方振邦,王若民,李宸宇,缪春辉,滕越,陈国宏,汤文明.时效对高导耐热铝合金导线第二相析出及其性能的影响[J].装备环境工程,2022,19(6):120-126. FANG Zhen-bang,WANG Ruo-min,LI Chen-yu,MIAO Chun-hui,TENG Yue,CHEN Guo-hong,TANG Wen-ming.Effects of Aging on Secondary-phase Precipitation and Properties of High-conductivity Heat-resistant Al Alloy Conductor Wire[J].Equipment Environmental Engineering,2022,19(6):120-126.
时效对高导耐热铝合金导线第二相析出及其性能的影响
Effects of Aging on Secondary-phase Precipitation and Properties of High-conductivity Heat-resistant Al Alloy Conductor Wire
  
DOI:10.7643/issn.1672-9242.2022.06.017
中文关键词:  耐热铝合金导线  人工时效  第二相  电导率  拉伸力学性能  断口形貌中图分类号:TG166.3 文献标识码:A 文章编号:1672-9242(2022)06-0120-07
英文关键词:heat-resistant Al alloy conductor wire  artificial aging  secondary phase  conductivity  tensile mechanical property  fractography
基金项目:国家电网有限公司总部科技项目(5500-202028257A-0-0-00)
作者单位
方振邦 国网安徽省电力有限公司电力科学研究院,合肥 230601 
王若民 国网安徽省电力有限公司电力科学研究院,合肥 230601;安徽新力电业科技咨询有限责任公司,合肥 230026 
李宸宇 合肥工业大学 材料科学与工程学院,合肥 230009 
缪春辉 国网安徽省电力有限公司电力科学研究院,合肥 230601 
滕越 国网安徽省电力有限公司电力科学研究院,合肥 230601 
陈国宏 国网安徽省电力有限公司电力科学研究院,合肥 230601 
汤文明 合肥工业大学 材料科学与工程学院,合肥 230009 
AuthorInstitution
FANG Zhen-bang Electric Power Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230601, China 
WANG Ruo-min Electric Power Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230601, China;Anhui Xinli Power Technology Consulting Co., Ltd., Hefei 230026, China 
LI Chen-yu School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 
MIAO Chun-hui Electric Power Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230601, China 
TENG Yue Electric Power Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230601, China 
CHEN Guo-hong Electric Power Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230601, China 
TANG Wen-ming School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 
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中文摘要:
      目的 开展时效过程中61.5%IACS高导耐热铝合金导线析出第二相特性及其电导率与拉伸力学性能变化规律的研究,评价其热稳定性。方法 经过150~230 ℃长达630 h时效,揭示第二相的组成、形态与分布及其对时效态铝合金导线电导率与拉伸力学性能的影响规律。结果 时效态铝合金导线中,颗粒状及针状A13Zr(Y, Er)、A13(Zr(Y)xErl‒x)第二相在Al晶内、晶界析出,A13Fe相颗粒弥散分布于Al晶界。伴随着时效过程,铝合金导线的抗拉强度与伸长率先上升、再逐渐下降;同时,铝合金导线的电导率先增大、后逐渐趋于稳定。该趋势随时效温度的升高而越加明显。结论 第二相的析出、长大是影响时效态铝合金导线力学性能及电导率的主要原因。经230 ℃、1 h时效,铝合金导线的强度保持率高达94%,满足GB/T 30551—2014的要求。所有时效态铝合金导线的电导率均高于其初始值,该高导耐热铝合金导线的热稳定性良好。
英文摘要:
      The precipitation characteristic of the secondary-phases, and the change law of the conductivity and tensile mechanical properties were researched to evaluate the thermal stability of the 61.5% IACS high-conductivity heat-resistant Al alloy conductor wire. After aging at temperature range from 150 ℃ to 230 ℃ for 630 h, the composition, morphology and distribution of the secondary phases was detected, and its effect on the conductivity and tensile mechanical properties of the aging Al alloy conductor wire were revealed. As for aging Al alloy conductor wire, granular and needle-like secondary phases of A13Zr(Y, Er) and A13(Zr(Y)xErl‒x) are distributed in the Al grains and along the Al grain boundaries, and also the Al3Fe particles are distributed dispersively along the Al grain boundaries. During aging, the tensile strength and elongation of the wire initially increase, and then gradually decrease. Meanwhile, the conductivity of the wire initially increases, and then remains stable. Such trends become more obvious as increasing the aging temperature. The evolution of the mechanical properties and conductivity of the aging wire mainly results from the precipitation and growth of the secondary phases. After aging at 230 ℃ for 1 h, the strength retention rate of the Al alloy conductor wire is as high as 94%, meeting the requirement of GB/T 30551‒2014. The conductivity of the wire in all aging conditions is superior to the initial value of the wire. Therefore, it is indicated that the high-conductivity heat-resistant Al alloy conductor wire has a high thermal stability.
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