周泽宇,雷金琴,肖翔,李冲,刘永长

• 1:天津大学材料科学与工程学院
• 2:中铝材料应用研究院有限公司
• 3:东北轻合金有限责任公司

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、差热分析(DSC)和电子拉力试验机等研究了Al-2.5Cu-0.3Mg合金线材经不同温度固溶处理后的组织和性能。结果表明：冷拉拔态Al-2.5Cu-0.3Mg合金线材的晶粒沿变形方向拉长，组织内含有大量Al_2Cu相；经过495～510℃固溶处理后，组织发生完全再结晶；随着固溶温度的升高，Al_2Cu相逐渐回溶，DSC热焓值降低；经自然时效后组织内析出纳米级强化团簇，合金的抗拉强度、剪切强度和腐蚀性能逐渐提高；当固溶温度升高至510℃时，合金的剪切强度提高至257 MPa,点蚀深度降低至39μm。

关键词(KeyWords)： Al-Cu-Mg合金;铝合金线材;固溶处理;组织;性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2023YFB3710501);; 中铝集团科技重大专项(HX2423)

作者(Author): 周泽宇,雷金琴,肖翔,李冲,刘永长

DOI: 10.13289/j.issn.1009-6264.2024-0026

参考文献(References)：

• [1] Zhang M,Wang J,Wang B,et al.Quantifying the effects of Sc and Ag on the microstructure and mechanical properties of Al-Cu alloys[J].Materials Science and Engineering A,2022,831:142355.
• [2] Zou Y,Wu X,Tang S,et al.Investigation on microstructure and mechanical properties of Al-Zn-Mg-Cu alloys with various Zn/Mg ratios[J].Journal of Materials Science & Technology,2021,85:106-117.
• [3] 余文涛，孟祥炜，张晗，等.杂质Fe和Si对Al-Cu-Mn-Mg合金显微组织及力学性能的影响[J].材料热处理学报，2023,44(12):35-43.YU Wen-tao,MENG Xiang-wei,ZHANG Han,et al.Effect of impurities Fe and Si on microstructure and mechanical properties of Al-Cu-Mn-Mg alloy[J].Transactions of Materials and Heat Treatment,2023,44(12):35-43.
• [4] 李惠曲，王亮，臧金鑫，等.7050高强铝合金铆钉丝材T73双级时效工艺[J].金属热处理，2023,48(3):112-117.LI Hui-qu,WANG Liang,ZANG Jin-xin,et al.T73 two-stage aging process of 7050 high-strength aluminum alloy rivet wire[J].Heat Treatment of Metals,2023,48(3):112-117.
• [5] 王鹏宇，叶凌英，柯彬，等.晶粒组织对Al-Zn-Mg合金力学性能和腐蚀性能的影响[J].材料导报，2023,37(19):173-179.WANG Peng-yu,YE Ling-ying,KE Bin,et al.Effect of grain structure on mechanical and corrosion properties of Al-Zn-Mg alloy[J].Materials Reports,2023,37(19):173-179.
• [6] 赵倩.5056铝合金线材组织性能相关性研究[D].北京：北京有色金属研究总院，2023.ZHAO Qian.Correlation study of microstructure and properties of 5056 aluminum alloy wire[D].Beijing:General Research Institute for Nonferrous Metals,2023.
• [7] Liu F,Liu Z Y,He G Y,et al.Dislocation ordering and texture strengthening of naturally aged Al-Cu-Mg alloy[J].Journal of Materials Science & Technology,2022,118:1-14.
• [8] 王经涛，孙宁，余浪，等.固溶方式对Al-Zn-Mg-Cu合金组织及性能的影响[J].航空材料学报，2023,43(6):65-72.WANG Jing-tao,SUN Ning,YU Lang,et al.Effect of solution treatment on microstructure and properties of Al-Zn-Mg-Cu alloy[J].Journal of Aeronautical Materials,2023,43(6):65-72.
• [9] 金万军，李茂真，肖翔，等.2A12铝合金高锁螺母收口裂纹产生的原因[J].轻合金加工技术，2022,50(7):63-67.JIN Wan-jun,LI Mao-zhen,XIAO Xiang,et al.Causes for the closing crack of 2A12 aluminum alloy high lock nut[J].Light Alloy Fabrication Technology,2022,50(7):63-67.
• [10] Wang B,Yi Y,He H,et al.Effects of deformation temperature on second-phase particles and mechanical properties of multidirectionally-forged 2A14 aluminum alloy[J].Journal of Alloys and Compounds,2021,871:159459.
• [11] Garchani F,Lgaz H,Kaya S,et al.Effects of heat treatment on the corrosion behavior and mechanical properties of aluminum alloy 2024[J].Journal of Materials Research and Technology,2023,25:1355-1363.
• [12] Yang H,Huang R,Zhang Y,et al.Effect of rolling deformation and passes on microstructure and mechanical properties of 7075 aluminum alloy[J].Ceramics International,2023,49(1):1165-1177.
• [13] 韩茜，李茂扬，秦国飞，等.固溶时效处理对8030铝合金导线组织性能的影响[J].金属热处理，2021,46(8):125-132.HAN Qian,LI Mao-yang,QIN Guo-fei,et al.Effect of solution treatment and aging on microstructure and properties of 8030 aluminum alloy conducting wire[J].Heat Treatment of Metals,2021,46(8):125-132.
• [14] 孙宁，王芝东，王经涛，等.单级固溶对Al-Zn-Mg-Cu合金厚板组织及性能的影响[J].金属热处理，2023,48(11):235-240.SUN Ning,WANG Zhi-dong,WANG Jing-tao,et al.Effect of single-tage solution treatment on microstructure and properties of Al-Zn-Mg-Cu alloy thick plate[J].Heat Treatment of Metals,2021,46(8):125-132.
