High-strength and high-conductivity aluminum rod material and production method

Abstract

The invention discloses a high-strength and high-conductivity aluminum rod material and a production method. The aluminum rod material comprises the following alloy components in percentage by weight:0.16-0.19% of iron, 0.03-0.45% of silicon, 0.02-0.05% of boron, 0.02-0.2% of lanthanum, less than 0.01% of manganese chrome vanadium titanium, and the balance of aluminum, wherein the ratio of iron to silicon is controlled to 3.5-6. According to the produced high-strength and high-conductivity aluminum rod material, the main performance indexes meet the requirements of GB / T3954, namely, the tensile strength is 140 MPa or higher, the conductivity is 62.5% IACS, and the single-coil aluminum bar strength deviation is 4 MPa; the tensile strength of a large-section conductor aluminum wire producedthrough the aluminum bar is not less than 180 MPa, and the tensile strength difference is not greater than 20 MPa, the conductivity is 62.5% IACS; unnecessary energy consumption in an ultrahigh voltage power transmission process is eliminated.

Description

technical field [0001] The invention relates to the technical field of aluminum wire production, and more specifically relates to a high-strength electrical conductivity aluminum rod material and a production method. Background technique [0002] As we all know, the higher the resistance of the wire, the greater the loss on the wire. According to relevant reports, the annual power loss of my country's power grid transmission lines is more than 8.0% of the transmitted power, and about 400 to 600 billion kWh of electric energy is wasted on the line as heat. How to reduce the large line loss faced by traditional wires, improve the efficiency of power transmission, and achieve energy-saving, environmentally friendly and economical operation is a problem that the majority of wire manufacturers need to think about. The main factors affecting the resistance of the wire are the conductivity of the conductor and the cross-sectional area of ​​the wire. With the rapid development o...

AI Technical Summary

Problems solved by technology

Various methods have been adopted in the industry to reduce the resistivity of aluminum conductors, but the resistivity and strength of aluminum are generally mutually restricted

For example: changing the microstructure of aluminum by annealing can increase the conductivity of aluminum from 61%IACS to above 63%IACS, but the state of aluminum changes from hard to soft, resulting in a great decrease in its strength. 160~200MPa is reduced to 60~95MPa, so that the overall breaking force of the conductor with the same cross-section is reduced by 25%~30%, and the safety and reliability of the conductor are greatly reduced, so it is not suitable for overhead laying applications; High-quality high-purity aluminum ingots are used to produce high-conductivity aluminum wire, but the increase in the purity of raw materials will inevitably lead to an increase in the cost of raw materials, making the price of high-conductivity wires much higher than the cost of ordinary wires

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