Transactions of Materials and Heat Treatment

Title：Influence of rolling scheme on 7075 aluminum alloy T6 plates

Authors： Wu Lei He Bing Shi Weihe Gu Bin Qin Wendong Lu Liyun Qin Ming

Unit： Engineering Research Center of Advanced Aluminium Matrix Materials of Guangxi Province School of Materials Science and Engineering Baise University

KeyWords： 7075 aluminum alloy rolling T6 heat treatment conductivity solution

ClassificationCode：TG166.3

year,vol(issue):pagenumber：2022,47(11):159-164

Abstract：

For 7075 aluminum alloy plates, two rolling schemes of multi-pass for thick plate and single-pass for thin plate were adopted, and the rolled aluminum alloy plates with similar thickness were obtained. Then, the metallographic structure, tensile properties and fracture morphology of aluminum alloy plates after T6 heat treatment were compared, and the undissolved phase and precipitated phases in the plate were observed and analyzed. Furthermore, the conductivities of aluminum alloy plates after solution water quenching and T6 heat treatment was measured respectively, and the factors affecting the conductivity were analyzed. The results show that the grains of the aluminum alloy plate in scheme 1 are elongated, the grain boundaries are obvious, the dimples in the tensile fracture are small and uniform, the precipitation particles are dispersed and distributed, and the uniformity of the structure is better. In scheme 2, the undissolved phase particles with coarse particles can be observed in the fracture of the aluminum alloy plate. The strength and conductivity of the aluminum alloy plate in scheme 1 are slightly higher than those of scheme 2, while the elongation is slightly lower. The aluminum alloy plate in scheme 1 has better performance and is suitable for the pursuit of performance indicators. However, although the performance of the aluminum alloy plate in scheme 2 is slightly lower, it has higher production efficiency and less energy consumption, which is suitable for emphasizing production efficiency and energy consumption control.

Funds：

国家自然科学基金资助项目(51961001)；广西壮族自治区教育厅“稀土合金结构研究与性能开发重点实验室”培育基地项目（RZ2000003730）

作者简介：武磊（1981-），男，博士，工程师，E-mail：toalbvi@163.com；通信作者：覃铭（1963-），男，学士，教授，E-mail：13507767466@163.com

Reference：

[1]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，2010，20(9):1705-1715.

Liu B，Peng C Q，Wang R C，et al. Recent development and prospects for giant plane aluminum alloys[J].The Chinese Journal of Nonferrous Metals，2010，20(9):1705-1715.

[2]夏华丹.轧制变形量对汽车用7075铝合金组织和力学性能的影响[J].热加工工艺，2019，48(11):104-106.

Xia H D. Effects of rolling deformation on microstructure and mechanical properties of 7075 aluminum alloy for automobile[J].Hot Working Technology，2019，48(11):104-106.

[3]王梦寒，咸国材，黄龙.时效温度对轧制态7075 铝合金组织及性能的影响[J].金属热处理，2014，39(5):129-131.

Wang M H，Xian G C，Huang L. Effects of aging temperature on microstructure and mechanical properties of as-rolled 7075 aluminum alloy[J].Heat Treatment of Metals，2014，39(5):129-131.

[4]陈扬，孙正启，张晓欣，等.热处理工艺参数对 7075 铝合金 T6 态组织和性能的影响[J].塑性工程学报，2021，28(7):145-149.

Chen Y，Sun Z Q，Zhang X X，et al. Effect of heat treatment process parameters on microstructure and properties of 7075 aluminum alloy in T6 state[J].Journal of Plasticity Engineering，2021，28(7):145-149.

[5]曹艳艳，黄甜甜，韦春华，等. 多向强应变-时效下7075合金组织、拉伸及抗晶间腐蚀性能[J].金属热处理，2021，46(6)：168-172.

Cao Y Y，Huang T T，Wei C H，et al. Microstructure, tensile properties and intergranular corrosion resistance of 7075 aluminum alloy under multi-directional severe strain and aging[J].Heat Treatment of Metals，2021，46(6):168-172.

[6]Mohammad Mehdi Amiri, Faramarz Fereshteh-Saniee. Influence of roll speed difference on microstructure, texture and mechanical properties of 7075 aluminum plates produced via combined continuous casting and rolling process[J]. Transactions of Nonferrous Metals Society of China，2021，31：901-912.

[7]Hidalgo P, Cepeda-Jiménez C M, Ruano O A, et al. Influence of the processing temperature on the microstructure, texture, and hardness of the 7075 aluminum alloy fabricated by accumulative roll bonding[J]. Metallurgical and Materials Transactions A, 2010，41:758-767.

[8]Jiang J F, Liu Y Z, Xiao G F, et al. Effect of pass reduction on microstructure, mechanical properties and texture of hot-rolled 7075 alloy[J]. Materials Characterization, 2019，147:324-339.

[9]宋仁国，祁星. 高强铝合金热处理工艺、应力腐蚀与氢脆[M]. 北京：科学出版社，2021.

Song R G，Qi X. Heat treatment process, stress corrosion and hydrogen embrittlement of high strength aluminium alloy [M]. Beijing: Science Press，2021.

[10]李鑫，董焱章，王峰.铜电导率关于拉伸变形的影响模型[J].湖北汽车工业学院学报，2018，32(1)：60-63.

Li X，Dong Y Z，Wang F. Influence model of tensile deformation on copper conductivity[J].Journal of Hubei University of Automotive Technology，2018，32(1):60-63.

[11]《中国电力百科全书》编辑委员会. 中国电力百科全书[M]. 北京：中国电力出版社，2001.

Editorial Committee of China Electric Power Encyclopedia. China Electric Power Encyclopedia[M]. Beijing: China Electric Power Press，2001.

[12]张亚宁，严文，陈建. 塑性变形对单晶铜线材导电性影响的研究[J].西安工业学院学报，2005，25(2)：150-152.

Zhang Y N，Yan W，Chen J. Effects of plastic deformation on the electric property of single crystal copper wires[J].Journal of Xi′an Institute of Technology，2005，25(2):150-152.

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