锻压技术

激光局部热处理对5052-H32铝合金板材单向拉伸性能和成形性能的影响规律

英文标题：Influence law of laser local heat treatment on uniaxial tensile and forming properties for 5052-H32 aluminum alloy sheet

作者：刘芃成1 马彦2 张晓嵩2 宋鸿武2 郑黎1 魏作山3

单位：1.沈阳工业大学 2.中国科学院金属研究所 3.滨州魏桥国科高等技术研究院

关键词：激光局部热处理退火热处理成形极限力学性能铝合金

分类号：TG166.3

出版年,卷(期):页码：2023,48(9):204-212

摘要：

针对5052H32铝合金板材室温下成形性差的问题，采用激光快速加热的方式对板材进行局部热处理，首次开展了对激光局部热处理后板材全应变路径下的成形极限实验，研究激光局部热处理工艺对其成形性能的影响。单向拉伸实验结果表明：对5052H32铝合金板材进行激光局部热处理能够起到显著的软化效果，抗拉强度和屈服强度分别降低17.6%和43.3%，断后伸长率提高117%。应变硬化指数n值随着热处理峰值温度的增加而增加。当传统退火热处理温度达到400 ℃、激光局部热处理峰值温度达到500 ℃时，轧制过程中产生的纤维状组织转变为再结晶组织，织构强度降低。H32态、传统退火热处理和激光局部热处理后板材的成形极限实验结果表明：经过激光局部热处理(400 ℃)后，全应变路径下的成形极限较H32态整体有所提高，极限平面应变FLC0值提高了39.1%，表明激光局部热处理，能够改变5052H32铝合金板的力学性能，并有效提高其成形性。

Aiming at the problem of poor formability of 5052-H32 aluminum alloy sheet at room temperature, the laser rapid heating method was used for local heat treatment on the sheet, for the first time, the forming limit experiment of sheet metal after laser local heat treatment under full strain path was carried out to study the influence of laser local heat treatment process on its formability. The results of uniaxial tensile experiment show that the laser local heat treatment on 5052-H32 aluminum alloy sheet can play a significant softening effect, the tensile strength and yield strength are reduced by 17.6% and 43.3%, respectively, and the elongation after break is increased by 117%. The value of strain hardening index n increases with the increasing of peak temperature of heat treatment. When the temperature of conventional annealing heat treatment reaches 400 ℃ and the peak temperature of laser local heat treatment reaches 500 ℃, the fiber tissue produced during the rolling process is transformed into recrystallized tissue, and the texture strength is reduced. The forming limit experiment results of H32 state, conventional annealing heat treatment and laser local heat treatment show that after laser local heat treatment (400 ℃), the forming limit under full strain path is increased compared with the H32 state as a whole, and the value of ultimate plane strain FLC0 is increased by 39.1%, indicating that the mechanical properties of 5052-H32 aluminum alloy sheet can be changed by laser local heat treatment, and its formability is improved effectively.

基金项目：

魏桥国科高研院-中科院金属所研发项目（GYYJSBU2022003）

作者简介：刘芃成（1998-），男，硕士研究生 E-mail：973518526@qq.com 通信作者：宋鸿武（1981-），男，博士，研究员 E-mail：hwsong@imr.ac.cn

参考文献：

[1]邓学峰，张辉，陈振华.铝合金成形性及成形工艺研究现状[J].材料导报，2005，12(19)：56-59.

Deng X F, Zhang H, Chen Z H. Research status of formability and forming technology of aluminum alloy[J]. Materials Review, 2005, 12(19): 56-59.

[2]蔡辉.5052铝合金材料研究进展[J].铝加工，2011，3(6): 33-39.

Cai H. Research progress of 5052 aluminum alloy materials[J]. Processing of Aluminum, 2011, 3(6): 33-39.

[3]Valiey R Z, Islamgaliey R K, Alexandrov I V, et al. Bulk nanostructured materials from severe plastic deformation[J]. Process in Materials Science, 2000, 45(2): 103-189.

[4]倪江涛，周庆军，衣凤，等.激光增材制造技术发展及在航天领域的应用进展[J].稀有金属，2022，46(10)：1365-1382.

