Aluminium alloy conductor for automotive wires and manufacturing method thereof

Abstract

The invention discloses an aluminium alloy conductor for automotive wires, which has the advantages of high heat resistance, conductivity, tensile strength, extensibility and fatigue resistance, and a manufacturing method thereof. The alloy contains 0.3 to 0.8 weight percent of iron, 0.05 to 0.20 percent of silicon, 0.1 to 0.5 weight percent of magnesium, 0.1 to 0.3 weight percent of copper, 0.001 to 0.04 weight percent of boron, 0.001 to 0.04 weight percent of zirconium, 0.001 to 0.04 weight percent of yttrium, and the balance of aluminium and inevitable impurities, wherein one or two elements, except the aluminium and the inevitable impurities, account for 0.1 to 2.0 weight percent. The manufacturing method comprises the following steps of: adding the iron, silicon, magnesium, copper, boron, zirconium, yttrium and aluminium into a smelting furnace; smelting, and casting and rolling; performing intermediate annealing treatment; drawing into aluminium alloy filaments with the diameterof 0.5mm; and stranding into wire cores, and performing annealing treatment. The conductor prepared by the method has the tensile strength of 210MPa and above, the elongation at break of over 10 percent, the conductivity of over 58 percent, and excellent heat resistance and flexibility.

Description

technical field [0001] The invention relates to an aluminum alloy conductor and a manufacturing method thereof, in particular to an aluminum alloy conductor for automobile wires and a manufacturing method thereof. Background technique [0002] At present, due to the shortage of copper resources and the high price of copper, the fields related to the use of copper will be greatly affected, including the automotive field. With the substantial improvement of the performance and functions of automobiles, the wiring harnesses for automobiles are also increasing. Today, the wiring harnesses for automobiles basically use copper conductors, and very few use copper-clad aluminum or aluminum alloys, but in There are very few in China, and foreign countries have done more in-depth research in this area. [0003] Copper is the most ideal choice for automobile wiring harness conductors. As the competition in the automobile industry becomes more and more fierce, people work hard on autom...

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Problems solved by technology

[0004] Chinese patent CN 101017712A copper-clad aluminum-magnesium alloy wire in the application of automobile wiring harness, although the cost and weight of the automobile can be reduced by using this alloy, but due to the complicated preparation process and immature technology, it is difficult to promote it on a large scale, and the market prospect Not very good

Automobile wiring harness requires very good flexibility, so the wire diameter of the monofilament is required to be as thin as possible, but due to the low strength and low elongation of pure aluminum, it is difficult to draw it very thin, especially when the diameter of the monofilament is drawn to 1.0 It is basically difficult to reach 0.5mm, and aluminum has poor fatigue resistance and bending performance as a conductor

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