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A kind of nanoparticle modified aluminum-lithium alloy material and preparation method thereof

A technology of aluminum-lithium alloy and particles, which is applied in the field of nano-particle modified aluminum-lithium alloy materials and its preparation, can solve the problems of high elastic modulus, poor thermal stability, high anisotropy, etc., and achieve low density, weldability and low cost , the effect of low alloy anisotropy

Active Publication Date: 2016-10-26
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

8090 aluminum-lithium alloy is a high-strength alloy that is quite mature in application at present. It has the characteristics of low density, high elastic modulus, and good low-temperature mechanical properties. It is the main material used in aerospace products, but it has low plasticity, high anisotropy, and thermal stability. Disadvantages such as poor sex

Method used

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  • A kind of nanoparticle modified aluminum-lithium alloy material and preparation method thereof
  • A kind of nanoparticle modified aluminum-lithium alloy material and preparation method thereof
  • A kind of nanoparticle modified aluminum-lithium alloy material and preparation method thereof

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Embodiment 1

[0033] Embodiment 1 Preparation of aluminum-lithium alloy material of the present invention

[0034] Mixing of ingredients: The raw materials are according to the mass content ratio: lithium 2.0wt%, copper 0.5wt%, the balance is aluminum, mix evenly and place in a power frequency electric furnace with a melting heating device and a nano-silicon carbide particle adding device, turn on the mechanical pump , The air in the furnace was extracted for 20 minutes and the air pressure in the furnace reached 5Pa.

[0035] Melting: Turn on the smelting heating device, pour inert gas for protection when the temperature reaches 310°C, maintain the pressure in the furnace at 30Pa, raise the temperature, control the temperature at 750°C for 3.5 hours, and melt into an alloy solution.

[0036] Add nano-silicon carbide particles: open the nano-silicon carbide particle adding device, add nano-silicon carbide particles with a mass content of 0.3wt%, wherein the nano-silicon carbide particles ha...

Embodiment 2

[0046] Embodiment 2 Preparation of aluminum-lithium alloy material of the present invention

[0047] Mixing of ingredients: The raw materials are according to the mass content ratio: lithium 2.5wt%, copper 0.3wt%, the balance is aluminum, mix evenly and place in a power frequency electric furnace with a smelting heating device and a nano-silicon carbide particle adding device, turn on the mechanical pump , The air in the furnace was extracted for 20 minutes and the air pressure in the furnace reached 5Pa.

[0048] Melting: Turn on the smelting heating device, and when the temperature reaches 310°C, pour in argon for protection, maintain the pressure in the furnace at 35Pa, raise the temperature, control the temperature at 750°C for 3.5 hours, and melt into an alloy solution.

[0049]Add nano-silicon carbide particles: open the nano-silicon carbide particle adding device, add nano-silicon carbide particles with a mass content of 0.5wt%, wherein the nano-silicon carbide particle...

Embodiment 3

[0059] Embodiment 3 Preparation of aluminum-lithium alloy material of the present invention

[0060] Mixing of ingredients: The raw materials are according to the mass content ratio: lithium 3wt%, copper 0.2wt%, and the balance is aluminum, mix them and place them in a power frequency electric furnace with a smelting heating device and a nano-silicon carbide particle adding device, turn on the mechanical pump, The air in the furnace was extracted for 20 minutes and the air pressure in the furnace reached 5 Pa.

[0061] Melting: Turn on the smelting heating device, and when the temperature reaches 310°C, pour in argon for protection, maintain the pressure in the furnace at 30Pa, raise the temperature, control the temperature at 750°C for 3.5 hours, and melt into an alloy solution.

[0062] Add nano-silicon carbide particles: open the nano-silicon carbide particle adding device, add nano-silicon carbide particles with a mass content of 0.2wt%, wherein the nano-silicon carbide pa...

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Abstract

The invention relates to a nano-particle modified aluminum lithium alloy material and a manufacturing method of the nano-particle modified aluminum lithium alloy material. The nano-particle modified aluminum lithium alloy bar comprises 2.0-3.5 wt% of lithium, 0.05-0.5 wt% of copper, 0.05-0.5 wt% of nanometer silicon carbide particles, and the balance aluminum. As the nanometer silicon carbide (SiC) particles are added into raw materials, the anisotropy of alloy can be reduced from a molecular perspective without corresponding aging treatment. Meanwhile, by the addition of the nanometer silicon carbide particles, the toughness and superplasticity of the alloy material are further improved. The vacuum melting process is improved preferably, aluminum lithium alloy melt is effectively prevented from absorbing hydrogen, impurities such as hydrogen, sodium and potassium are removed, at the same time, lithium, magnesium and other volatile alloying elements in the melt are prevented from being largely burnt, and component deviation of the material is avoided. The nano-particle modified aluminum lithium alloy bar can be widely used for the aspects of aviation, aerospace, automobiles, mechanical manufacturing, the shipping industry and the like.

Description

technical field [0001] The invention relates to an aluminum-lithium alloy material and a preparation method thereof, in particular to a nano-particle modified aluminum-lithium alloy material and a preparation method thereof. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. The metal element lithium (Li) is added to the aluminum alloy. The aluminum-lithium alloy has the advantages of low density, high specific strength and specific stiffness, excellent low temperature performance and corrosion resistance, and good superplasticity, while improving the elastic modulus of the alloy. Studies have shown that adding 1% Li to aluminum alloys can reduce the alloy density by 3% and increase the elastic modulus by 6%. Therefore, aluminum-lithium alloys have great technical and economic significan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/02C22C1/10
Inventor 孙飞赵勇
Owner SUZHOU RICHMOND ADVANCED MATERIAL TECH TRANSFER CO LTD
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