锻压技术

室温下多向锻造及时效处理对7075铝合金力学性能和摩擦磨损性能的影响

英文标题：Effects of multi-directional forging and aging treatment on mechanical properties and friction and wear properties for 7075 aluminum alloy at room temperature

作者：王帆1 赵小莲1 2 3

单位：（1.广西大学资源环境与材料学院广西南宁 530004 2.省部共建特色金属材料与组合结构全寿命安全国家重点实验室广西南宁 530004 3.有色金属及材料加工新技术教育部重点实验室广西南宁 530004）

关键词：7075铝合金多向锻造时效力学性能摩擦磨损

分类号：TG156.92;TG146.21

出版年,卷(期):页码：2024,49(12):1-8

摘要：

Al-Zn-Mg-Cu合金的耐磨性能较差，限制了其在多领域的应用，而现有加工工艺难以使Al-Zn-Mg-Cu合金在获得高强度、良好塑性的同时保持较好的耐磨性能。以7075铝合金为研究对象，通过多向锻造及时效处理，制备出强塑性匹配优异的Al-Zn-Mg-Cu合金，并对其微观组织进行表征，对其力学性能和摩擦磨损性能进行测试。试验结果表明：经过多向锻造处理后试样的强度、硬度上升，但是塑性损失严重，再经时效后合金的塑性得到一定程度的改善。多向锻造后试样呈准解理断裂，再进行时效处理后韧窝数量有所增加，解理平台变少。经多向锻造及时效处理后试样的耐磨性提高了47.4%，其磨损机制主要为磨粒磨损，粘着磨损占比减少。

Abstract: The wear resistance of Al-Zn-Mg-Cu alloy is poor, which limites its application in multiple fields. And the current processing technology is difficult to make Al-Zn-Mg-Cu alloy obtain high strength and good plasticity while maintaining good wear resistance. Therefore, for 7075 aluminum alloy, the Al-Zn-Mg-Cu alloy with excellent strength and plasticity matching was prepared by multi-directional forging and aging treatment, its microstructure was characterized, and its mechanical properties and friction and wear properties were tested. The test results show that the strength and hardness of sample increase after multi-directional forging, but the plasticity loss is serious, and the plasticity of alloy is improved to some extent after aging. After multi-directional forging, the sample shows quasi-cleavage fracture. After aging treatment, the number of dimples increases and the cleavage platform decreases. The wear resistance of sample after multi-directional forging and aging treatment increases by 47.4%. The wear mechanism of sample after multi-directional forging and aging treatment is mainly abrasive wear, and the proportion of adhesive wear is reduced.

基金项目：

基金项目:广西重点研发计划项目（桂科AB22080015）；广西科技基地和人才专项（桂科AD21238010）；中央引导地方科技发展资金专项（桂科ZY21195030）

作者简介：王帆（1998-），男，硕士研究生 E-mail：2115391064@st.gxu.edu.cn 通信作者：赵小莲(1972-)，女，博士，教授 E-mail：xiaolianzhao@gxu.edu.cn

参考文献：

［1］王军,李霜.7A52铝合金轧制厚板探伤缺陷分析
［J］.铝加工,2020,253(2):59-61.

Wang J,Li X.Analysis on defect detection of 7A52 aluminum alloy rolling plate
［J］.Aluminium Fabrication,2020,253(2):59-61.

［2］王磊,许雪宗,王克鸿，等.中厚板7A52铝合金光纤激光焊接接头组织与性能
［J］.焊接学报,2020,41(10):28-31,37,98-99.

Wang L, Xu X Z, Wang K H, et al. Microstructure and properties of 7A52 aluminum alloy fiber laser welded joint
［J］. Journal of the Chinese Welding Society, 2020,41(10):28-31,37,98-99.

［3］张林. 7A52铝合金厚板激光-MIG复合焊接工艺研究
［D］.南京:南京理工大学,2018.

Zhang L. Study on Laser-MIG Composite Welding Process of 7A52 Aluminum Alloy Thick Plate
［D］. Nanjing: Nanjing University of Science and Technology,2018.

