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Method for reducing hydrogen content in aluminum-lithium alloy casting

An aluminum-lithium alloy and hydrogen content technology, which is applied in the field of reducing hydrogen content in aluminum-lithium alloy casting, can solve the problems of large climate impact, no consideration of the problems of hydrogen removal and impurity purification of aluminum-lithium alloy, no transmission and impurity removal system design, etc. , to achieve the effect of controllable temperature and atmosphere

Inactive Publication Date: 2020-03-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Both U.S. Patent 386840 and European Patent 0726114A2 proposed a complete set of solutions that cover the surface of the liquid with alkaline dissolved salt and then use argon to isolate the air. avoiding the introduction of more impurities
Chinese patent 202450144 describes the structural design of an aluminum-lithium alloy dehydrogenation furnace that reduces the hydrogen content by argon, but does not design the entire transmission and impurity removal system
Therefore, molten salt protection is greatly affected by the climate and is not operable. The casting of aluminum-lithium alloys urgently needs a protective measure suitable for various climates.

Method used

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  • Method for reducing hydrogen content in aluminum-lithium alloy casting

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Embodiment 1

[0044] The purpose of the present invention is to provide a complete set of methods for protecting the aluminum-lithium alloy solution, reducing the hydrogen content and removing impurities, so as to effectively control the impurities and hole defects of the ingot and ensure the production of high-quality aluminum-lithium alloy ingot. The method includes:

[0045] 1. In the induction melting furnace, a certain amount of argon gas is injected from the top to form a melting environment isolated from the atmosphere, which effectively avoids the reaction of the aluminum-lithium alloy liquid surface absorbing hydrogen from the humid air;

[0046] 2. Between the smelting furnace and the dehydrogenation furnace such as the feed port, the aluminum-lithium alloy liquid transmission system adopts resistance heating, and is equipped with argon gas purging to ensure that the temperature and atmosphere are controllable during the transportation process;

[0047] 3. The dehydrogenation furn...

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Abstract

The invention relates to a method for reducing hydrogen content in aluminum-lithium alloy casting. The method is a method for casting high-quality aluminum-lithium alloy ingots to realize the isolation of the aluminum-lithium alloy from the atmosphere through argon protection, thereby reducing the reaction with humid air and hydrogen absorption during smelting, transmission, and filtering to achieve the control of the hydrogen content and oxide inclusions.

Description

technical field [0001] The invention is suitable for the production process of lithium-containing aluminum alloy melting and casting, adopts argon protection, isolates the direct contact between the air and the liquid surface of the aluminum-lithium alloy, and avoids the hydrogen absorption and oxidation of the aluminum-lithium alloy from the humid air, thereby effectively controlling the aluminum alloy The lithium alloy hydrogen content and oxide impurity content are finally used to cast high-quality aluminum-lithium alloy ingots and processed into materials, which are used for lightweight and high-strength parts in aerospace and other fields. Background technique [0002] In the field of aerospace, aluminum-lithium alloys are more and more widely used in the processing and manufacturing of core components due to their high specific strength, high elastic modulus, excellent fatigue and corrosion resistance, and easy processing. For example, the improved recyclability of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/05C22B21/06B22D27/13
CPCB22D27/003B22D27/13C22B9/006C22B9/055C22B21/064
Inventor 王俊升
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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