Citation: | WU Lei, HE Bing, QIN Wendong, QIN Ming. Effect of asymmetrical and symmetrical rolling on mechanical properties of 7075 aluminum plates[J]. Nonferrous Metals Science and Engineering, 2024, 15(3): 400-406. DOI: 10.13264/j.cnki.ysjskx.2024.03.010 |
To further develop a highly efficient rolling process for 7075 aluminum plates, this paper carried out an experimental study on the effects of asymmetrical and symmetrical rolling on the mechanical properties of 7075 aluminum plates, and adopted four different rolling cumulative deformation ratios. The experiment was conducted in two steps. The first step was an experiment on the variation of the bending degree of the rolled plate with different asymmetrical rolling speed ratios. The distances y between the highest point of the inner bent surface and the horizontal bottom surface, and the distance x between the inner surface's two contact points of the bent inner surface and the horizontal bottom surface were measured, with the inner surface of the rolled plate facing the horizontal bottom surface. The y/x value was used to describe the bending degree of the rolled plate. The second step was asymmetrical and symmetrical rolling experiments. The experimental results show that the bending degree of the rolled plate is the maximum when the speed ratio is 1.12, and the y/x value can reach 0.222 18. However, even though the same design cumulative deformation rate is used, the actual cumulative deformation ratios of the rolled plates produced by asymmetrical and symmetrical rolling differ by 1% to 2%. When the actual cumulative deformation rate of the rolled plate reaches 76%, the recrystallization in the rolled plates is more effective during T6 heat treatment, and the amount of small and medium-sized crystal grains generated by recrystallization increases. After T6 heat treatment, a large number of dimples with a size of less than 1 μm and small second phase particles with a size of less than 100 nm can be visible in the fracture of the 7075 aluminum plates after 6 passes of asymmetrical and symmetric rolling. Asymmetrically rolled 7075 aluminum plate has smaller dimples than that in symmetrically rolled. Compared with symmetrical rolling, asymmetrical rolling just slightly increases the strength of the 7075 aluminum plate. When a specific level of deformation is reached, the strength peak of the 7075 aluminum plate rolled symmetrically will appear. However, the strength of the 7075 aluminum plate by asymmetrically rolling continually increases with increasing rolling cumulative deformation ratio.
[1] |
HEINZ A, HASZLER A, KEIDEL C, et al. Recent development in aluminium alloys for aerospace applications[J]. Materials Science and Engineering: A, 2000, 280(1): 102-107.
|
[2] |
ROMETSCH P A, ZHANG Y, KNIGHT S. Heat treatment of 7xxx series aluminium alloys-some recent developments[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(7): 2003-2017.
|
[3] |
朱炳耀, 贾小波. 超声振动原位Al2O3(p)/7075 汽车零件合金组织与耐腐蚀性能研究[J]. 有色金属科学与工程, 2023,14(4): 511-517.
|
[4] |
叶拓, 唐明, 刘吉兆, 等. 固溶温度对7075铝合金板材组织与力学性能的影响[J]. 金属热处理, 2022, 47(3): 119-123.
|
[5] |
李晓含, 贺嘉宁, 苏睿明, 等. 双级时效对7075合金应力腐蚀性能影响 [J]. 有色金属科学与工程, 2022, 13(3): 69-75.
|
[6] |
付垚, 谢水生, 熊柏青, 等. 主应力法计算蛇形轧制的轧制力[J]. 塑性工程学报, 2010, 17(6): 103-109.
|
[7] |
武磊, 何兵, 覃铭. 龙形轧制轧板的弯曲控制和其对性能影响的研究综述[J]. 热加工工艺, 2024(9): 8-12.
|
[8] |
于九明, 贾广凤, 朱泉. 异步轧制极薄带材的变形特点及“弹性塞”原理[J]. 东北工学院学报,1982, 3(3): 17-27.
|
[9] |
KRANER J, FAJFAR P, PALKOWSKI H, et al. Microstructure and texture evolution with relation to mechanical properties of compared symmetrically and asymmetrically cold rolled aluminum alloy[J]. Metals, 2020, 10(2): 156-170.
|
[10] |
KAZEMI-NAVAEE A, JAMAATI R, AVAL H J. Asymmetric cold rolling of AA7075 alloy: the evolution of microstructure, crystallographic texture, and mechanical properties[J]. Materials Science and Engineering: A, 2021, 824: 141801.
|
[11] |
PARK B H, HWANG S M. Analysis of front end bending in plate rolling by the finite element method[J]. Journal of Manufacturing Science and Engineering, 1997, 119(3): 314-323.
|
[12] |
JIANG L Y, ZHAO C J, YUAN G, et al. Thicker steel plate shape-changing law and control method during the snake rolling process[J]. Metallurgical Research & Technology, 2016, 113(3): 309.
|
[13] |
CORUS B V, VAN DER WINDEN M R. Method for processing a metal slab or billet, and product produced using said method[P]. WO03022469A1, 2003-03-20.
|
[14] |
付垚, 谢水生, 熊柏青, 等. 铝合金蛇形轧制轧板曲率解析模型研究[J]. 稀有金属, 2011, 35(6): 805-811.
|
[15] |
郑细昭, 吴运新, 张涛, 等. 龙形轧制工艺参数对铝合金厚板心部剪切变形的影响[J]. 热加工工艺, 2014, 43(11): 89-93.
