退火态工业纯铝导线强度-导电率关系演变规律
Evolution Law of Strength-conductivity Relation of Annealed Industrial Pure Aluminum Wire
摘 要
架空导线在长时间长距离输送电力过程中，其性能会因自身电阻产生的热效应而发生变化。在不同温度下对架空输电导线用工业纯铝线进行退火处理以模拟其服役状态，研究了退火态铝线屈服强度-导电率关系演变规律，并与拉拔态工业纯铝线的进行了对比。结果表明：退火态与拉拔态工业纯铝导线的屈服强度和导电率之间均成反比关系；退火态工业纯铝线屈服强度-导电率曲线位于拉拔态工业纯铝线的上方；退火过程中形成的平衡态大角晶界是工业纯铝线高强度、高导电率的主要原因。
退火
屈服强度
导电率
晶界
industrial pure aluminum wire
annealing
yield strength
conductivity
grain boundary
Abstract
The performance of overhead conductors will change due to thermal effect caused by self-resistance in the long-term and long-distance transmission of electricity. The industrial pure aluminum wires for overhead transmission lines were annealed at different temperatures to simulate the service states and the yield strength-conductivity relation of them were presented compared with that of the drawn industrial pure aluminum wires. The results show that yield strength was in inverse ratio to conductivity of both annealed and drawn industrial pure aluminum wires. The yield strength-conductivity curves of annealed industrial pure aluminum wires were all above that of drawn state samples, the equilibrium high-angle grain boundary formed after annealing was the main reason leading to high strength and high conductivity of industrial pure aluminum wires.
中图分类号 TG146.2 DOI 10.11973/lhjy-wl201910003
所属栏目 试验与研究
基金项目 国家电网项目（5211HD180007）
收稿日期 2019/1/31
修改稿日期
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备注陈庆吟(1983-),女,工程师,主要从事电力器材质量检测与研究工作,4493056@qq.com
引用该论文: CHEN Qingyin,LIU Hanzhong,LI Rui,HOU Jiapeng,YU Hongyun,WANG Qiang,WANG Lifeng. Evolution Law of Strength-conductivity Relation of Annealed Industrial Pure Aluminum Wire[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2019, 55(10): 680～685
陈庆吟,刘瀚钟,李瑞,侯嘉鹏,余虹云,王强,汪立锋. 退火态工业纯铝导线强度-导电率关系演变规律[J]. 理化检验－物理分册, 2019, 55(10): 680～685
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【3】张旭,赵景峰,李轶文,等. 输电线用钢芯铝绞线的腐蚀原因分析[J]. 理化检验(物理分册),2016,52(7):484-488.
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【5】MURASHKIN M Y, SABIROV I, SAUVAGE X, et al. Nanostructured Al and Cu alloys with superior strength and electrical conductivity[J]. Journal of Materials Science, 2016, 51(1):33-49.
【6】MIYAKE J, FINE M E. Electrical conductivity versus strength in a precipitation hardened alloy[J]. Acta Metallurgica et Materialia,1992,40(4):733-741.
【7】HOU J P, LI R, WANG Q, et al. Breaking the trade-off relation of strength and electrical conductivity in pure Al wire by controlling texture and grain boundary[J].Journal of Alloys and Compounds,2018,769:96-109.
【8】HOU J P, CHEN Q Y, WANG Q, et al. Effects of annealing treatment on the microstructure evolution and the strength degradation behavior of the commercially pure Al conductor[J]. Materials Science and Engineering:A,2017,707:511-517.
【9】ZHU Y K, CHEN Q Y, WANG Q, et al. Effect of stress profile on microstructure evolution of cold-drawn commercially pure aluminum wire analyzed by finite element simulation[J].Journal of Materials Science & Technology,2018,34(7):1214-1221.
【10】ASGHARZADEH H, SIMCHI A, KIM H S. Microstructural features, texture and strengthening mechanisms of nanostructured AA6063 alloy processed by powder metallurgy[J].Materials Science and Engineering:A,2011,528(12):3981-3989.
【11】ASGHARZADEH H, SIMCHI A, KIM H S. Microstructure and mechanical properties of oxide-dispersion strengthened Al6063 alloy with ultra-fine grain structure[J]. Metallurgical and Materials Transactions A,2011,42(3):816-824.
【12】TOPPING T D, AHN B, LI Y, et al. Influence of process parameters on the mechanical behavior of an ultrafine-grained Al alloy[J]. Metallurgical and Materials Transactions A,2012,43(2):505-519.
【13】ZHANG Z F, WANG Z G. Effects of grain boundaries on cyclic deformation behavior of copper bicrystals and columnar crystals[J]. Acta Materialia,1998,46(14):5063-5072.
【14】ZHANG Z F, WANG Z G. Cyclic deformation features of a copper bicrystal with an embedded grain and surrounding grain boundary[J].Materials Science and Engineering:A,1999,271(1/2):449-457.
【15】ZHANG Z F, WANG Z G. Grain boundary effects on cyclic deformation and fatigue damage[J]. Progress in Materials Science,2008,53(7):1025-1099.
【16】ESTRIN Y, TÓTH L S, MOLINARI A, et al. A dislocation-based model for all hardening stages in large strain deformation[J]. Acta Materialia,1998,46(15):5509-5522.
【17】SAUVAGE X, BOBRUK E V, MURASHKIN M Y, et al. Optimization of electrical conductivity and strength combination by structure design at the nanoscale in Al-Mg-Si alloys[J]. Acta Materialia,2015,98:355-366.
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