周思鹏,孙有平,何江美,胡一杰,杨春洋

• 1:广西科技大学机械与交通工程学院
• 2:广西土方机械协同创新中心
• 3:广西汽车零部件与整车技术重点实验室

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、能谱仪(EDS)、拉伸实验等研究了固溶时效处理对2524铝合金光纤激光焊接接头的显微组织及力学性能的影响。结果表明:焊后固溶时效处理可以显著改善接头区域的元素分布,在495℃固溶处理1 h时后,粗大的第二相基本溶解,接头的抗拉强度、伸长率和硬度分别为421 MPa、12.9%和125.5 HV;随着时效温度的升高,焊缝区硬度更快达到峰值,经190℃时效4 h后,接头的抗拉强度、伸长率和硬度分别为436 MPa、8.0%和134.8 HV。热处理后,接头的热影响区发生再结晶,熔合线附近仍存在粗大的柱状晶,焊缝区晶粒未发生明显改变,焊缝依然是整个焊件最薄弱的区域。

关键词(KeyWords)： 铝合金;激光焊接;焊后热处理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51864006);; 广西高等学校高水平创新团队资助项目(桂教师范[2019]52号);; 广西自然科学基金(2018GXNSFBA281195);; 中央引导地方科技发展专项项目(2021ZYZX1012)