|
[16] |
FU Y, XIE S S, XIONG B Q, et al. Effect of rolling parameters on plate curvature during snake rolling[J]. Journal of Wuhan University of Technology (Materials Science Edition), 2012, 27(2): 247-251.
|
[17] |
雷军义, 江连运, 孟庆成. 厚板蛇形轧制压下量与咬入条件分析与研究[J]. 重型机械, 2018(3): 21-25.
|
[18] |
TAJALLY M, HUDA Z. Recrystallization kinetics for aluminum alloy 7075[J]. Metal Science and Heat Treatment, 2011, 53(5): 213-217.
|
[19] |
ZOU Y, WU X D, TANG S B, 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.
|
[20] |
AZARNIYA A, TAHERI A K, TAHERI K K. Recent advances in ageing of 7xxx series aluminum alloys: a physical metallurgy perspective[J]. Journal of Alloys and Compounds, 2019, 781: 945-983.
|
[21] |
KRANER J,FAJFAR P,PALKOWSKI H,et al. Microstructure and texture evolution with relation to mechanical properties of compared symmetrically and asymmetrically cold rolled aluminum alloy[J]. Metals, 2020, 10(2): 156-170.
|
[22] |
JIANG J H, DING Y, ZUO F Q, et al. Mechanical properties and microstructures of ultrafine-grained pure aluminum by asymmetric rolling[J]. Scripta Materialia, 2009, 60(10): 905-908.
|
[23] |
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.
|
[1] | FAN Wenxin, GAO Yang, WANG Pengfei, CHEN Yan, YUAN Xia, PENG Lijun, FU Yabo, ZHANG Zhongtao. Effect of Ni and Si additions on the microstructure and mechanical properties of Cu-7Sn alloy[J]. Nonferrous Metals Science and Engineering, 2025, 16(1): 85-95. DOI: 10.13264/j.cnki.ysjskx.2025.01.010 |
[2] | MAO Pengyan, ZHAO Hui, LI Hongda. Effect of Al content on microstructure and mechanical properties of AlxCoCrFeNi high-entropy alloys[J]. Nonferrous Metals Science and Engineering, 2024, 15(6): 867-876. DOI: 10.13264/j.cnki.ysjskx.2024.06.010 |
[3] | DU Mingxing, LENG Jinfeng, LI Zhanzhi, YIN Yuhu. Effect of trace Er and Zr addition on mechanical properties of 6082 Al alloy during solid solution-aging treatment[J]. Nonferrous Metals Science and Engineering, 2024, 15(1): 139-146. DOI: 10.13264/j.cnki.ysjskx.2024.01.017 |
[4] | YANG Yuping, SU Ruiming, MA Siyi, NIE Sainan, LI Guanglong. Effects of Ni on structure and mechanical properties of Al-Cu-Mn alloy[J]. Nonferrous Metals Science and Engineering, 2023, 14(1): 67-73. DOI: 10.13264/j.cnki.ysjskx.2023.01.009 |
[5] | XIE Fanghao, LI Jianan, DENG Shenghua, LI Weirong. The microstructure and mechanical properties of selective laser melted Al-Zn-Mg-Sc alloy[J]. Nonferrous Metals Science and Engineering, 2022, 13(4): 61-69. DOI: 10.13264/j.cnki.ysjskx.2022.04.008 |
[6] | QUAN Yongqi, CHENG Hanming, WANG Herui, ZHAO Yao, LIN Gaoyong. Effects of heat treatment on the microstructure and mechanical properties of die casting AlSi10MnMg alloy[J]. Nonferrous Metals Science and Engineering, 2022, 13(2): 98-106. DOI: 10.13264/j.cnki.ysjskx.2022.02.014 |
[7] | CHEN Weiqing, XU Guanming, CUI Ziyi, YU Jiatian, ZHANG Xuehui, WANG Chunming. Microstructure and mechanical properties of 7B85 alloy ultrasonic rolling treated 7B85 alloy[J]. Nonferrous Metals Science and Engineering, 2021, 12(6): 80-87. DOI: 10.13264/j.cnki.ysjskx.2021.06.011 |
[8] | QI Haiquan, QIN Xiangzhi, SUN Yanhuan, LYU Yuan, WU Shunyi, RUAN Rencheng. Mechanical properties of Q235/5083 dissimilar material self-impact riveting head[J]. Nonferrous Metals Science and Engineering, 2018, 9(6): 45-49. DOI: 10.13264/j.cnki.ysjskx.2018.06.007 |
[9] | LIU Zhenlin, LI Yongliang, ZHU Maohua, LI Maowang, YANG Zhanbing, WANG Fuming, SUN Yuhan. The influence of Al content on the mechanical of energy-storing lead-base dashpot[J]. Nonferrous Metals Science and Engineering, 2015, 6(2): 37-41. DOI: 10.13264/j.cnki.ysjskx.2015.02.007 |
[10] | HUANG Lihua, ZHANG Tao, ZHANG Xiaobo. Effects of heat treatment and extrusion on the microstructures and mechanical properties of WE53 magnesium alloy[J]. Nonferrous Metals Science and Engineering, 2014, 5(6): 67-70. DOI: 10.13264/j.cnki.ysjskx.2014.06.011 |