High-specific-strength magnesium-lithium-based composite material and preparation method thereof

A composite material and high specific strength technology, applied in chemical instruments and methods, electrolytic coatings, manufacturing tools, etc., can solve problems such as low strength and limited application range, and achieve high specific strength, uniform distribution of reinforcements, and low cost Effect

Active Publication Date: 2021-08-13
HARBIN ENG UNIV
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  • Abstract
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Problems solved by technology

Although magnesium-lithium alloy has many advantages such as low density, its strength is lower than other alloy...

Method used

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  • High-specific-strength magnesium-lithium-based composite material and preparation method thereof
  • High-specific-strength magnesium-lithium-based composite material and preparation method thereof
  • High-specific-strength magnesium-lithium-based composite material and preparation method thereof

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] The invention relates to a magnesium-lithium-based composite material and a preparation method thereof, in particular to a high-specific-strength magnesium-lithium-based composite material and a preparation method thereof. Specific steps are as follows:

[0030] (1) Homogenize the substrate LA141 ingot at 200°C for 12h.

[0031] (2) Cut the homogenized matrix LA141 ingot into a block plate with a size of 110mm×40mm×20mm, sand it until the surface is smooth, and then heat it at 250°C for 30 minutes for pre-rolling, and the amount of pressure per pass is 10% and keep warm for 5 minutes each time until the rolling reaches 2mm. Then the plate obtained by rolling is cut into 150mm × 130mm × 2mm flake plate, and the oxide layer on the surface is removed by sandpaper, cleaned with absolute ethanol, and used for film preparation; 1gM...

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Abstract

The invention provides a high-specific-strength magnesium-lithium-based composite material and a preparation method thereof. The high-specific-strength magnesium-lithium-based composite material takes an ultra-light magnesium-lithium alloy LA141 as a matrix and multi-walled carbon nano-tubes as a reinforcement, and is prepared through the following steps that (1) an MWCNTs film layer is prepared through an electrophoretic deposition technology; (2) an LA141/MWCNTs plate is prepared through accumulative roll bonding; and (3) stirring friction processing is carried out to prepare the LA141/MWCNTs composite material. According to the magnesium-lithium-based composite material and the preparation method thereof disclosed by the invention, the preparation of the magnesium-lithium-based composite material is realized by combining the electrophoretic deposition technology, an accumulative pack rolling technology and stirring friction processing; the method is easy to operate and low in cost, and the composite material which is ultra-fine in grain, uniform in reinforcement distribution and high in specific strength is prepared.

Description

technical field [0001] The invention relates to a magnesium-lithium-based composite material and a preparation method thereof, in particular to a high-specific-strength magnesium-lithium-based composite material and a preparation method thereof. Background technique [0002] The study found that by adding Li element to Mg, the density can be reduced to 1.35-1.65g / cm 3 , 1 / 4-1 / 3 lighter than ordinary magnesium alloys, due to its low density, magnesium-lithium alloys are called ultra-light alloys. In addition, the addition of Li elements changes the lattice structure of Mg from hexagonal close-packed (hcp) to body-centered cubic (bcc). Since the body-centered cubic structure has more slip systems than the close-packed cubic structure, the plasticity of metal magnesium is improved. Shapeshifting ability. It can be seen from the binary phase diagram of the magnesium alloy that when the Li content is less than 5.70%, only the α-Mg phase exists in the alloy; when the Li content ...

Claims

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Application Information

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IPC IPC(8): C22C23/00C25D13/02C22F1/06B21B1/22B23K20/12B32B9/00B32B9/04B32B15/04B32B37/06B32B37/10
CPCC22C23/00C25D13/02C22F1/06B21B1/22B23K20/1275B32B9/007B32B9/041B32B15/04B32B37/06B32B37/1054
Inventor 巫瑞智徐林王佳豪张春波侯乐干秦丰郝晓伟
Owner HARBIN ENG UNIV
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