锻压技术

多向强应变和时效处理对Al-Zn-Mg-Cu合金摩擦磨损性能的影响

英文标题：Influence of multi-directional strong strain and aging treatment on frictional wear properties for Al-Zn-Mg-Cu alloy

作者：曹艳艳严伟林

单位：广西大学资源环境与材料学院广西有色金属及特色材料加工重点实验室

关键词：Al-Zn-Mg-Cu合金多向锻造显微组织力学性能耐磨性

分类号：TG319；TG166.3

出版年,卷(期):页码：2022,47(6):251-256

摘要：

为探明多向强应变和时效处理对AlZnMgCu合金的显微组织、力学性能和摩擦磨损性能的影响，以多向锻造和时效处理工艺加工AlZnMgCu合金，对其显微组织进行了表征，并对其力学性能和摩擦磨损性能进行了测试。研究结果表明：经多向锻造加工后，AlZnMgCu合金的强度和硬度提高，但伸长率和耐磨性却大幅度下降。锻造合金再经120 ℃ × 1320 min时效处理后，强度和硬度进一步提高，伸长率得到明显改善，耐磨性增强。AlZnMgCu合金的抗拉强度、硬度和伸长率分别达到644 MPa、210 HV和14.9%，耐磨性较挤压T6态提高了68.3%。由于高的硬度和加工硬化使耐磨性增强，并且晶界析出相的不连续分布降低了晶界处的应力集中，从而也改善了AlZnMgCu合金的耐磨性。

In order to explore the influences of multi-directional strong strain and aging treatment on microstructure, mechanical properties and friction and wear properties of AlZnMgCu alloy, Al-Zn-Mg-Cu alloy was processed by multi-directional forging and aging process, its microstructure was characterized, and its mechanical properties and friction and wear properties were tested. The results shows that the strength and hardness of AlZnMgCu alloy are increased by multi-directional forging, but its elongation and wear resistance are substantially decreased. After aging treatment for the forged alloy at 120 ℃ for 1320 min, the strength and hardness of AlZnMgCu alloy are further increased, the elongation is significantly improved, and the wear resistance is enhanced. The tensile strength, hardness and elongation of AlZnMgCu are 644 MPa, 210 HV and 14.9%, respectively. The wear resistance is improved by 68.3% compared with the extruded T6 state due to the high hardness and high work hardening. Furthermore, due to the discontinuous distribution of grain boundary precipitates, the stress concentration at grain boundary is reduced, and the wear resistance of AlZnMgCu alloy is also improved.

基金项目：

国家自然科学基金资助项目（51561003）

曹艳艳（1992-），女，硕士研究生 E-mail：13783584696m@sina.cn 通信作者：严伟林（1962-），男，博士，教授 E-mail：yanwlin@gxu.edu.cn

参考文献：

[1]ElAmoush A S. Intergranular corrosion behavior of the 7075T6 aluminum alloy under different annealing conditions [J]. Materials Chemistry and Physics, 2001, 126 (3): 607-613.

[2]Liu J, Cheng Y S, Chan S W N, et al. Microstructure and mechanical properties of 7075 aluminum alloy during complex thixoextrusion [J]. Transactions of Nonferrous Metals Society of China, 2020, 30 (12): 3173-3182.

[3]李周兵, 沈健, 闫亮明, 等. 应变速率对7055铝合金显微组织和力学性能的影响 [J]. 稀有金属, 2010，34 (5): 643-647.

Li Z B, Shen J, Yan L M, et al. Influence of hot process strain rate on microstructures and tensile properties of 7055 aluminum alloy[J]. Chinese Journal of Rare Metals, 2010，34 (5): 643-647.

[4]吴懿萍, 何臻毅, 周志纲, 等. 非等温回归再时效7050铝合金组织与力学性能的影响 [J]. 材料导报, 2019, 33 (Z2): 394-397.

Wu Y P, He Z Y, Zhou Z G, et al. Effect of nonisothermal retrogression and reageing treatments on the microstructure and mechanical properties of 7050 alloy [J]. Materials Reports, 2019, 33 (Z2): 394-397.

[5]Williams J C, Starke Jr E A. Progress in structural materials for aerospace systems [J]. Acta Materialia, 2003, 51 (19): 5775-5799.

[6]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 and Technology, 2021, 85: 106-117.

