High-strength aluminum alloy

Abstract

The invention discloses a high-strength aluminum alloy which is an Al-Zn-Mg-Cu aluminum alloy. The high-strength aluminum alloy comprises the following components in percentage by mass: 7.0-9.0 percent of Zn, 1.3-2.0 percent of Mg, 1.5-3.0 percent of Cu, no more than 0.1 percent of Si, 0.1-0.3 percent of Mn, no more than 0.3 percent of Fe and the balance of Al and inevitable trace elements, wherein the ratio of Zn to Mg is 3.0-3.5. In such a way, the specific strength, the hardness, the corrosion resistance, the toughness, the machining performance, the welding performance and the like of the aluminum alloy can be improved.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a high-strength aluminum alloy. Background technique [0002] Al-Zn-Mg-Cu series aluminum alloy is a kind of high-performance aluminum alloy developed and developed in the 1960s with the background of aerospace materials. It has a series of advantages such as light weight, high strength, high toughness and low cost. It is widely used in the fields of aviation, transportation, ships and weapons, etc., and has extremely high application value. [0003] For traditional Al-Zn-Mg-Cu aluminum alloys, since the Zn content in the aluminum alloy is controlled at about 5.5%, it is difficult for the strength of the aluminum alloy to exceed 700 MPa, and the comprehensive performance of the aluminum alloy is not good. Contents of the invention [0004] The technical problem mainly solved by the present invention is to provide a high-strength aluminum alloy which can improve the specific stre...

AI Technical Summary

Problems solved by technology

[0003] For traditional Al-Zn-Mg-Cu aluminum alloys, since the Zn content in the aluminum alloy is controlled at about 5.5%, it is difficult for the strength of the aluminum alloy to exceed 700 MPa, and the overall performance of the aluminum alloy is not good.