A kind of high comprehensive performance al-zn-mg aluminum alloy material and its preparation method and application

Abstract

The invention relates to an Al-Zn-Mg aluminum alloy material with high comprehensive performance as well as a preparation method and an application thereof. The Al-Zn-Mg aluminum alloy material comprises the following chemical components in percentage by weight: 4.2%-5.2% of Zn, 0.8%-1.6% of Mg, 0.05%-0.3% of Cu, 0.15%-0.45% of Mn, 0.10%-0.40% of Cr, 0.10%-0.20% of Zr, 0.01%-0.06% of V, 0.02%-0.10% of Ti, less than 0.2% of Fe, less than 0.15% of Si, not greater than 0.15% of other impurity elements and the balance Al, wherein the content of the single impurity element is not greater than 0.05%. According to the Al-Zn-Mg aluminum alloy material as well as the preparation method and the application thereof, the Al-Zn-Mg aluminum alloy material with high strength, corrosion resistance and welding performance is obtained through reasonably regulating and controlling the contents of the components in the aluminum alloy material and the parameter ranges of procedures in a preparation processfor a plate.

Description

technical field [0001] The invention relates to an Al-Zn-Mg aluminum alloy material with high comprehensive performance, a preparation method and application thereof, and belongs to the technical field of aluminum alloy material processing. Background technique [0002] The lightweight of vehicles is the goal that people have been pursuing. The application of lightweight and high-strength structural materials can significantly reduce the fuel consumption of vehicles and improve transportation efficiency. [0003] Aluminum alloys are widely used as structural materials in rail transit, aerospace and other fields because of their light weight, good corrosion resistance, and easy processing. Among them, the Al-Zn-Mg series aluminum alloy is an alloy that can be strengthened by heat treatment. After aging treatment, its strength can be greatly increased; at the same time, it is favored by people because of its low density, and it has become the preferred structural material for...

AI Technical Summary

Problems solved by technology

[0004] However, during the long-term service of the vehicle, the components (especially the welding parts of the components) are often corroded due to the action of the corrosive medium. In severe cases, the components are damaged in advance, the service life is greatly shortened, and even the traffic safety is endangered.

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