[7]Valiev R Z, Langdon T G. Principles of equalchannel angular pressing as a processing tool for grain refinement [J]. Progress in Materials Science, 2006, 51 (7): 881-981.

[8]薛克敏, 王晓溪, 李萍. 超细晶材料制备新工艺－挤扭 [J]. 塑性工程学报, 2009, 16 (5): 130-136.

Xue K M, Wang X X, Li P. A new technique for preparing bulk ultrafinegrained materials through twist extrusion [J]. Journal of Plasticity Engineering, 2009, 16 (5): 130-136.

[9]Gupta R, Srivastava S, Kumar N K, et al. High leaded tin bronze processing during multidirectional forging: Effect on microstructure and mechanical properties [J]. Materials Science & Engineering A, 2016, 654: 282-291.

[10]Estrin Y, Vinogradov A. Extreme grain refinement by severe plastic deformation: A wealth of challenging science [J]. Acta Materialia, 2013, 61 (2): 782-817.

[11]马慧娟, 顾艳红, 车俊铁, 等. 表面纳米化对2024铝合金耐磨性能的影响 [J]. 材料保护, 2016, 49 (7): 56-59.

Ma H J, Gu Y H, Che J T, et al. Effect of surface nano crystallization on wear resistance of 2024 aluminum alloy[J]. Journal of Material Protection, 2016, 49 (7): 56-59.

[12]Wen L, Yuan Y, Wang Y M, et al. Effect of nanocrystalline surface and ironcontaining layer obtained by SMAT on tribological properties of 2024 Al alloy [J]. Rare Metal Materials and Engineering, 2015, 44 (6): 1320-1325.

[13]Efe Y, Karademir I, Husem F, et al. Enhancement in microstructural and mechanical performance of AA7075 aluminum alloy via severe shot peening and ultrasonic nanocrystal surface modification [J]. Applied Surface Science, 2020, 528: 1-13.

[14]Chegini M, Shaeri M H. Effect of equal channel angular pressing on the mechanical and tribological behavior of AlZnMgCu alloy [J]. Materials Characterization, 2018, 140: 147-161.

[15]Chegini M, Fallahi A, Shaeri M H. Effect of equal channel angular pressing (ECAP) on wear behavior of Al7075 alloy [J]. Procedia Materials Science, 2015, 11: 95-100.

[16]Kima Y S, Yua H S, Shin D H. Low slidingwear resistance of ultrafinegrained Al alloys and steel having undergone severe plastic deformation [J]. International Journal of Materials Research, 2009, 100 (6): 871-874.

[17]Wang C T, Gao N, Wood R J K, et al. Wear behavior of an aluminum alloy processed by equalchannel angular pressing [J]. Journal of Materials Science, 2011, 46 (1): 123-130.

[18]王耀勉, 卫娟茹, 张聪惠, 等. 高能喷丸对Ti6Al4V钛合金渗碳层耐磨性的影响 [J]. 稀有金属, 2020, 44(5): 449-454.

Wang Y M, Wei J R, Zhang C H, et al. Effect of high energy shot peening on wear resistance of carburized layer of Ti6Al4V alloy [J]. Chinese Journal of Rare Metals, 2020, 44 (5): 449-454.

[19]魏燕, 王伟, 张雁南, 等. 表面喷丸与Fe+注入协同增强Ti13Nb13Zr合金的生物摩擦学性能 [J]. 稀有金属, 2020, 44 (1): 48-55.

Wei Y, Wang W, Zhang Y N, et al. Synergistic enhancement of biotribological properties of Ti13Nb13Zr alloy by surface shot peening and Fe+ implantation [J]. Chinese Journal of Rare Metals, 2020, 44 (1): 48-55.

[20]Li J H, Li F G, Ma X K. Effect of grain boundary characteristic on intergranular corrosion and mechanical properties of severely sheared AlZnMgCu alloy [J]. Materials Science & Engineering A, 2018, 732: 53-62.

[21]孙家枢. 金属的磨损 [M]. 北京: 冶金工业出版社, 1992.

Sun J S. Wear of Metals [M]. Beijing: Metallurgical Industry Press, 1992.

[22]Huang T T, Deng W J, Zhou Y J, et al. Effect of multidirectional forging and ageing on fracture toughness of AlZnMgCu alloys [J]. Materials Science and Technology, 2020, 36 (15): 1648-1654.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】