94-100.XIA Shuang,LI Hui,ZHOU Bang-xin,et al.Control and application of annealing twins in metallic materials:grain boundary engineering[J].Chinese Journal of Nature,2010,32(2):94-100.
• [10] 胡江桥.金属材料退火孪晶控制及应用[J].科技资讯,2013(23):4-6.HU Jiang-qiao.Control and application of annealing twins in metallic materials[J].Science and Technology Information,2013(23):4-6.
• [11] Randle V.The Role of the Conincidence Site Lattice in Grain Boundary Engineering[M].Cambridge:Cambridge University Press,1996.
• [12] 夏爽,周邦新,陈文觉.形变及热处理对690合金晶界特征分布的影响[J].稀有金属材料与工程,2008,37(6):999-1003.XIA Shuang,ZHOU Bang-xin,CHEN Wen-jue.Effect of deformation and heat-treatments on the grain boundary character distribution for 690 alloy[J].Rare Metal Materials and Engineering,2008,37(6):999-1003.
• [13] 高钰璧,丁雨田,陈建军,等.基于Σ3～n晶界调控GH3625合金晶界特征分布[J].稀有金属,2018,36(6):1-7.GAO Yu-bi,DING Yu-tian,CHEN Jian-jun,et al.Controlling the Σ3n grain boundary distribution in GH3625 alloy[J].Chinese Journal of Rare Metals,2018,36(6):1-7.
• [14] Nagahama K,Miki I.Precipitation during recrystallization in Al-Mn and Al-Cr alloys[J].Trans Jap Inst Met,1974,15(3):185-192.
• [15] 倪艳荣,李艳华.固溶时间对Al-Ni耐热合金导线组织、硬度和导电性能的影响[J].热加工工艺,2018,47(12):127-129.NI Yan-rong,LI Yan-hua.Effects of solid solution time on microstructure,hardness and conductivity of Al-Ni heat-resistant alloy wire[J].Hot Working Technology,2018,47(12):127-129.
• [16] 田荣璋,王祝堂.铜合金及其加工手册[M].长沙:中南大学出版社,2002.
• [17] 李松瑞,周善初.金属热处理[M].长沙:中南工业大学出版社,2003.
• [18] 董旭刚,金青林,林波,等.微量硼对Cu-15Ni合金显微组织与力学性能的影响[J].铸造,2010,59(5):502-504.DONG Xu-gang,JIN Qing-lin,LIN Bo,et al.Effect of trace boron on microstructures and mechanical properties of Cu-15Ni alloy[J].Foundry,2010,59(5):502-504.
• [19] 雷若姗,陈广润,汪明朴.Nb含量对机械合金化Cu-Nb合金晶粒细化和力学性能的影响(英文)[J].稀有金属材料与工程,2018,47(9):2607-2614.LEI Ruo-shan,CHEN Guang-run,WANG Ming-pu.Effect of Nb solute concentration on crystallite size refinement and strength enhancement in mechanically alloyed Cu-Nb alloys[J].Rare Metal Materials and Engineering,2018,47(9):2607-2614.

文章评论(Comment)：