A method for manufacturing aluminum alloy wire and aluminum stranded wire

By optimizing the composition and process of aluminum alloy wire, the problem of reduced strength when increasing conductivity of aluminum alloy wire was solved, and aluminum alloy wire with high conductivity and high strength was produced, thus reducing the loss of transmission lines.

CN115870364BActive Publication Date: 2026-06-30GUANGDONG POWER GRID CO LTD +1
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Patent Information

Application Number
CN202211699560.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-28
Publication Date
2026-06-30
Estimated Expiration
2042-12-28

AI Technical Summary

Technical Problem

The existing aluminum alloy wires suffer from reduced strength during the process of improving conductivity, especially since TiB2 particles tend to aggregate and precipitate during the aluminum alloy casting process, leading to surface scratches, and the refining effect of the refining agent weakens over time.

Method used

The method for manufacturing aluminum alloy wire with specific composition includes optimizing the composition and process flow, removing Ti and B elements, controlling the content of lanthanum and cerium elements, and combining inert gas and electromagnetic purification technology for impurity removal. An ultrafine grain structure is formed by cumulative rolling, and the aging temperature and time are optimized.

Benefits of technology

Aluminum alloy wires with a single-wire tensile strength of 315MPa to 325MPa and a conductivity of 54% IACS were prepared. Compared with traditional aluminum alloy wires, these wires have higher conductivity, lower DC resistance, and lower hysteresis loss in AC environments, thus reducing the annual loss of transmission lines.

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Abstract

This application discloses a method for manufacturing aluminum alloy wire and aluminum stranded wire, relating to the field of aluminum alloy stranded wire manufacturing technology. The method involves selecting aluminum ingots, magnesium ingots, Al-20Si alloy, Al-20Cr alloy, Al-10V alloy, and lanthanum-cerium mixed rare earth elements as raw materials and smelting them to form an aluminum alloy melt; refining the aluminum alloy melt with inert gas and / or refining agents through in-furnace impurity removal; introducing the aluminum alloy melt into a flow channel integrated with an electromagnetic purification device for external online impurity removal; casting the aluminum alloy melt into an ingot plate, and repeatedly rolling the ingot plate a predetermined number of times using a cumulative rolling method to form an aluminum alloy rod, which is then continuously quenched; allowing the aluminum alloy rod to stand for a predetermined time before drawing it into an aluminum alloy wire, which is then aged to obtain the aluminum alloy wire. Through the above manufacturing method, aluminum alloy wire that meets single-wire tensile strength requirements and has higher conductivity can be prepared with fewer material components.
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