Homogenizing treatment method for strengthening Al-Zn-Mg-Cu series ultrahigh strength aluminum alloy

Abstract

The invention provides a homogenizing treatment method for strengthening a Al-Zn-Mg-Cu series ultrahigh strength aluminum alloy, which comprises the following steps of: when the melt of the Al-Zn-Mg-Cu series ultrahigh strength aluminum alloy is subjected to metal mold casting, putting the alloy into a box-type resistance furnace for heat preservation after the temperature of the alloy is reduced to homogenizing treatment temperature below solidus temperature in a casting process, taking out and performing air cooling. The casting process and a heat treatment process are integrated, so that the problem caused by reheating and the improper control of heating rate is effectively solved, high supersaturation solid solubility can be achieved in short time, good organization foundations are laid for subsequent solid solution and ageing treatment, and the homogenizing heat preservation time is shortened at the same time.

Description

technical field [0001] The invention relates to a homogenization treatment method for strengthening Al-Zn-Mg-Cu series ultra-high-strength aluminum alloys, and belongs to the field of metal materials and metallurgy. Background technique [0002] As the main body of high-strength and high-toughness aluminum alloys, Al-Zn-Mg-Cu ultra-high-strength aluminum alloys have high specific strength and hardness, good corrosion resistance and high toughness, excellent processing performance and welding performance. , is widely used in aviation and aerospace fields, and has become one of the important structural materials in this field. As we all know, the preparation of Al-Zn-Mg-Cu ultra-high-strength aluminum alloys includes smelting and casting, homogenization treatment, plastic processing and heat treatment. Since metals and alloys generally have defects such as dendrite segregation during solidification, it is necessary to eliminate or reduce the inhomogeneity of chemical composit...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the homogenization treatment method commonly used in the existing Al-Zn-Mg-Cu series ultra-high strength aluminum alloys, and propose a method for strengthening Al-Zn-Mg-Cu series ultra-high strength aluminum alloys. The homogenization treatment method, which can save energy, shorten the homogenization holding time without affecting the homogenization treatment effect, thereby helping to further improve the performance of Al-Zn-Mg-Cu ultra-high-strength aluminum alloys and Broaden its scope of application

Images