A kind of aluminum alloy conductive wire core with high scandium content for cables and preparation method thereof

Abstract

The invention discloses an aluminum alloy conducting wire core with a high scandium content for a cable and a preparation method thereof. The conducting wire core comprises the following components by mass percent: 0.4% to 0.8% of Sc, 0.01% to 0.1% of Fe, 0.01% to 0.1% of cerium-rich rare earth and the balance of aluminum. The method comprises the following steps: adding an aluminum ingot into a shaft furnace; adding ferrum-aluminum intermediate alloy, cerium-rich rare earth intermediate alloy and scandium-aluminum intermediate alloy at the temperature of 750 to 780 DEG C to be smelted; refining, purifying, degassing and slagging off a melting body; and continuously casting and rolling the melting body to form the alloy. The conductivity of the prepared aluminum alloy conducting wire core is greater than or equal to 60.4% of IACS (International Annealed Copper Standard), wherein the tension-resisting strength of a hard alloy wire is greater than 240 MPa, and the elongation is greater than 30% and the yield limit is from 100 MP to 116 MPa. Thus, the hard alloy wire can be drawn to form an alloy wire of 0.3mm or a finer alloy wire.

Description

1. Technical field [0001] The invention belongs to the field of electric wire and cable industry, and in particular relates to an aluminum alloy material with a high Sc content conductive core for cables and a manufacturing method thereof. 2. Background technology [0002] In my country, the main component of wires used as transmission lines is copper, accounting for about 70% of the total amount of copper used. However, my country's copper resources are very short. With the depletion of China's copper mine resources, 80% of China's copper mines need to be imported, which is highly dependent. With the rising price of copper, using aluminum to save copper is an inevitable trend in the development of wire and cable. More than 80% of the wires and cables in France are aluminum conductors, and the aluminum conductors in Japan also account for more than 50%. my country's aluminum resources are very rich, but the application amount is less than 1%, mainly due to the immaturity o...

AI Technical Summary

Problems solved by technology

[0003] In the past, pure aluminum used as a wire and cable conductor had many shortcomings, and it was rarely used for insulating cores. It was even more difficult to draw thinner wires for wiring, magnet wires, and communication cables.

Since the strength and elongation of aluminum cannot meet the requirements, aluminum alloys at home and abroad are basically used as overhead wires, and are rarely used to prepare insulated wire cores.

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