Conductive property of Al-Er-Cu alloy for overhead wire

doi:10.13251/j.issn.0254-6051.2021.05.025

Abstract

Abstract: Properties change rule of the Al-Er-Cu alloy during aging was studied via electrical conductivity and hardness testing. The precipitation and growth law of the precipitated phase in the alloy were observed by means of TEM and EDS. The results show that with the increase of aging temperature, both electrical conductivity and hardness peaks of the same alloy appear earlier on the whole. When aged at 300 ℃, there are a lot of dispersed nano-precipitates in the Al-Er-0.22Cu alloy, and the precipitated phases reinforce the alloy strength and enhance the electrical conductivity. When aged for 2 h, the electrical conductivity reaches the peak value of 60.15%IACS and the hardness peak of 43.1 HV0.05 achieves when aged for 10 h, so the Al-Er-0.22Cu alloy has both high electrical conductivity and good hardness.

Key words: Al-Er-Cu alloy, electrical conductivity, aging, dispersed phase, precipitation strengthening

CLC Number:

TN604

Ma Xiaojie, Liu Lining, Chen Xiangguang, Zang Wei. Conductive property of Al-Er-Cu alloy for overhead wire[J]. Heat Treatment of Metals, 2021, 46(5): 156-159.

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