• [15] 李冰，陈星合，付博文，等.7075铝合金线材连续流变挤压与双级时效热处理研究[J].稀有金属，2023,47(9):1195-1203.LI Bing,CHEN Xing-he,FU Bo-wen,et al.Continuous rheo-extrusion and double aging heat treatment of 7075 aluminum alloy wire[J].Chinese Journal of Rare Metals,2023,47(9):1195-1203.
• [16] 郭丰佳，麻芳，肖富来，等.固溶处理对Al-Zn-Cu-Mg-Zr-Ce合金组织性能的影响[J].金属热处理，2023,48(6):121-125.GUO Feng-jia,MA Fang,XIAO Fu-lai,et al.Effect of solution treatment on microstructure and properties of Al-Zn-Cu-Mg-Zr-Ce alloy[J].Heat Treatment of Metals,2023,48(6):121-125.
• [17] 王小娜，韩利战，顾剑锋.铝合金时效析出动力学及强化模型[J].中国有色金属学报，2013,23(10):2754-2768.WANG Xiao-na,HAN Li-zhan,GU Jian-feng.Aging precipitation kinetics and strengthening models for aluminum alloys[J].The Chinese Journal of Nonferrous Metals,2013,23(10):2754-2768.
• [18] Krill III C E,Chen L Q.Computer simulation of 3-D grain growth using a phase-field model[J].Acta Materialia,2002,50(12):3059-3075.
• [19] 李茂华，陈志龙，徐伊雯，等.固溶处理对7475铝合金组织和拉伸性能的影响[J].云南大学学报(自然科学版),2024,46(1):127-135.LI Mao-hua,CHEN Zhi-long,XU Yi-wen,et al.Effect of solution treatment on microstructure and mechanical properties of 7475 A1 alloy[J].Journal of Yunnan University(Natural Sciences Edition),2024,46(1):127-135.
• [20] Lifshitz I,Slyozov V.The kinetics of precipitation from supersaturated solid solution[J].Journal of Physics & Chemistry of Solids,1961,19(1):35-50.
• [21] 刘亚强，李国明，陈珊，等.铜离子及电位对5083铝合金阴极保护行为的影响[J].材料保护，2017,50(5):88-91.LIU Ya-qiang,LI Guo-ming,CHEN Shan,et al.Influences of copper ions and potential on cathodic protection behaviors of aluminum alloy 5083[J].Materials Protection,2017,50(5):88-91.
• [22] Qi X,Song R G,Qi W J,et al.Consistent variation of stress corrosion cracking susceptibility and passive film-induced stress for 7050 aluminum alloy with polarization potential[J].Rare Metal Materials and Engineering,2016,45(8):1943-1948.
• [23] 孙擎擎，陈启元，陈康华.不同热处理7150铝合金的点蚀电位与应力腐蚀敏感性[J].中国有色金属学报，2016,26(7):1400-1407.SUN Qing-qing,CHEN Qi-yuan,CHEN Kang-hua.Link between pitting potentials and stress cracking corrosion susceptibility of 7150 Al alloy with different ageing processes[J].The Chinese Journal of Nonferrous Metals,2016,26(7):1400-1407.
• [24] Wang L,Liang J,Li H,et al.Quantitative study of the corrosion evolution and stress corrosion cracking of high strength aluminum alloys in solution and thin electrolyte layer containing Cl[J].Corrosion Science,2021,178:109076.
• [25] Zhao Q,Guo C,Niu K,et al.Long-term corrosion behavior of the 7A85 aluminum alloy in an industrial-marine atmospheric environment[J].Journal of Materials Research and Technology,2021,12:1350-1359.
• [26] Li N,Dong C,Man C,et al.Insight into the localized strain effect on micro-galvanic corrosion behavior in AA7075-T6 aluminum alloy[J].Corrosion Science,2021,180:109174.
• [27] 余代尧，黄兴民，赵君文，等.固溶温度对7A85铝合金显微组织和断裂机理的影响[J].材料热处理学报，2022,43(12):36-44.YU Dai-yao,HUANG Xing-min,ZHAO Jun-wen,et al.Effect of solution temperature on microstructure and fracture mechanism of 7A85 aluminum alloy[J].Transactions of Materials and Heat Treatment,2022,43(12):36-44.
• [28] Zhou B,Liu B,Zhang S,et al.Microstructure evolution of recycled 7075 aluminum alloy and its mechanical and corrosion properties[J].Journal of Alloys and Compounds,2021,879:160407.
• [29] 余文涛，郝启堂，李新雷，等.Mg元素含量对Al-Cu-Mn-Mg合金过烧行为的影响[J].材料热处理学报，2022,43(11):49-56.YU Wen-tao,HAO Qi-tang,LI Xin-lei,et al.Effect of Mg content on over-burning behavior of Al-Cu-Mn-Mg alloy[J].Transactions of Materials and Heat Treatment,2022,43(11):49-56.

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