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High-strength aluminum-lithium alloy profile for aerospace and preparation method of high-strength aluminum-lithium alloy profile

An aluminum-lithium alloy, high-strength technology, which is applied in the field of aluminum-lithium alloy profiles for aerospace and its preparation, can solve the problems of low strength of aluminum-lithium alloys and difficult casting of aluminum-lithium alloys, and achieve high yields and simple production equipment , fast cooling effect

Inactive Publication Date: 2018-11-06
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the aluminum-lithium alloy produced by the existing technology is difficult to be cast and formed, and the strength of the existing aluminum-lithium alloy is low, and proposes a manufacturing method of aerospace aluminum-lithium alloy and aluminum-lithium alloy profiles

Method used

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specific Embodiment approach 1

[0024] Specific embodiment one: This embodiment is a high-strength aluminum-lithium alloy profile for aerospace, which is composed of Cu, Li, Ti, Zn, Ti, Mg, Zr and Al; in the high-strength aerospace aluminum-lithium alloy profile The mass fraction of Cu is 3.7%-4.3%, the mass fraction of Li is 1.1%-1.45%, the mass fraction of Zn is 0.12%-0.25%, the mass fraction of Mg is 0.25%-0.8%, and the mass fraction of Zr is 0.08 % to 0.16%, the mass fraction of Ag is 0.25% to 0.6%, the mass fraction of Ti is 0.08% to 0.12%, the mass fraction of B is 0.02% to 0.08%, and the balance of Al, the high-strength aerospace aluminum The impurity elements in the lithium alloy profile are Mn, Fe and Si, and the mass fraction of Mn is ≤0.15%, the mass fraction of Fe is ≤0.12%, and the mass fraction of Si is ≤0.15%.

specific Embodiment approach 2

[0025] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the mass fraction of Cu in the high-strength aerospace aluminum-lithium alloy profile is 3.7% to 4%, and the mass fraction of Li is 1.1% to 1.27%. , the mass fraction of Zn is 0.12% to 0.18%, the mass fraction of Mg is 0.25% to 0.52%, the mass fraction of Zr is 0.08% to 0.12%, the mass fraction of Ag is 0.25% to 0.42%, and the mass fraction of Ti is 0.08% to 0.1%, the mass fraction of B is 0.02% to 0.05%, and the balance is Al. The impurity elements in the high-strength aerospace aluminum-lithium alloy profile are Mn, Fe and Si, and the mass fraction of Mn is ≤0.12% , the mass fraction of Fe≤0.10%, and the mass fraction of Si≤0.12%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is: the mass fraction of Cu in the high-strength aerospace aluminum-lithium alloy profile is 4% to 4.3%, and the mass fraction of Li is 1.28% to 1.45%. , the mass fraction of Zn is 0.19%-0.25%, the mass fraction of Mg is 0.53%-0.8%, the mass fraction of Zr is 0.12%-0.16%, the mass fraction of Ag is 0.43%-0.6%, and the mass fraction of Ti is 0.1% to 0.12%, the mass fraction of B is 0.05% to 0.08%, and the balance is Al. The impurity elements in the high-strength aerospace aluminum-lithium alloy profile are Mn, Fe and Si, and the mass fraction of Mn is ≤0.12% , the mass fraction of Fe≤0.10%, and the mass fraction of Si≤0.12%. Others are the same as the first embodiment.

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Abstract

The invention relates to a high-strength aluminum-lithium alloy profile for aerospace and a preparation method of the high-strength aluminum-lithium alloy profile. The high-strength aluminum-lithium alloy profile for the aerospace and the preparation method of the high-strength aluminum-lithium alloy profile aim to solve the problems that an aluminum and lithium alloy produced through an existingprocess is large in casting forming difficulty, and the strength of the existing aluminum and lithium alloy is low. The high-strength aluminum-lithium alloy profile for the aerospace is composed of Cu, Li, Ti, Zn, Ti, Mg, Zr and Al; and impurity elements are Mn, Fe and Si. The preparation method includes the steps that firstly, raw materials are weighed and taken; secondly, molten aluminum alloy is obtained due to smelting; thirdly, refining is performed after Al-Ti-B wires are added; fourthly, spraying forming is performed; fifthly, aluminum alloy short bars are formed due to cutting; sixthly, blind die extruding is performed so that extruded blank is obtained; seventhly, the extruded blank is extruded into a bar material; eighthly, extruding is performed again so that the profile is obtained; ninthly, the profile is subjected to quenching; tenthly, stretching and straightening are performed; and eleventhly, ageing treatment is performed, and the aluminum-lithium alloy profile is obtained. The preparation method is mainly used for preparing the high-strength aluminum-lithium alloy profile for the aerospace.

Description

technical field [0001] The invention relates to an aluminum-lithium alloy profile for aerospace and a preparation method thereof. Background technique [0002] With the development of the aerospace industry, new aluminum alloys continue to develop and emerge, and aluminum-lithium alloys have gained more room for development. Alcoa has produced professional aluminum-lithium alloy production lines, and the development of aluminum-lithium alloys in my country is still Very slowly, in order to meet the development needs of my country's aerospace industry, a high-strength aluminum-lithium alloy is now needed. [0003] Because the lithium element in aluminum-lithium alloys is particularly active, the casting process usually uses a vacuum furnace, which requires gas protection throughout the casting process. The production equipment is complex and difficult to exceed. The production quality of high-alloyed aluminum-lithium alloys is very unstable and difficult to meet needs of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/18C22C21/16C22C21/14C22C1/03C22F1/057B22F3/115
Inventor 高新宇王国军徐涛王金花孙婧彧李浩言王海彬高宝亭郑天航贾宁
Owner NORTHEAST LIGHT ALLOY CO LTD
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