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A kind of ultra-light high-strength cast aluminum-lithium alloy and preparation method thereof

A technology for casting aluminum and lithium alloys, which is applied in the field of aluminum-lithium alloys, can solve the problems that the advantages and properties of low density and high strength cannot be taken into account, and achieve the effects of improving solid solution strengthening, reducing the width of the solid-liquid phase interval, and reducing casting defects. Effect

Active Publication Date: 2021-09-21
郑州轻研合金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the technical problem that the advantages of low density and high strength of aluminum-lithium alloys in the prior art cannot be taken into account, the present invention provides an ultra-light high-strength cast aluminum-lithium alloy and a preparation method thereof, which can further reduce the density of the aluminum-lithium alloy while taking into account high strength

Method used

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  • A kind of ultra-light high-strength cast aluminum-lithium alloy and preparation method thereof
  • A kind of ultra-light high-strength cast aluminum-lithium alloy and preparation method thereof
  • A kind of ultra-light high-strength cast aluminum-lithium alloy and preparation method thereof

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Effect test

Embodiment 1

[0030] An ultra-light and high-strength cast aluminum-lithium alloy is composed of the following components in mass percentage: Li: 3.2%, Mg: 5.2%, Zr: 0.11%, Sc: 0.17%, and the balance is Al.

[0031] The preparation method of the above-mentioned ultra-light high-strength cast aluminum-lithium alloy comprises the following steps:

[0032] (1) Dosing according to the mass percentage of each component in the alloy, including pure aluminum, pure lithium, pure magnesium, Al-Zr10 master alloy, Al-Sc2 master alloy, Al-Ti-B refiner, the above raw materials Polishing (except lithium metal), preheating at 120~150°C;

[0033] (2) Add pure aluminum, pure lithium, pure magnesium, Al-Zr10 master alloy, Al-Sc2 master alloy gold into the crucible at one time, and put Al-Ti-B refiner into the secondary feeding hopper;

[0034] (3) Turn on the mechanical pump and the Roots pump in turn to evacuate to 3Pa, start to send electricity to melt and pass in argon to 5000Pa, and measure the temperat...

Embodiment 2

[0040] An ultra-light and high-strength cast aluminum-lithium alloy is composed of the following components in mass percentage: Li: 3.3%, Mg: 7.2%, Zr: 0.16%, Sc: 0.25%, and the balance is Al.

[0041] The preparation method of the above-mentioned ultra-light high-strength cast aluminum-lithium alloy comprises the following steps:

[0042] (1) Dosing according to the mass percentage of each component in the alloy, including pure aluminum, pure lithium, pure magnesium, Al-Zr10 master alloy, Al-Sc2 master alloy, Al-Ti-B refiner, the above raw materials Polishing, preheating at 120~150°C;

[0043] (2) Add pure aluminum, pure lithium, pure magnesium, Al-Zr10 master alloy, Al-Sc2 master alloy gold into the crucible at one time, and put Al-Ti-B refiner into the secondary feeding hopper;

[0044] (3) Turn on the mechanical pump and the Roots pump in turn to evacuate to 3Pa, start to send electricity to melt and pass in argon to 4000Pa, measure the temperature when the alloy solution...

Embodiment 3

[0049] An ultra-light and high-strength cast aluminum-lithium alloy is composed of the following components in mass percentage: Li: 2.8%, Mg: 8.2%, Zr: 0.15%, Sc: 0.14%, and the balance is Al.

[0050] The preparation method of the above-mentioned ultra-light high-strength cast aluminum-lithium alloy comprises the following steps:

[0051] (1) Dosing according to the mass percentage of each component in the alloy, including pure aluminum, pure lithium, pure magnesium, Al-Zr10 master alloy, Al-Sc2 master alloy, Al-Ti-B refiner, the above raw materials Polishing, preheating at 120~150°C;

[0052] (2) Add pure aluminum, pure lithium, pure magnesium, Al-Zr10 master alloy, Al-Sc2 master alloy gold into the crucible at one time, and put Al-Ti-B refiner into the secondary feeding hopper;

[0053] (3) Turn on the mechanical pump and the Roots pump in turn to evacuate to 3Pa, start to send electricity to melt and pass in argon to 5000Pa, measure the temperature when the alloy solution...

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Abstract

Aiming at the technical problem that the low-density and high-strength advantages of aluminum-lithium alloys in the prior art cannot be taken into account, the present invention provides an ultra-light high-strength cast aluminum-lithium alloy and its preparation method, which consists of the following components in mass percentage: Li 2.5~ 3.5%, Mg 5.2~9.2%, Zr 0.08~0.20%, Sc 0.08~0.30%, a small amount of impurity elements and the total content of impurity elements is less than 0.25%, and the balance is Al. The invention can further reduce the density of the aluminum-lithium alloy while taking into account high strength.

Description

technical field [0001] The invention belongs to the technical field of aluminum-lithium alloys, and in particular relates to an ultra-light high-strength cast aluminum-lithium alloy and a preparation method thereof. Background technique [0002] As a lightweight, high-strength, corrosion-resistant metal structure material, cast aluminum-lithium alloy has very broad application prospects in the fields of aviation and aerospace. For every 1% lithium added to the alloy, the density will decrease by 3%, and the elastic modulus will increase by 6%. %, the use of lightweight high-strength cast aluminum-lithium alloys instead of conventional high-strength cast aluminum alloys can reduce the weight of the structure by 10% to 20%, and increase the rigidity by 15% to 20%. , ultra-long-range, ultra-high-speed strike development needs. [0003] At present, there are relatively few studies on casting aluminum-lithium alloys. Only Russia and the United States have carried out research wo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/03C22F1/047
Inventor 马凯杰肖阳刘志鹏程家尧王松森解海涛郭晓光王军武
Owner 郑州轻研合金科技有限公司