Al-4.5Cu-3.5Zn-0.5Mg铸造铝合金的均匀化工艺及组织演变

doi:10.13251/j.issn.0254-6051.2020.01.035

金属热处理 ›› 2020, Vol. 45 ›› Issue (1): 174-180.DOI: 10.13251/j.issn.0254-6051.2020.01.035

Al-4.5Cu-3.5Zn-0.5Mg铸造铝合金的均匀化工艺及组织演变

王南海, 易丹青, 王海生, 成勇

中南大学材料科学与工程学院, 湖南长沙 410083

收稿日期:2019-06-22 出版日期:2020-01-25 发布日期:2020-04-03
通讯作者: 易丹青,教授,博士,主要从事轻合金和金属间化合物的制备、组织结构与性能研究,联系电话:13974870106,E-mail:Danqing@csu.edu.cn
作者简介:王南海(1994—),男,硕士研究生,主要从事高强韧铸造铝合金研究,联系电话:17308416724,E-mail:wang_nanhai@126.com。

Homogenization process and microstructure evolution of Al-4.5Cu-3.5Zn-0.5Mg as-cast alloy

Wang Nanhai, Yi Danqing, Wang Haisheng, Cheng Yong

School of Materials Science and Engineering, Central South University, Changsha Hunan 410083, China

Received:2019-06-22 Online:2020-01-25 Published:2020-04-03

摘要/Abstract

摘要： 对Al-4.5Cu-3.5Zn-0.5Mg铸态合金进行不同双级均匀化处理,采用扫描电镜、电子探针显微分析仪、差示扫描量热仪和光学显微镜等,研究了该合金的铸态组织及其在均匀化过程中的组织演变。结果表明:铸态组织主要由α-Al、粗大Al₂Cu相以及少量AlZnMgCu、Al₇Cu₂Fe相组成,合金元素枝晶偏析严重。经470 ℃×12 h均匀化处理后,AlZnMgCu相已基本回溶至基体;第二级均匀化温度由490 ℃逐渐升高到520 ℃或者延长保温时间,Al₂Cu相逐渐回溶至基体,合金元素分布趋于均匀。合金过烧温度为520 ℃,最佳双级均匀化制度为470 ℃×12 h+510 ℃×32 h,该制度与均匀化动力学计算结果基本一致。

关键词: Al-4.5Cu-3.5Zn-0.5Mg合金, 双级均匀化, 微观结构

Abstract: The microstructure of an as-cast Al-4.5Cu-3.5Zn-0.5Mg alloy and its evolution during different two-step homogenization treatments were studied by means of scanning electron microscope (SEM), electron probe micro-analyzer (EPMA), differential scanning calorimeter (DSC) and optical microscope (OM). The results show that the as-cast microstructure is mainly composed of α-Al and coarse Al ₂ Cu phase with a small amount of AlZnMgCu and Al ₇ Cu ₂ Fe phases, and severe dendritic segregation of alloying elements exists in the alloy ingot. After homogenized at 470 ℃ for 12 h, the AlZnMgCu phase is mainly dissolved into the matrix. The Al ₂ Cu phase is gradually dissolved into the matrix by increasing the second-step homogenization temperature from 490 ℃ to 520 ℃ or prolonging the holding time, and all the alloying elements tend to be homogenized. The over burnt temperature of the alloy is 520 ℃, and the proper homogenization process is 470 ℃×12 h+510 ℃×32 h, which agrees well with the kinetic calculation results of homogenization.

Key words: Al-4.5Cu-3.5Zn-0.5Mg alloy, two-step homogenization, microstructure

中图分类号:

TG146.2

王南海, 易丹青, 王海生, 成勇. Al-4.5Cu-3.5Zn-0.5Mg铸造铝合金的均匀化工艺及组织演变[J]. 金属热处理, 2020, 45(1): 174-180.

Wang Nanhai, Yi Danqing, Wang Haisheng, Cheng Yong. Homogenization process and microstructure evolution of Al-4.5Cu-3.5Zn-0.5Mg as-cast alloy[J]. HTM, 2020, 45(1): 174-180.