［4］吕俊智,李国平,任政,等.7A52/7055铝合金层合结构动态力学性能研究
［J］.兵器材料科学与工程,2019,42(2):1-4.

Lyu J Z, Li G P, Ren Z, et al. Study on dynamic mechanical properties of 7A52/7055 aluminum alloy laminates
［J］. Ordnance Materials Science and Engineering,2019,42(2):1-4.

［5］腾志贵,王立娟,张万金,等.7A52铝合金中粗大化合物的分析
［J］.轻合金加工技术,2009,37(5):12-14.

Teng Z G, Wang L J, Zhang W J, et al. Analysis of coarse compounds in 7A52 aluminum alloy
［J］. Light Alloy Processing Technology,2009,37(5):12-14.

［6］Subramanian C. Some considerations towards the design of a wear resistant aluminium alloy
［J］.Wear,1992,1(115):193-205.

［7］王楠.机器零件摩擦磨损的研究
［J］.品牌与标准化,2022(S2):80-82,86.

Wang N. Research on friction and wear of machine parts
［J］. Brand and Standardization,2022(S2):80-82,86.

［8］田敬成,仲维锋,乔玉新,等.预变形对Al-Zn-Mg铝合金组织及力学性能的影响
［J］.金属热处理,2021,46(3):76-80.

Tian J C, Zhong W F, Qiao Y X, et al. Effect of predeformation on microstructure and mechanical properties of Al-Zn-Mg aluminum alloy
［J］. Heat Treatment of Metals,2021,46(3):76-80.

［9］Elhefnawey M, Shuai G L, Zhang D T, et al. On achieving ultra-high strength and improved wear resistance in Al-Zn-Mg alloy via ECAP
［J］. Tribology International, 2021, 163:107188.

［10］Injor O M, Daramola O O, Adewuyi B O, et al. Grain refinement of Al-Zn-Mg alloy during equal channel angular pressing (ECAP)
［J］. Results in Engineering, 2022, 16:100739.

［11］Gao L L, Cheng X H. Microstructure, phase transformation and wear behavior of Cu-10%Al-4%Fe alloy processed by ECAE
［J］. Materials Science and Engineering A,2008, 473(1-2): 259-265.

［12］Avcu E. The influences of ECAP on the dry sliding wear behaviour of AA7075 aluminium alloy
［J］. Tribology International, 2017, 110: 173-184.

［13］Ortiz-Cuellar E, Hernandez-Rodriguez M A L, García-Sanchez E. Evaluation of the tribological properties of an Al-Mg-Si alloy processed by severe plastic deformation
［J］.Wear, 2011, 271(9-10): 1828-1832.

［14］姜伟之，赵时熙，王春生，等. 工程材料的力学性能
［M］.第2版(修订版).北京：北京航空航天大学出版社，2000.

Jiang W Z, Zhao S X, Wang C S, et al. Mechanical Properties of Engineering Materials
［M］. 2nd Edition (Revised Edition). Beijing: Beihang University Press, 2000.

［15］Pedersen K O, Brvik T, Hopperstad O S. Fracture mechanisms of aluminium alloy AA7075-T651 under various loading conditions
［J］. Materials & Design, 2011, 32(1): 97-107.

［16］Liu X, Huang D, Yan C, et al. Multi-directional forging and aging treatment effects on friction and wear characterization of aluminium-bronze alloy
［J］. Materials Characterization, 2020, 167: 110511.

［17］Shahreza B O, Hernandez-Rodriguez M A L, Garcia-Sanchez E, et al. The impact of microstructural refinement on the tribological behavior of niobium processed by indirect extrusion angular pressing
［J］. Tribology International, 2022, 167: 107412.

［18］Lee Y C, Dahle A K, StJohn D H, et al. The effect of grain refinement and silicon content on grain formation in hypoeutectic Al-Si alloys
［J］. Materials Science and Engineering: A, 1999, 259(1): 43-52.

［19］Sin H, Saka N, Suh N P. Abrasive wear mechanisms and the grit size effect
［J］. Wear, 1979, 55(1): 163-190.

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