Aluminum bronze material for copper bar of rotor of asynchronous AC motor and preparation method thereof

Abstract

The invention discloses an aluminum bronze material for a copper bar of a rotor of an asynchronous AC motor and a preparation method thereof. The material comprises the following chemical components in percentage by weight: 8.0-8.5% of Al, the balance of Cu, not greater than 0.5% of Ni, not greater than 0.5% of Mn, and not greater than 0.5%. The preparation method comprises the following steps: preparing the elements based on ratio; smelting through a vacuum intermediate-frequency sensing electric furnace; pouring to obtain a cast ingot with the required size; and processing the cast iron by thermal extruding, cold drawing, thermal treating and stress relieving and annealing to obtain the material. According to the method, the overall performances of the materials are further improved on the preparation basis; the Rm is not less than 500MPa under room temperature; the yield intensity is not less than 300MPa under Rp 0.2; the ductility A is not less than 25%; the electric conductivity can be adjusted based on different components, and the stability is ensured. Therefore, the material is high in profile intensity, high in harness, high in impact performance, stable in electric conductivity, simple in preparation processes, energy saving, consumption reducing, and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of motor rotor material manufacturing, and in particular relates to an aluminum bronze material for an asynchronous AC motor rotor copper bar and a preparation method thereof. Background technique [0002] The global energy is very scarce. In order to respond to energy conservation, environmental protection, and emission reduction, countries around the world are vigorously accelerating the development of nuclear power energy. China will also vigorously develop clean power. Among them, nuclear power is the main direction of power structure adjustment in the country in the future, and the investment scale will greatly exceed that of conventional power plants. . The country's strategy for nuclear power development has changed from "moderate development" to "active development". Under such a background, China's nuclear power energy will have good development opportunities. With the development of clean power s...

AI Technical Summary

Problems solved by technology

[0003] The currently used Cu-Al alloy is an alloy with copper and zinc as the main alloying elements. It is the earliest cast aluminum alloy used in industry. 2 The potential difference between the Cu) phase and the α(Al) matrix is ​​large, the corrosion resistance is low, and the density is high. Due to the large solidification range, the casting performance is poor, and it has light weight and high tensile strength.