参考文献

[1]Liu X Y, Pan Q L, Lu C G, et al. Microstructure and mechanical properties of Al-Cu-Mg-Mn-Zr alloy with trace amounts of Ag[J]. Materials Science and Engineering A, 2009, 525(1/2): 128-132.
[2]Fan L, Hao Q T, Han W K. Dual characteristic of trace rare earth elements in a commercial casting Al-Cu-X alloy[J]. Rare Metals, 2015, 34(5): 308-313.
[3]Yao D, Xia Y, Qiu F, et al. Effects of La addition on the elevated temperature properties of the casting Al-Cu alloy[J]. Materials Science and Engineering A, 2011, 528(3): 1463-1466.
[4]Kaufman J G, Rooy E L. Aluminum Alloy Castings: Properties, Processes, and Applications[M]. ASM International, 2004.
[5]王华, 赵奇, 尹红霞. 微量Ce对Al-Cu-Li合金显微组织与力学性能的影响[J]. 金属热处理, 2016, 41(7): 63-65.
Wang Hua, Zhao Qi, Yin Hongxia. Effect of trace Ce on microstructure and mechanical properties of Al-Cu-Li alloy[J]. Heat Treatment of Metals, 2016, 41(7): 63-65.
[6]中南大学. 一种可热处理强化的高强高韧铸造铝合金及制备方法: 中国, CN201611247166. 9[P]. 2017-05-31.
[7]Wang H, Jiang B, Zhang J, et al. The precipitation behavior and mechanical properties of cast Al-4.5Cu-3.5Zn-0.5Mg alloy[J]. Journal of Alloys and Compounds, 2018, 768: 707-713.
[8]Li H Z, Ou Y J, Liao H J, et al. Microstructural evolution of high purity Al-Cu-Mg alloy during homogenization[J]. Materials Science Forum, 2014, 788: 208-214.
[9]Jia M, Zheng Z, Gong Z. Microstructure evolution of the 1469 Al-Cu-Li-Sc alloy during homogenization[J]. Journal of Alloys and Compounds, 2014, 614: 131-139.
[10]黄元春, 杨楚戈, 刘宇, 等. 2219 铝合金铸锭均匀化热处理工艺[J]. 金属热处理, 2016, 41(12): 92-97.
Huang Yuanchun, Yang Chuge, Liu Yu, et al. Homogenization heat treatment of 2219 aluminum alloy ingots[J]. Heat Treatment of Metals, 2016, 41(12): 92-97.
[11]Liu X Y, Pan Q L, Fan X, et al. Microstructural evolution of Al-Cu-Mg-Ag alloy during homogenization[J]. Journal of Alloys and Compounds, 2009, 484(1/2): 790-794.
[12]潘康观, 尹登峰, 余鑫祥, 等. Al-Cu-Mg-Ag-Sc-Zr 合金的均匀化工艺[J]. 金属热处理, 2017, 42(5): 117-121.
Pan Kangguan, Yin Dengfeng, Yu Xinxiang, et al. Homogenization process of Al-Cu-Mg-Ag-Sc-Zr alloy[J]. Heat Treatment of Metals, 2017, 42(5): 117-121.
[13]Akopyan T K, Zolotorevskii V S, Khvan A V. Calculation of phase diagrams of systems Al-Cu-Zn-Mg and Al-Cu-Zn-Mg-Fe-Si[J]. Russian Journal of Non-Ferrous Metals, 2013, 54(4): 307-313.
[14]Liu Y, Jiang D, Xie W, et al. Solidification phases and their evolution during homogenization of a DC cast Al-8.35Zn-2.5Mg-2.25Cu alloy[J]. Materials Characterization, 2014, 93: 173-183.
[15]Du Y, Chang Y A, Huang B, et al. Diffusion coefficients of some solutes in fcc and liquid Al: Critical evaluation and correlation[J]. Materials Science and Engineering A, 2003, 363(1/2): 140-151.

Al-4.5Cu-3.5Zn-0.5Mg铸造铝合金的均匀化工艺及组织演变

Homogenization process and microstructure evolution of Al-4.5Cu-3.5Zn-0.5Mg as-cast alloy

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 14

编辑推荐

Metrics

本文评价

[1]	何利军, 周龙, 汤淳坡, 郭小钢, 金晓, 赵彦芬, 薛飞, 张国栋. 长时服役后T92钢管的微观组织及力学性能变化[J]. 金属热处理, 2021, 46(7): 31-36.
[2]	魏娜莎, 原瑞泽, 牛雪梅, 陈志岗, 陈峙, 闫献国. 深冷处理对35MnB合金钢残余应力的调控机理[J]. 金属热处理, 2021, 46(5): 104-110.
[3]	李小红, 姜庆伟, 李敏, 杨鹏. 亚稳态ARB-Cu的微观结构与力学行为对退火工艺的响应关系[J]. 金属热处理, 2021, 46(2): 37-44.
[4]	陈梦园, 刘卓, 吴润, 吴腾. 配分时间对Q&P钢组织及性能的影响[J]. 金属热处理, 2020, 45(9): 62-65.
[5]	王文英, 王慧, 曲世永. 相变诱导塑性钢TRIP590的烘烤硬化特性[J]. 金属热处理, 2020, 45(8): 43-46.
[6]	崔静, 郭玉珠, 庞铭, 杨广峰. 超音速等离子喷涂ZrO₂涂层的缺陷分析与力学性能[J]. 金属热处理, 2020, 45(8): 216-221.
[7]	王明, 纪红, 卢硕. 金属间化合物Ni₃Al薄膜制备工艺[J]. 金属热处理, 2020, 45(5): 183-186.
[8]	范德良, 王志武, 袁廷碧. 非线性超声表征HR3C钢时效过程中析出相的变化[J]. 金属热处理, 2020, 45(2): 242-249.
[9]	王洪新，程振邦，宣亮，张昌春. 纳米相增强铜合金的强化机理[J]. 金属热处理, 2017, 42(2): 80-82.
[10]	张聪惠，朱珊珊，王耀勉，宋薇. 退火对表面机械研磨处理工业纯锆显微组织和残余应力的影响[J]. 金属热处理, 2017, 42(2): 155-159.
[11]	段晋辉1, 3，梁银1, 3，裴旺1, 3，杨喜昆2. 不同碳含量掺杂对多弧离子镀CrN涂层摩擦学性能的影响[J]. 金属热处理, 2016, 41(1): 139-144.
[12]	王凯亮1,2，孙勇1,2，郭中正1,2，段永华1,2，孙国琪1,2. 磁控共溅射沉积Al-Al₂O₃复合膜的结构与性能[J]. 金属热处理, 2016, 41(1): 184-189.
[13]	王甲安，石岩，张锦文. 定向凝固下Mg-1.5Gd合金的微观结构与微观偏析[J]. 金属热处理, 2015, 40(7): 115-120.
[14]	葛源, 陈康敏, 张青来, 蒋珍, 雷亚军, 曹继敏. 矫直温度对Ti-50.8Ni超弹性丝材相变行为及力学性能的影响[J]. 金属热处理, 2014, 39(12): 7-12.