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Al-Cu-Mn system ALTEK alloys represent a high-potential group of wrought aluminum alloys that do not require homogenization. A unique two-phase structure is formed at 1–3% and 1–2% respective copper and manganese contents. The key feature of these alloys is the formation of nano-sized Al20Cu2Mn3 phase particles at temperatures of 300 °C or higher, ensuring high thermal stability and strength at elevated temperatures. This study addresses the prospects of applying Al-Cu-Mn (ALTEK) system alloys for overhead power line wire production. The technology for wire production from a 2Cu2Mn alloy using sectional rolling and drawing, with a total reduction of 39%, has been developed. The effects of deformation and heat treatment (3 h at 300–500 °C) on the macrostructure, as well as the electrical and mechanical properties of the material, have been studied. The originally selected process practice did not result in an adequate number of Al20Cu2Mn3 particles to sufficiently inhibit recovery and recrystallization processes. The practice has been revised to account for the specific features of wire properties formation. The alloy’s specific electrical conductivity reached 28.3 MS/m after a 3-h annealing at 400 °C.

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Study of Microstructure and Physical-Mechanical Properties Formation During Al2Cu2Mn Alloy Wire Production by Sectional Rolling and Drawing

  • 会议论文

  • 发表日期：

    2025年

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  • S. V. Konovalov,
  • E. V. Aryshenskii,
  • A. A. Levagina

摘要

Al-Cu-Mn system ALTEK alloys represent a high-potential group of wrought aluminum alloys that do not require homogenization. A unique two-phase structure is formed at 1–3% and 1–2% respective copper and manganese contents. The key feature of these alloys is the formation of nano-sized Al20Cu2Mn3 phase particles at temperatures of 300 °C or higher, ensuring high thermal stability and strength at elevated temperatures. This study addresses the prospects of applying Al-Cu-Mn (ALTEK) system alloys for overhead power line wire production. The technology for wire production from a 2Cu2Mn alloy using sectional rolling and drawing, with a total reduction of 39%, has been developed. The effects of deformation and heat treatment (3 h at 300–500 °C) on the macrostructure, as well as the electrical and mechanical properties of the material, have been studied. The originally selected process practice did not result in an adequate number of Al20Cu2Mn3 particles to sufficiently inhibit recovery and recrystallization processes. The practice has been revised to account for the specific features of wire properties formation. The alloy’s specific electrical conductivity reached 28.3 MS/m after a 3-h annealing at 400 °C.