金属热处理 ›› 2020, Vol. 45 ›› Issue (2): 154-160.DOI: 10.13251/j.issn.0254-6051.2020.02.030

• 工艺研究 • 上一篇    下一篇

等温退火对8030铝合金导线组织性能的影响

韩茜1, 李英2, 庞华1, 李春1, 崔乐2, 王金力3, 刘彦峰1   

  1. 1. 商洛学院 化学工程与现代材料学院 陕西省尾矿资源综合利用重点实验室, 陕西 商洛 726000;
    2. 商洛学院 电子信息与电气工程学院, 陕西 商洛 726000;
    3. 陕西商洛市林强电线电缆有限公司, 陕西 商洛 726000
  • 收稿日期:2019-09-22 出版日期:2020-02-25 发布日期:2020-04-03
  • 作者简介:韩 茜(1988—),女,讲师,主要从事轻合金热处理强化研究,E-mail:haohi2010@qq.com。
  • 基金资助:

    商洛市科技计划项目(SK2016-29);商洛学院科学与技术研究基金(18SKY018);陕西省教育厅专项科研计划项目(18JK0244)

Effect of isothermal annealing on microstructure and properties of 8030 aluminum alloy wire

Han Xi1, Li Ying2, Pang Hua1, Li Chun1, Cui Le2, Wang Jinli3, Liu Yanfeng1   

  1. 1. Shaanxi Key Laboratory of Tailings Comprehensive Utilization of Resources, Department of Chemical Engineering and Modern Material, Shangluo University, Shangluo Shaanxi 726000, China;
    2. Department of Eleatronic Information and Eleatrical Engineering, Shangluo University, Shangluo Shaanxi 726000, China;
    3. Shaanxi Shangluo Linqiang Wire and Cable Co., Ltd., Shangluo Shaanxi 726000, China
  • Received:2019-09-22 Online:2020-02-25 Published:2020-04-03

摘要:

研究了不同等温退火工艺对8030铝合金导线组织及性能的影响。结果表明:等温退火前后合金均由α-Al基体和Al6Fe相组成。在同一等温温度下,随着等温时间的延长组织逐渐趋于均匀化;同一等温时间下,随着等温温度的升高,组织趋于均匀化的时间缩短。经过等温退火处理后铝合金导线的导电率均有所提高,在470 ℃均匀化退火24 h后再经240 ℃等温4 h,合金导电率达到最高值57.21%IACS,比未经热处理试样的导电率提高了2.4%IACS。经过等温退火处理后铝合金导线的硬度及抗拉强度均有所降低,塑性大幅度提高。在470 ℃均匀化退火24 h后再经260 ℃等温8 h,合金的伸长率最高可达23.64%。热处理前后合金均为塑性断裂。

关键词: 8030铝合金, 等温退火处理, 显微组织, 导电率, 力学性能

Abstract:

Effects of different isothermal annealing processes on the microstructure and properties of 8030 aluminum alloy wire were studied. The results show that the aluminum alloy wires are both composed of α-Al matrix and Al6Fe phase before and after the isothermal annealing. After the isothermal annealing, at the same isothermal temperature, the microstructure gradually becomes uniform with the extension of the isothermal time. Under the same isothermal time, as the isothermal temperature increases, the isothermal time at which the structure tends to be uniform is shortened. After isothermal annealing, the electrical conductivity of aluminum alloy wires is improved. After uniform annealing at 470 ℃ for 24 h and then at 240 ℃ for 4 h, the electrical conductivity of the alloy reaches the highest value of 57.21%IACS, which is 2.4%IACS higher than that of the untreated samples. After the isothermal annealing, the hardness and tensile strength of the aluminum alloy wire are reduced, but the plasticity is greatly improved. After annealing at 470 ℃ for 24 h and then isothermal treated at 260 ℃ for 8 h, the elongation of the alloy is up to 23.64 %. Before and after heat treatment, the alloys before and after heat treatment are both plastic fracture.

Key words: 8030 aluminum alloy, isothermal annealing treatment, microstructure, electrical conductivity, mechanical properties

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