作者(Author): 周思鹏,孙有平,何江美,胡一杰,杨春洋

DOI: 10.13289/j.issn.1009-6264.2021-0104

参考文献(References)：

• [1] 高菁菁.211Z铝合金焊接及焊后热处理工艺研究[D].哈尔滨：哈尔滨工业大学，2013.GAO Jing-jing.Study on welding and post welding heat treatment of 211Z aluminium alloy[D].Harbin:Harbin Institute of Technology,2013.
• [2] 刘兵，彭超群，王日初，等.大飞机用铝合金的研究现状及展望[J].中国有色金属学报，2010(9):1705-1715.LIU Bing,PENG Chao-qun,WANG Ri-chu,et al.Recent development and prospects for giant plane aluminum alloys[J].The Chinese Journal of Nonferrous Metals,2010(9):1705-1715.
• [3] 雷彬彬，周志明，黄伟九，等.Al-Cu-Mg高强铝合金的研究进展 [J].热加工工艺，2012,41(2):41-45.LEI Bin-bin,ZHOU Zhi-ming,HUANG Wei-jiu,et al.Development of high-strength Al-Cu-Mg alloy[J].Hot Working Technology,2012,41(2):41-45.
• [4] Lin Y C,Xia Y C,Jiang Y Q,et al.Precipitation hardening of 2024-T3 aluminum alloy during creep aging[J].Materials Science and Engineering A,2013,565(5):420-429.
• [5] Lin Y C,Xia Y C,Jiang Y Q,et al.Precipitation in Al-Cu-Mg alloy during creep exposure[J].Materials Science and Engineering A,2012,556:796-800.
• [6] 王国军，王祝堂.铝合金在中国民用航空器上的应用[J].轻合金加工技术，2017,45(11):1-11.WANG Guo-jun,WANG Zhu-tang.Application of aluminum alloy on China's civil aircraft[J].Light Alloy Fabrication Technology,2017,45(11):1-11.
• [7] 蔡华.薄板2524高强铝合金光纤激光焊接接头组织及力学性能研究[D].北京：北京工业大学，2013.CAI Hua.Microstructures and mechanical properties of fiber laser beam welded thin sheet 2524 high strength aluminum alloy[D].Beijing:Beijing University of Technology,2013.
• [8] 韩俊，孙有平，张扬扬，等.均匀化退火处理对2524铝合金组织及硬度的影响[J].铸造技术，2015,36(6):1427-1429.HAN Jun,SUN You-ping,ZHANG Yang-yang,et al.Influence of homogenization annealing on microstructures and hardness of 2524 aluminum alloy[J].Foundry Technology,2015,36(6):1427-1429.
• [9] 李国华，蔡艳，高志国，等.航宇铝合金结构激光焊[J].航空制造技术，2007(7):64-66.LI Guo-hua,CAI Yan,GAO Zhi-guo,et al.Laser welding of hangyu aluminum alloy structure[J].Aeronautical Manufacturing Technology,2007(7):64-66.
• [10] Sakamoto H,Shibata K,Dausinger F.Laser welding of different aluminum alloys[C]//Proceedings of the Laser Materials Processing Symposium.Orlando:Laser Institute of America,1993:523-528.
• [11] Shida T,Hirokawa M,Sato S.CO2 laser welding of aluminum alloys (No.1)-welding of aluminum alloys using CO2 laser beam in combination with MIG arc[J].Quarterly Journal of the Japan Welding Society,1997,15:18-23.
• [12] Irose A,Kobayashi K F,Todaka H.CO2 laser beam welding of 6061-T6 aluminum alloy thin plate[J].Metallurgical and Materials Transactions A,1997,28(12):2657-2662.
• [13] 钱红丽，周琦，陈俐，等.7A52铝合金光纤激光焊接头组织性能分析[J].焊接，2014(9):49-52.QIAN Hong-li,ZHOU Qi,CHEN Li,et al.Microstructure and properties analysis of 7A52 aluminum alloy fiber laser welding joint[J].Welding and Joining,2014(9):49-52.
• [14] 虞文军，陈静.国产2024铝合金不同连接工艺下组织和性能的研究[J].应用激光，2012,32(6):484-487.YU Wen-jun,CHEN Jing.Investigation of 2024 Al-alloy welding joint of different welding technology[J].Applied Laser,2012,32(6):484-487.
• [15] 赵礼，朱瑞灿，谢美蓉，等.2195铝锂合金电子束焊接头的焊后热处理[J].金属热处理，2020,45(1):84-90.ZHAO Li,ZHU Rui-can,XIE Mei-rong,et al.Post-weld heat treatment of 2195 Al-Li alloy electron beam welded joint[J].Heat Treatment of Metals,2020,45(1):84-90.
• [16] Sabari S S,Balasubramanian V,Malarvizhi S,et al.Influences of post weld heat treatment on tensile properties of friction stir welded AA2519-T87 aluminium alloy joints[J].Journal of the Mechanical Behavior of Materials,2015,24(5/6):195-205.
• [17] 许良红，田志凌，彭云，等.焊后时效处理和固溶处理对接头组织和性能的影响[J].焊接学报，2008(2):31-34.XU Liang-hong,TIAN Zhi-ling,PENG Yun,et al.Effect of post-weld aging treatment and solution treatment on microstructure and properties of joint[J].Transactions of the China Welding Institution,2008(2):31-34.
• [18] Temmar M,Hadji M,Sahraoui T.Effect of post-weld aging treatment on mechanical properties of Tungsten Inert Gas welded low thickness 7075 aluminium alloy joints[J].Materials and Design,2011,32(6):3532-3536.
• [19] 朱东晖，陈江华，刘春辉，等.焊后热处理对Al-Mg-Si-Cu合金激光焊接接头微观结构和力学性能的影响[J].中国有色金属学报，2015,25(9):2342-2349.ZHU Dong-hui,CHEN Jiang-hua,LIU Chun-hui,et al.Effects of post-weld heat treatment on microstructure and mechanical properties of laser-beam welded Al-Mg-Si-Cu alloy[J].The Chinese Journal of Nonferrous Metals,2015,25(9):2342-2349.
• [20] Shen F H,Yi D Q,Wang B,et al.Semi-quantitative evaluation of texture components and anisotropy of the yield strength in 2524 T3 alloy sheets[J].Materials Science and Engineering A,2016,675:386-395.
• [21] 李学朝.铝合金材料组织与金相图[M].北京：冶金工业出版社，2010.
• [22] 王松辉，孙有平，何江美，等.固溶时效对2524合金板材组织和性能的影响[J].特种铸造及有色合金，2018,38(11):1248-1253.WANG Song-hui,SUN You-ping,HE Jiang-mei,et al.Effects of solid solution and aging treatmeng on microstructure and mechanical properties of 2524 alunminum alloy sheet[J].Special Casting and Nonferrous Alloys,2018,38(11):1248-1253.
• [23] 何易.形变热处理工艺对高强铝合金组织及性能的影响[D].合肥：合肥工业大学 2016.HE Yi.The effect of thermomechnical treatment on microstructure and properties of the high-strength aluminum alloy[D].Hefei:Hefei University of Technology,2016.
• [24] 王松辉，孙有平，何江美，等.均匀化处理对Al-4.5Cu-1.5Mg-0.6Mn-0.2Ti-0.5Zr合金组织及性能的影响[J].材料热处理学报，2018,39(5):37-43.WANG Song-hui,SUN You-ping,HE Jiang-mei,et al.Effect of homogenization treatment on microstructure and mechanical properties of Al-4.5Cu-1.5Mg-0.6Mn-0.2Ti-0.5Zr aluminum alloy[J].Transactions of Materials and Heat Treatment,2018,39 (5):37-43.
• [25] 王双宝.Al-Cu-(Mg)合金的成分、工艺、结构及性能研究[D].长沙：湖南大学，2013.WANG Shuang-bao.The research on composition,structure,heat treatment and properties of Al-Cu-(Mg) alloys[D].Changsha:Hunan University,2013.
• [26] 马贺.Al-Cu-Mg-Y系合金的性能与第一原理计算[D].沈阳：沈阳工业大学，2015.MA He.Performances and first-principle calculation of Al-Cu-Mg-Y alloys[D].Shenyang:Shenyang University of Technology,2015.
• [27] Fu B L,Qin G L,Meng X M,et al.Microstructure and mechanical properties of newly developed aluminum-lithium alloy 2A97 welded by fiber laser[J].Materials Science and Engineering A,2014,617(3):1-11.
• [28] Tsivoulas D,Robson J D.Heterogeneous Zr solute segregation and Al3Zr dispersoid distributions in Al-Cu-Li alloys[J].Acta Materialia,2015,93:73-86.
• [29] Chen A T,Peng Y,Zhang L,et al.Microstructural evolution and mechanical properties of cast Al-3Li-1.5Cu-0.2Zr alloy during heat treatment[J].Materials Characterization,2016,114:234-242.
• [30] MuňOz A C,Rückert G,Huneau B,et al.Comparison of TIG welded and friction stir welded Al-4.5Mg-0.26Sc alloy[J].Journal of Materials Processing Technology,2008,197(1/3):337-343.
• [31] 张理想.7N01铝合金型材焊接接头微观组织表征与力学性能[D].沈阳：东北大学，2014.ZHANG Li-xiang.Microstructure characterization of 7N01S aluminum alloy welded joint and its mechanical properties[D].Shenyang:Northeastern University,2014.
• [32] 何克准，黄淑萍，乐永康，等.固溶处理对7021铝合金组织与性能的影响[J].特种铸造及有色合金，2016,36(11):1211-1214.HE Ke-zhun,HUANG Shu-ping,LE Yong-kang,et al.Effects of solid solution treatment on microsturcture and mechanical properties of 7021 aluminum.alloy[J].Special Casting and Nonferrous Alloys,2016,36(11):1211-1214.

文章评论(Comment)：