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High-strength and high-plasticity layered heterogeneous magnesium-lithium composite material and preparation method thereof

A composite material and high plasticity technology, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of limited lifting effect, achieve simple preparation method, excellent plastic deformation ability, and easy control of material shape and size Effect

Active Publication Date: 2021-06-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have improved the mechanical properties of magnesium-lithium alloys to a certain extent, the improvement effect is limited.

Method used

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  • High-strength and high-plasticity layered heterogeneous magnesium-lithium composite material and preparation method thereof
  • High-strength and high-plasticity layered heterogeneous magnesium-lithium composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] A layered magnesium-lithium heterogeneous material plate, the material used includes two kinds of magnesium-lithium alloys, and the present invention takes LA103Z magnesium-lithium alloy and LA43M magnesium-lithium alloy as examples. It is characterized in that two magnesium-lithium alloys with different strong plastic properties are stacked and rolled in a "sandwich" manner to achieve a heterogeneous structure.

[0031] The preparation method of the above-mentioned layered magnesium-lithium heterogeneous material plate is characterized in that it comprises the following steps:

[0032] Step 1: First take LA103Z and LA43M magnesium-lithium alloy plates with a size of 50mmⅹ30mmⅹ3.5mm, then sand the joint surface-clean with acetone ultrasonically for 20min, and finally blow dry.

[0033] Step 2: Stack the obtained magnesium-lithium composite materials together according to the "sandwich" structure of LA43M / LA103Z / LA43M, drill four holes on the alloy plate with a 2mm drill...

Embodiment 2

[0036] Step 1: Take two magnesium-lithium plates LA91 and LA43M each with a size of 50mmⅹ25mmⅹ3.5mm, polish to remove the oxide layer, and then ultrasonically treat in acetone for 20min to clean the surface. Stack the two boards after surface treatment, drill holes with a drill bit and fix them with wire.

[0037] Step 2: Put the sample in step 1 into a muffle furnace and keep it warm at 400°C for 20 minutes.

[0038] Step 3: In step 2, the sample after the heat preservation is completed is taken out, put into a roll for rolling, and the rolling reduction is 75%.

Embodiment 3

[0040] Step 1: Take two kinds of magnesium-lithium plates LA43M and LA130Z with a size of 50mmⅹ30mmⅹ3.5mm, polish their surfaces to remove the oxide layer, and then ultrasonically treat them in acetone for 20min. Stack and fix the two surface-treated plates together in the order of LA103Z / LA43M / LA103Z.

[0041] Step 2: Put the sample in step 1 into a high-temperature furnace and keep it at 400°C for 20 minutes.

[0042] Step 3: In step 2, take out the sample at the end of heat preservation, and roll it, and the rolling reduction is 55%

[0043] Step 4: Anneal the rolled sample at 300° C. for 1 hour.

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Abstract

The invention belongs to the field of heterogeneous materials, and particularly relates to a high-strength and high-plasticity layered heterogeneous magnesium-lithium composite material and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating single-phase magnesium-lithium alloy plates and double-phase magnesium-lithium alloy plates which are greatly different in strength and plasticity, and stacking the single-phase magnesium-lithium alloy plate and the double-phase magnesium-lithium alloy plate according to a high-strength and low-plasticity / low-strength and high-plasticity / high-strength and low-plasticity mode; (2) after the stacked plates are subjected to high-temperature heat preservation, conducting rolling; and (3) after the plates obtained in the step (2) are subjected to surface treatment, the step (2) is repeated. Magnesium-lithium alloys greatly different in strength and plasticity are tightly combined together through accumulative rolling, a layered heterogeneous structure is formed at the same time, the strengthening effect induced by heterogeneous deformation can be generated due to the strength and plasticity differences existing between different areas during deformation, and therefore the strength and plasticity of the material are improved at the same time.

Description

technical field [0001] The invention belongs to the field of heterogeneous materials, in particular to a high-strength and high-plastic layered heterogeneous magnesium-lithium composite material and a preparation method thereof. Background technique [0002] In order to meet the higher demand for lightweight and high-performance metal materials in industrial development, it is very important to improve the comprehensive properties of alloys. Magnesium-lithium alloy is currently the lightest metal structure material, which has the advantages of high specific strength and low density. It has a wide range of functions in aerospace, automobile, electronics industry, communication and other fields. However, the poor plastic deformation ability and low strength of magnesium-lithium alloy at room temperature still limit its application. [0003] With the gradual deepening of the exploration of metal materials, heterostructure materials have attracted widespread attention because ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00B21B37/58C22F1/06
CPCB21B1/38B21B47/00B21B37/58C22F1/06B21B2001/386Y02E60/10
Inventor 聂金凤刘站郝肖杰赵永好李玉胜曹阳周浩
Owner NANJING UNIV OF SCI & TECH
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