Formulating method for Al-Cu alloy round aluminum rod

Abstract

The invention relates to a preparation method for Al-Cu alloy round aluminum rod. The invention is characterized in that the method includes the following steps: (1) loading aluminum liquid with aluminum content of above 99.5%, controlling temperature thereof at 780-800 DEG C; (2) adding copper to control copper content between 0.35% and 0.8%, keeping the temperature at 780-800 DEG C for more than two hours, stirring at the same time; (3) adding silicon and iron into the aluminum liquid in the step (2), with silicon content controlled below 0.1% and iron content controlled below 0.4%, appropriately mixing after adding, and then melting, continuous casting and continuous rolling, thus Al-Cu alloy round aluminum rod is obtained. Compared with the ordinary pure round aluminum rod for electrical purpose, the maximum tensile strength of the inventive Al-Cu alloy round aluminum rod is improved by about 15% and the corresponding elongation is increased by over 30%, while the resistance rate is almost kept the same.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a preparation method of an Al-Cu alloy round aluminum rod. Background technique [0002] In the production of electrical round aluminum rods, there are two important quality indicators of the product. One is the resistivity, which affects the conductive effect of the final product wire and cable. It is mainly determined by the chemical composition of the raw materials, especially in aluminum alloys. , if other impurity elements such as silicon and iron are added, the resistivity will increase, which is not conducive to the control of product quality; the second is mechanical properties, including tensile strength and elongation, which will affect the drawing processing of electrical round aluminum rods. Product quality and overhead use when forming wire and cable, high tensile strength, large elongation, easy drawing processing, high production efficiency, good q...

AI Technical Summary

Problems solved by technology

At present, the electrical round aluminum rods widely produced in China belong to the pure aluminum series. The product resistivity is below 28.01nΩ·m, and the tensile strength is not high, basically below 140Mpa. When making wires and cables, steel cores need to be added to form cores. Aluminum stranded wires increase the weight of wires and cables, increase resistance, and reduce corrosion resistance, which has an adverse effect on large-span, long-distance high-voltage power transmission and transformation

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