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Method for development of ultrahigh-strength ultrahigh-toughness aluminum alloy

An aluminum alloy and ultra-high-strength technology, which is applied in the development of ultra-high-strength and ultra-tough aluminum alloys, can solve problems such as stress corrosion cracking, poor alloy plasticity and corrosion resistance, and achieve the effect of improving process performance and forming performance.

Inactive Publication Date: 2012-05-23
廖龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this type of alloy is that while obtaining high strength through high alloying, the alloy has poor plasticity and corrosion resistance, and is prone to stress corrosion cracking

Method used

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Examples

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Embodiment Construction

[0011] Guided by the refinement of the solid-state structure and the precise regulation of the morphology and distribution of multi-phase and multi-level strengthening phases, appropriate heat treatment and multi-level aging are used to make the size of the strengthening phase multi-level topological distribution, and control the precipitated phases and phases near the grain boundaries. Solute distribution, grain boundary structure and orientation distribution, realizing the precipitation of multiple dispersed phases and the optimization of intragranular and grain boundary structures. Specifically, double-stage aging is carried out at a temperature lower than and higher than the solvus temperature in the GP region to obtain a very fine and high-density dispersed transitional precipitation phase to achieve the best strengthening effect. At the same time, an appropriate amount of coarse precipitated phase is obtained to increase the work hardening rate and homogenize the plastic ...

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Abstract

The invention relates to a method for development of an ultrahigh-strength ultrahigh-toughness aluminum alloy. The method utilizes an Al-Zn-Mg-Cu alloy as a base material. Through the method, a ratio of main alloy elements is optimized; types and content of added elements are determined; and the research on trace impurity element existence forms and action mechanisms, melt purification, a casting and solidification technology, a deformation and heat treatment technology, and an ultrahigh-strength aluminum alloy application technology is realized.

Description

【Technical field】 [0001] The invention relates to a method for developing an ultra-high-strength and super-toughness aluminum alloy, especially high-strength aluminum alloys widely used in the aerospace industry are mainly LC4, LC9, and LD10 similar to Russian B95Ц and American 7075 and 2014 alloys. Although research on high-strength aluminum alloys such as 7050 has also begun in recent years, most of them still focus on improving the toughness and corrosion resistance of the alloy, and their strength is mostly maintained at the level of 7075-T6, and there are even different degrees. reduce. 【Background technique】 [0002] The ultra-high-strength aluminum alloy with industrial significance belongs to Al-Zn-Mg-Cu alloy. The main problem of this type of alloy is that while obtaining high strength through high alloying, the alloy has poor plasticity and corrosion resistance, and is prone to stress corrosion cracking. As early as the early days of the discovery of Al-Zn-Mg-Cu ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22F1/04
Inventor 廖龙
Owner 廖龙