High-strength single-phase (alpha phase) Mg-Li alloy material and preparation method thereof

A magnesium-lithium alloy, high-strength technology is applied in the field of high-strength single-phase magnesium-lithium alloy materials and their preparation, which can solve the problems of no longer significant improvement in alloy strength and decrease in plasticity, and achieves improved strength, improved application, and increased quantity. Effect

Active Publication Date: 2019-01-04
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the Y content exceeds 3%, the strength of the alloy is no longer significantly improved, and the plasticity is also reduced (Journal of Alloys and Compounds, 2010, 506(1): 468-474.)

Method used

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  • High-strength single-phase (alpha phase) Mg-Li alloy material and preparation method thereof
  • High-strength single-phase (alpha phase) Mg-Li alloy material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A high-strength single-phase (α-phase) magnesium-lithium alloy material, the magnesium-lithium alloy material contains the following components by weight: Li: 5.7wt%, Y: 9.0wt%, Co: 6.0wt%, the rest is Mg and not Avoided impurities, the content of unavoidable impurities is ≤0.03wt%.

[0044] A method for preparing a high-strength single-phase (α-phase) magnesium-lithium alloy material, comprising:

[0045] 1) vacuum smelting the preheated metal raw materials to obtain alloy liquid, the vacuum smelting adopts electromagnetic induction heating with a frequency of 0.065 MHz, and then casts it into a mold to cool to obtain cast magnesium-lithium alloy;

[0046] 2) Homogenizing the obtained cast magnesium-lithium alloy at a temperature of 240° C. for 9 hours;

[0047] 3) The homogenized magnesium-lithium alloy is subjected to low-temperature rolling, the rolling temperature of the first pass is 355°C, the roll speed is 11r / min, the reduction is 22.5%, and air-cooled after 1...

Embodiment 2

[0049] A high-strength single-phase (α-phase) magnesium-lithium alloy material, comprising the following components by weight percentage: Li: 2.6wt%; Tb: 7.5wt%; Co: 4.5wt%, the rest is Mg and unavoidable impurities, not The content of avoided impurities is ≤0.03wt.%.

[0050] A method for preparing a high-strength single-phase (α-phase) magnesium-lithium alloy material, comprising:

[0051] 1) vacuum smelting the preheated metal raw material to obtain alloy liquid, the vacuum smelting adopts electromagnetic induction heating with a frequency of 0.05MHz, and then casts it into a mold to cool to obtain cast magnesium-lithium alloy;

[0052] 2) Homogenizing the obtained cast magnesium-lithium alloy at a temperature of 220° C. for 8 hours;

[0053] 3) The homogenized magnesium-lithium alloy is subjected to low-temperature rolling, the rolling temperature of the first pass is 352°C, the roll speed is 10r / min, the reduction is 20%, and air cooling is carried out after 12 minutes o...

Embodiment 3

[0055] A high-strength single-phase (α-phase) magnesium-lithium alloy material, comprising the following components by weight: Li: 0.1wt%; Y: 6.0wt%; Co: 3.0wt%, and the rest are Mg and unavoidable impurities. The content of avoided impurities is ≤ 0.03 wt%.

[0056] A method for preparing a high-strength single-phase (α-phase) magnesium-lithium alloy material, comprising:

[0057] 1) vacuum smelting the preheated metal raw material to obtain alloy liquid, the vacuum smelting adopts electromagnetic induction heating with a frequency of 0.08MHz, and then casts it into a mold to cool to obtain cast magnesium-lithium alloy;

[0058] 2) homogenizing the obtained cast magnesium-lithium alloy at a temperature of 250° C. for 10 hours;

[0059] 3) The homogenized magnesium-lithium alloy is subjected to low-temperature rolling, the rolling temperature of the first pass is 358°C, the roll speed is 12r / min, the reduction is 25%, and air cooling is carried out after 14 minutes of heat pr...

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Abstract

The invention provides a high-strength single-phase (alpha phase) Mg-Li alloy material and a preparation method thereof, and belongs to the field of metal structural materials. The Mg-Li alloy material is prepared from components in percentage by weight as follows: 0-5.7% of Li, 6.0%-9.0% of rare earth elements, 3.0%-6.0% of Co and the balance of Mg and inevitable impurities. The preparation method of the Mg-Li alloy material comprises the following steps: preheated raw metal is melted in vacuum, an alloy solution is obtained, poured to a mold and cooled, and a cast-state Mg-Li alloy is obtained; the obtained cast-state Mg-Li alloy is subjected to homogenization treatment; the homogenized Mg-Li alloy is rolled at low temperature, wherein low-temperature rolling adopts cross accumulative roll bonding. The Mg-Li alloy material is prepared through steps of vacuum casting, homogenization treatment and low-temperature rolling by reasonably selecting alloy elements and controlling content and proportion of the alloy elements, and has the advantages of high cleanness, high strength and high plasticity.

Description

technical field [0001] The invention belongs to the field of metal structural materials, and in particular relates to a high-strength single-phase (α-phase) magnesium-lithium alloy material and a preparation method thereof. Background technique [0002] In recent years, with the increasing scarcity of energy, the traditional manufacturing industry has brought serious environmental problems, and more and more researchers have to focus on metal structural parts that can reduce weight, save energy and reduce emissions. As the lightest metal structure material (density 1.4-1.6g / cm 3 ), magnesium-lithium alloy not only has high specific strength and specific stiffness, but also has the characteristics of shock absorption and noise reduction, electromagnetic shielding and resistance to high-energy particle penetration. In recent years, with its unique performance advantages, magnesium-lithium alloys have shown broad application prospects in aerospace, weaponry, electronic 3C and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 冷哲周英棠陈立桥龙运前余璇于晓明张挥球蔡璐
Owner ZHEJIANG OCEAN UNIV
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