Copper-clad aluminum-magnesium alloy wire

Abstract

The present invention discloses a copper-clad aluminum-magnesium alloy wire. The copper-clad aluminum-magnesium alloy wire comprises an aluminum-magnesium alloy wire located at the center and a copper layer closely coating the outer surface of the aluminum-magnesium alloy wire. The volume of the copper layer is 10% to 20% of that of the aluminum-magnesium alloy wire. The thickness of the copper layer is 3.8% to 8.2% of the radius of the aluminum-magnesium alloy wire. The aluminum-magnesium alloy wire comprises the following components of: 0.01 to 0.05wt% of Si; 0.05 to 0.15wt% of Fe; 0.04 to 0.10 wt% of Mn; 0.85 to 1.00 wt% of Mg; 0.02 to 0.08 wt% of Cr; and the balance is Al. The copper-clad aluminum-magnesium alloy wire is obtained by through adopting the following steps that: aluminum ingots of which the name number is Al99.7 are put into a shaft furnace, so that the aluminum ingots can be molten in the shaft furnace; when the furnace is filled with the molten aluminum, one-time slagging off is performed; when the temperature of the molten aluminum reaches 780 DEG C, the molten aluminum is transferred to a holding furnace; when the molten aluminum is poured into the holding furnace, aluminum-boron alloy is added into the holding furnace; and after the holding furnace is filled with the molten aluminum, aluminum-chromium alloy, aluminum-manganese alloy and magnesium ingots are sequentially added into the holding furnace. The tensile strength of the copper-clad aluminum-magnesium alloy wire of the invention can reach 190 to 220 MPa; the elongation of the copper-clad aluminum-magnesium alloy wire can be 10% or above; and the resistivity of the copper-clad aluminum-magnesium alloy wire is smaller than 0.034 ohm.m / m<2>.

Description

technical field [0001] The invention relates to an Al-Mg alloy rod, in particular to a copper-clad aluminum-magnesium alloy wire. Background technique [0002] Due to the characteristics of low density, high strength and good plasticity, aluminum alloys are widely used in automobiles, ships, aerospace and other fields. With the development of science and technology and the guidance of policies, there is an upsurge of "using aluminum to save copper" in the power and signal transmission sectors, which further broadens the application fields of aluminum alloys. [0003] Copper-clad aluminum-magnesium alloy wire combines the excellent electrical conductivity of copper with the advantages of light weight and good shielding performance of aluminum-magnesium alloy wire. It is widely used in the shielding wire of cable television coaxial cables, large-capacity communication network signal cables, and control signal cables. Copper-clad aluminum-magnesium wire uses aluminum-magnesium...

AI Technical Summary

Problems solved by technology

At present, there are some manufacturers in the market that produce aluminum-magnesium alloy rods, most of which use lead rods to produce. This process is simple and the processing cost is low, but the product quality is poor in consistency and contains a large amount of gas and slag; there are also some manufacturers that use domestic continuous casting and rolling. Production, low production capacity, fluctuating product performance

[0005] At present, the quality consistency of aluminum-magnesium alloy rods produced in the market is poor, including large gas and slag content in alloy rods, and large performance fluctuations, which lead to aluminum exposure and high wire breakage in the process of drawing filaments.

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