Study on the Ageing Process of the 6xxx Series Aluminum Alloy Wires for Overhead Conductors

Abstract:

The 6xxx series aluminium alloy wires (with the diameters of 2.84 mm) produced by the continuous drawing and rotary-wheel continuous casting, were directly aged in different conditions. The results show that, when ageing temperature is at 150°C, the tensile strength of the wire firstly decreased from 283 MPa to 265 MPa as the ageing time extended from 0 to 4 hours, and then increased from 265 MPa to 270 MPa as the ageing time extended from 4 to 12 hours, and finally decreased from 270 MPa 263 MPa as the ageing time extended from 12 to 24 hours. The electrical resistively of the wires continued decreases with the ageing time extend from 0 to 24 hours. When the ageing temperature is at 160, 170, 180 and 190 °C, both the tensile strength and the electrical resistively of the wire continuously decreased with the ageing time extended from 0 to 24 hours. When the ageing time was identical, the wires with higher ageing temperature possessed lower tensile strength and electrical resistively.

• Periodical: Materials Science Forum (Volume 877)
• Pages: 347-355
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.877.347
• Online since: November 2016
• Authors: Zhi Hao Zhao*, Qing Qiang Chen, Qing Feng Zhu, Wen Qiang Liu, Gao Song Wang
• Keywords: 6xxx Series Aluminium Alloy, Aging Treatment, Overhead Conductors, Tensile Strength

References

[1] T.Z. Wang, R.Z. Wu, J.H. Zhang, et al. Development of aluminum conductive materials, J. Materials Science & Technology. 22(06) (2014) 53-61.

[2] Z.Q. Huang, Application and Prospect of aluminum and aluminum alloy used in electric cable industry, J. Electic Wire &Cable. (2) (2013) 4-9.

[3] D. Chen, C.D. Li, X.D. Zhao, Research and application of aluminum alloy in the field of power transmission, J. Materials Review. (15) (2013) 145-148.

[4] R.Y. Zhang, X.Y. Zhao, M. Li, et al. Polarization and application of the new-type energy-saving conductors in transmission lines, Electric Power Construction. (06) (2012) 89-92.

[5] H.S. Ye, Application of moderate-strength all aluminum alloy conductor in transmission lines j. Electric Power Construction. 31(12) (2010) 14-19.

[6] S. Karabay, F.K. önder, An approach for analysis in refurbishment of existing conventional HV–ACSR transmission lines with AAAC J, Electric Power Systems Research. 72(2) (2004) 179-185.

DOI: 10.1016/j.epsr.2004.03.014

[7] S. Karabay, Influence of AlB 2 compound on elimination of incoherent precipitation in artificial aging of wires drawn from redraw rod extruded from billets cast of alloy AA-6101 by vertical direct chill casting J, Materials and Design. 29(7) (2007).

DOI: 10.1016/j.matdes.2007.06.004

[8] Z.X. Liu, Investigation on aging treatment of 6101 aluminium alloy D, Chang Sha: Central South University. (2013).

[9] Y. Sun, Effect of heat treatment on Microstructure and mechanical properties of 6082/6063 alloys D, Chang Sha: Central South University. (2012).

[10] H. Li, D.Z. Pan, Z.X. Wang, et al. Influence of T616 temper on tensile and intergranular corrosion properties of 6061 aluminum alloy J, Acta Metallurgica Sinica. (04) (2010) 494-499.

DOI: 10.3724/sp.j.1037.2010.00494

[11] J.A. Liu, Properties of natural aging and artificial aging of al-mg-si extrusion alloy J, The Chinese Journal of Nonferrous Metals. 8(1) (1998) 257-260.

[12] M.J. Wang, J.L. Wang, Study on Aging Treatments of 6063 Al-alloy J, Heat Treatment of Metals. (08) (1998) 26-43.

[13] G. Das, M. Das, S. Ghosh, et al. Effect of aging on mechanical properties of 6063 Al-alloy using instrumented ball indentation technique J, Materials Science & Engineering A. 527 (6) (2009)1590-1594.

DOI: 10.1016/j.msea.2009.10.037

[14] A. Gaber, M.A. Gaffar, M.S. Mostafa, et al. Precipitation kinetics of Al–1. 12 Mg2Si–0. 35 Si and Al–1. 07 Mg2Si–0. 33 Cu alloys J. Journal of Alloys and Compounds. 429(1-2) (2007) 167-175.

DOI: 10.1016/j.jallcom.2006.04.021

[15] Q.Q. Chen, Z.H. Zhao, Q.F. Zhu, et al. The effect of different strengthening mechanism on the hardness of 6201 aluminum alloy during heat treatment process J, Transactions of Materials and Heat Treatment. 2015, under review.

[16] X. Fang, M. Song, K. Li, et al. Precipitation sequence of an aged Al-Mg-Si alloy J. Journal of Mining and Metallurgy, Section B: Metallurgy. 46(2) (2010) 1895-(1902).

DOI: 10.2298/jmmb1002171f

[17] S. Esmaeili, X. Wang, D.J. Lloyd, et al. On the precipitation-hardening behavior of the Al-Mg-Si-Cu alloy AA6111 J, Metallurgical and Materials Transactions A. 34(3) (2003) 751-763.

DOI: 10.1007/s11661-003-0110-4

[18] L. Zhen, W.D. Fei, S.B. Kang, et al. Precipitation behaviour of Al-Mg-Si alloys with high silicon content J, Journal of Materials Science. 32(7) (1997) 171-172.

[19] G.B. Burger, A.K. Gupta, P.W. Jeffrey, et al. Microstructural control of aluminum sheet used in automotive applications J, Materials Characterization. 35(1) (1995) 23-39.

DOI: 10.1016/1044-5803(95)00065-8

[20] M. Yang. Study on microstructure and properties of 6061 aluminium alloy after stress aging D, Qin Huangdao: Yanshan University, (2012).