锻压技术

螺旋通道转角挤压变形对6005铝合金静态峰时效的影响

英文标题：Influence of helical channel angular pressing on static peak aging for 6005 aluminum alloy

作者：梁瑞康何敏顾云杰蹇昕祎宋少华尹凡

分类号：TG379

出版年,卷(期):页码：2023,48(10):123-128

摘要：

为研究螺旋通道转角挤压变形对6005铝合金静态峰时效的影响规律，对固溶和螺旋通道转角挤压变形及不同时效工艺处理后的试样进行维氏硬度实验和差示扫描量热实验，分析了不同处理方法下的硬度变化规律和析出相及激活能。结果表明：螺旋通道转角挤压大塑性变形促进了固溶态6005铝合金中激活能相对较低的GP区和β″相的动态析出，起到了析出强化作用，使人工静态峰时效温度从180 ℃降低至140 ℃。由于位错强化、细晶强化和析出强化的共同作用，使静态峰时效硬度从65.00 HV提高至71.62 HV。同时，由于大塑性变形过程中存在动态析出相，提高了β′相和β相的静态析出温度和析出激活能，β′相的析出温度提高了25 ℃，析出激活能提高了12 kJ·mol-1，β相的析出温度提高了33 ℃，析出激活能提高了42 kJ·mol-1，使后续析出变得困难，热稳定性提高。

In order to study the influence lows of helical channel angular pressing on the static peak aging for 6005 aluminum alloy, the Vickers hardness tests and the differential scanning calorimetry tests were conducted on the specimens treated by solid solution, helical channel angular pressing and different aging processes, and the hardness change rules, precipitated phases and activation energy under different treatment methods were analyzed. The results show that the severe plastic deformation of the helical channel angular pressing promotes the dynamic precipitation of GP zone and β″ phase with relatively low activation energy in the solid solution 6005 aluminum alloy, which plays a role in precipitation strengthening and reduces the artificial static peak aging temperature from 180 ℃ to 140 ℃. Due to the joint effects of dislocation strengthening, grain fine strengthening and precipitation strengthening, the static peak aging hardness increases from 65.00 HV to 71.62 HV. At the same time, due to the existence of dynamic precipitation phases during severe plastic deformation process, the static precipitation temperature and the precipitation activation energy of β′ phase and β phase are increased. The precipitation temperature of β′ phase is increased by 25 ℃, and the precipitation activation energy is increased by 12 kJ·mol-1, while the precipitation temperature of β phase is increased by 33 ℃ and the precipitation activation energy is increased by 42 kJ·mol-1, which makes the subsequent precipitation difficult and improves the thermal stability.

基金项目：

江苏省第五期“333工程”科研项目（BRA2020248）；徐州市科技计划项目（KC20189）；江苏省高等学校大学生创新创业训练计划项目（xcx2022135）

梁瑞康（2001-），男，本科生 E-mail：18962698604@163.com

参考文献：

［1］Segal V M. Materials processing by simple shear
［J］.Materials Science and Engineering A,1995,197:157-164.

［2］Terence G L. Research on bulk nanostructured materials in Ufa: Twenty years of scientific achievements
［J］. Materials Science and Engineering A, 2009,503:6-9.

［3］崔振杰. 高速磁浮列车用AlMgSi合金的停放效应及耐腐蚀性能研究
［D］.合肥:中国科学技术大学,2023.

Cui Z J. Study on the Negative Natural Aging Effect and Corrosion Resistance of AlMgSi Alloys for Highspeed Maglev Train
［D］. Hefei:University of Science and Technology of China, 2023.

［4］何敏. 一种制备超细晶块体材料的模具及方法
［P］.中国:ZL 201410040971.9，2014-01-28.

He M. Die and method for preparing ultrafine grain bulk material
［P］. China: ZL 201410040971.9，2014-01-28.

［5］何敏,古京九,杨峰,等. 旋转通道径角挤压工艺制备 UFG 铝合金润滑条件研究
［J］. 润滑与密封, 2020,45(11):111-117.

He M, Gu J J, Yang F, et al. Lubrication research for preparing bulk ultrafine grained aluminum alloy by helical channel angular pressing process
［J］. Lubrication Engineering,2020,45(11):111-117.

［6］Cai M, Field D P, Lorimer G W. A systematic comparison of static and dynamic ageing of two AlMgSi alloys
［J］. Materials Science and Engineering A，2004, 373: 65-71.

［7］刘刚,张鹏,杨冲,等.铝合金中的溶质原子团簇及其强韧化
［J］.金属学报,2021,57(11):1484-1498.

Liu G, Zhang P, Yang C, et al. Aluminum alloys: Solute atom clusters and their strengthening
［J］. Acta Metallurgica Sinica,2021,57(11):1484-1498.

［8］温柏杨. 微量合金元素对6000系铝合金中β″相及β″/Al界面的第一性原理研究
［D］.重庆：重庆大学,2018.

Wen B Y. Firstprinciples Study of β″ and β″/Al Interfaces in 6000-series Aluminum Alloys Adding Trace Amount of Alloying Elements
［D］. Chongqing:Chongqing University,2018.

［9］徐峥峥,刘崇宇,周文标,等.淬火方式对6005A铝合金微观组织及力学性能的影响
［J］.热加工工艺,2022,51(6):121-125.

Xu Z Z, Liu C Y, Zhou W B, et al. Effects of quenching method on microstructure and mechanical properties of 6005A aluminum alloy
［J］. Hot Working Technology, 2022,51(6):121-125.

［10］刘满平,韦江涛,李毅超,等.等通道转角挤压AlMgSi铝合金的动态时效特性和力学性能
［J］.材料研究学报,2016,30(10):721-730.

Liu M P, Wei J T, Li Y C, et al. Dynamic aging behavior and mechanical properties of an AiMgSi aluminium alloy induced by equal channel angular pressing
［J］. Chinese Journal of Materials Research,2016,30(10):721-730.

［11］王操,王丽萍,屈玉石,等.铝合金差示扫描量热分析（DSC）的影响因素研究
［J］.铝加工,2020,(3):24-26.

Wang C, Wang L P, Qu Y S, et al. Study on inflencing factors of Differential Scanning Calorimetry (DSC) of aluminum alloy
［J］. Aluminium Fabrication,2020,(3):24-26.

［12］姜瑞姣,高飞,赵树丰,等.亚微米Al2O3P/AlCuMg复合材料时效过程的DSC分析
［J］.科技创新导报,2014,11(19):245-246.

Jiang R J, Gao F, Zhao S F, et al. DSC analysis of aging behavior for submicron Al2O3P/AlCuMg composites
［J］. Science and Technology Innovation Herald,2014,11(19):245-246.

［13］Ghosh K S,Gao N. Determination of kinetic parameters from calorimetric study of solid state reactions in 7150 AlZnMg alloy
［J］. Transactions of Nonferrous Metals Society of China,2011,21:1199-1209.

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