Ni J T, Zhou Q J, Yi F, et al. Development of laser additive manufacturing technology and its application progress in aerospace field[J].Chinese Journal of Rare Metals，2022, 46(10): 1365-1382.

[5]李龙，夏承东，宋友宝，等.铝合金在新能源汽车工业的应用现状及展望[J].轻合金加工技术，2017，45(9)：18-25.

Li L, Xiang C D, Song Y B, et al. Application status and prospect of aluminum alloy in new energy automobile industry[J]. Light Alloy Processing Technology, 2017, 45(9): 18-25.

[6]Bowen J R, Prangnell P B, Jensen D J, et al. Microstructural parameters and flow stress in Al0.13% Mg deformed by ECAE processing[J]. Materials Science and Engineering: A, 2004, 387(12): 235-239.

[7]Tsai T L, Sun P L, Kao P W, et al. Microstructure and tensile properties of a commercial 5052 aluminumalloy processed by equal channel angular extrusion[J]. Materials Science and Engineering: A, 2003, 342(1-2): 144-151.

[8]Kerausch M, Merklein M, Geiger M. Improved material flow for deep drawing of aluminium blanks by local laser heat treatment[A]. 10th International Conference on Sheet Metal[C]. Jordanstown, 2003.

[9]Nguyen H, Merklein M. Advanced laser heat treatment with respect to the application for tailored heat treated blanks [J]. Physics Procedia, 2010, 5(2): 233-242.

[10]Merklein M, Geiger M, Staud D, et al. Tailored heat treated blanks applied on car body parts under quasi series conditions[J]. International Journal of Microstructure and Materials Properties, 2009, 4(5-6): 525-533.

[11]Merklein M, Johannes M, Lechner M, et al. A review on tailored blanks: Production, applications and evaluation[J]. Journal of Materials Processing Technology, 2014, 214(2): 151-164.

[12]刘静安，谢永生.铝合金材料应用与开发[M].北京：冶金工业出版社，2011.

Liu J A, Xie Y S. Application and Development of Aluminum Alloy Materials [M]. Beijing: Metallurgical Industry Press, 2011.

[13]Geiger M, Merklein M, Staud D, et al. An inverse approach to the numerical design of the process sequence of tailored heat treated blanks[J]. Production Engineering, 2008, 2(1): 15-20.

[14]Merklein M, Vogt U. Enhanced formability of ultrafinegrained aluminum blanks by local heat treatments[J]. 2009, 410-411:169-176.

[15]王志坚，王佳乐，宋鸿武，等.局部热处理提高铝合金复杂零件成形性的模拟研究[J].塑性工程学报，2019，26(3)：25-32.

Wang Z J, Wang J L, Song H W, et al. Simulation study on formability improvement of complex aluminum alloy parts through tailored heat treatment[J]. Journal of Plasticity Engineering, 2019, 26(3): 25-32.

[16]高昱霖.激光局部热处理改善2B06铝合金板成形性研究[D].沈阳：沈阳航空航天大学，2020.

Gao Y L. Study on Improving Formability of 2B06 Aluminum Alloy Plate by Laser Local Heat Treatment[D]. Shenyang: Shenyang Aerospace University, 2020.

[17]门正兴.工艺参数对激光选区熔化成形18Ni300钢冲击韧性的影响[J].锻压技术，2022，47(8)：123-129.

Men Z X. Influence of process parameters on impact toughness for 18Ni300 steel formed by selective laser melting[J]. Forging & Stamping Technology, 2022, 47(8): 123-129.

[18]王佳乐.激光局部热处理提高铝合金板材成形性研究[D].沈阳：沈阳航空航天大学，2019.

Wang J L. Research on Improving the Formability of Aluminum Alloy Sheets by Laser Local Treatment [D]. Shenyang: Shenyang Aerospace University,2019.

[19]张晓嵩，陈帅锋，李旺，等.利用激光局部硬化效应提高2B06铝合金板材拉深成形性研究[J].机械工程学报，2022，58(20)：250-259.

Zhang X S, Chen S F, Li W, et al. Study on improving the formability of 2B06 aluminum alloy sheet by local hardening effect using laser heat treatment[J]. Journal of Mechanical Engineering, 2022, 58(20): 250-259.

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