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A kind of aluminum-lithium alloy material and its preparation method with improved vacuum melting process

A technology for aluminum-lithium alloys and alloy materials, which is applied in the field of preparation of aluminum-lithium alloy materials and their improved vacuum melting process, can solve the problems of low plasticity of aluminum-lithium alloys, achieve high alloy plasticity and toughness, prevent hydrogen absorption, and increase content Effect

Active Publication Date: 2016-08-24
SUZHOU RICHMOND ADVANCED MATERIAL TECH TRANSFER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, since the aluminum-lithium alloy contains lithium, it will inevitably contain alkali metal impurities such as sodium, potassium and other elements of the same family as the lithium element, and hydrogen and alkali metal impurities are important reasons for the low plasticity of the aluminum-lithium alloy.

Method used

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  • A kind of aluminum-lithium alloy material and its preparation method with improved vacuum melting process
  • A kind of aluminum-lithium alloy material and its preparation method with improved vacuum melting process
  • A kind of aluminum-lithium alloy material and its preparation method with improved vacuum melting process

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Effect test

Embodiment 1

[0030] Embodiment 1 Preparation of aluminum-lithium alloy material of the present invention

[0031] Batching smelting: The raw materials are according to the mass ratio: lithium 2.0wt%, copper 0.03wt%, magnesium 5.0wt%, zirconium 0.1wt%, titanium 0.01wt%, iron 0.1wt%, silicon 0.05wt%, the balance is aluminum The ratio is put into the melting furnace, and the temperature of the melting furnace is controlled at 800° C. for 1.5 hours.

[0032] Detection: Spectroscopic analysis is used to detect the smelted alloy liquid to ensure that its composition is within the range.

[0033] Vacuum smelting: heat the alloy liquid to 700°C and place it in a vacuum melting furnace for remelting. Under the conditions of 700°C and 300Pa vacuum, vacuum smelt for 20 minutes.

[0034] Hydrogen absorption detection: through volumetric method, gravimetric method and other chemical methods to detect the hydrogen absorption of the alloy to be less than or equal to the mass fraction of 1×10 -7 .

[0...

Embodiment 2

[0042] Embodiment 2 Preparation of aluminum-lithium alloy material of the present invention

[0043] Batching smelting: the raw materials are according to the mass ratio: lithium 3.5wt%, copper 0.01wt%, magnesium 6.8wt%, zirconium 0.35wt%, titanium 0.1wt%, iron 0.2wt%, silicon 0.15wt%, the balance is aluminum The proportion is put into the smelting furnace, and the temperature of the smelting furnace is controlled at 850° C. for 1 hour.

[0044] Detection: Spectroscopic analysis is used to detect the smelted alloy liquid to ensure that its composition is within the range.

[0045] Vacuum smelting: heat the alloy liquid to 700°C and place it in a vacuum melting furnace for remelting. Under the conditions of 700°C and 500Pa vacuum, vacuum smelt for 20 minutes.

[0046] Hydrogen absorption detection: through volumetric method, gravimetric method and other chemical methods to detect the hydrogen absorption of the alloy to be less than or equal to the mass fraction of 1×10 -7 . ...

Embodiment 3

[0054] Embodiment 3 Preparation of aluminum-lithium alloy material of the present invention

[0055] Ingredients smelting: The raw materials are according to the mass ratio: lithium 2.75wt%, copper 0.02wt%, magnesium 7.5wt%, zirconium 0.275wt%, titanium 0.05wt%, iron 0.15wt%, silicon 0.1wt%, the balance is aluminum The ratio is put into the melting furnace, and the temperature of the melting furnace is controlled at 850° C. for 1.5 hours.

[0056] Detection: Spectroscopic analysis is used to detect the smelted alloy liquid to ensure that its composition is within the range.

[0057]Vacuum melting: heat the alloy liquid to 700°C and put it in a vacuum melting furnace for melting again. Under the conditions of 700°C temperature and 1000Pa vacuum degree, vacuum melting is carried out for 20 minutes.

[0058] Hydrogen absorption detection: through volumetric method, gravimetric method and other chemical methods to detect the hydrogen absorption of the alloy to be less than or equ...

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Abstract

The invention relates to an aluminum-lithium alloy material and a preparation method of the alloy material by improving a vacuum melting process. The aluminum-lithium alloy material comprises the following components by weight percent: 2.0%-3.5% of lithium, 0.01%-0.03% of copper, 5.0%-7.5% of magnesium, 0.1%-0.35% of zirconium, 0.01%-0.1% of titanium, 0.1%-0.2% of iron, 0.05%-0.15% of silicon and the balance of aluminum. The preparation method is characterized in that a vacuum melting step is added to a melting process of aluminum-lithium alloy, and the vacuum melting process is improved, so that the melting loss of a large quantity of easily volatile alloy elements such as lithium, magnesium and the like in melts is reduced while impurities such as hydrogen, sodium, potassium and the like can be effectively removed, and the component deviation of the materials is avoided. The aluminum-lithium alloy material has the characteristics of high alloy plasticity and toughness, weldability, high strength, low density, high elastic modulus, good corrosion resistance and low cost, and can be widely used in aspects of machinery manufacturing, transport machinery, power machinery, aviation industry and the like.

Description

technical field [0001] The invention relates to an aluminum-lithium alloy material and a preparation method thereof with an improved vacuum smelting process, in particular to an aluminum-lithium alloy material with a low material loss rate and a preparation method thereof with an improved vacuum smelting process. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. In recent years, science and technology and industrial economy have developed rapidly. [0003] Due to the low density of aluminum alloy, but relatively high strength, close to or exceeding high-quality steel, good plasticity, can be processed into various profiles, with excellent electrical conductivity, thermal conductivity and corrosion resistance, it is widely used in industry, and its usage is second only to aluminum alloy. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/02
Inventor 孙飞赵勇
Owner SUZHOU RICHMOND ADVANCED MATERIAL TECH TRANSFER CO LTD
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