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High-strength rare earth wrought magnesium alloy and preparation method thereof

A deformed magnesium alloy, high-strength technology, applied in the field of magnesium alloys, can solve the problems of poor elastic deformation resistance and unsatisfactory performance, and achieve the effect of improving the elastic modulus of the alloy, promoting grain recrystallization, and widening the application field

Active Publication Date: 2021-08-10
湖南镁卓新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the elastic modulus of magnesium alloy is only 60% of that of aluminum alloy, generally between 40-45GPa. Even for the high-strength heat-resistant rare earth magnesium alloy ZM6 (ZMgRE2ZnZr), its elastic modulus is only 45GPa. The elastic deformation ability is poor, which cannot meet the needs of light weight, high strength and high elastic modulus magnesium alloy materials in the engineering field

Method used

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  • High-strength rare earth wrought magnesium alloy and preparation method thereof
  • High-strength rare earth wrought magnesium alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) According to the composition ratio: Al 9%, Nd 2.0%, Zn 1.5%, Si 1.0%, Zr 1.5%, Y 6%, Gd5%, Sm 4%, and the balance is Mg. Weigh the raw material and place it at 180 Preheat raw materials at ℃ environment.

[0040] (2) Under argon atmosphere, place magnesium and aluminum in a crucible at 720°C and heat and melt for 2 hours, then raise the temperature to 770°C, add zirconium, neodymium and silicon to melt, then cool down to 700°C, add zinc and continue to melt for 3 hours, then heat up to 820°C Add rare earth elements yttrium, gadolinium, and samarium at ℃ to stir and melt the alloy to homogenize the alloy, then skim off the scum to obtain alloy liquid. After the alloy liquid is refined at 750 °C for 20 minutes, it is poured to obtain a high-strength rare earth deformed magnesium alloy.

Embodiment 2

[0042] (1) According to the composition ratio: Al 6%, Nd 2.5%, Zn 0.8%, Si 1.2%, Zr 1.2%, Y 7%, Gd7%, Sm 5%, the balance is Mg, weigh the raw material and place it in 200 Preheat raw materials at ℃ environment.

[0043] (2) Under argon atmosphere, place magnesium and aluminum in a crucible at 700°C to heat and melt for 1 hour, then raise the temperature to 750°C, add zirconium, neodymium and silicon in turn to melt, then cool down to 680°C, add zinc and continue to melt for 5 hours, then heat up to 800°C Add rare earth elements yttrium, gadolinium, and samarium to stir and melt the alloy at ℃ to homogenize the alloy, then skim off the scum to obtain alloy liquid. After the alloy liquid is refined at 780 °C for 20 minutes, it is poured to obtain a high-strength rare earth deformed magnesium alloy.

Embodiment 3

[0045] (1) According to the composition ratio: Al 8%, Nd 1.5%, Zn 0.2%, Si 0.5%, Zr 1.2%, Y 5%, Gd5%, Sm 2%, the balance is Mg, weigh the raw material and place it at 150 Preheat raw materials at ℃ environment.

[0046] (2) Under argon atmosphere, place magnesium and aluminum in a crucible at 710°C to heat and melt for 2 hours, then raise the temperature to 760°C, add zirconium, neodymium and silicon in turn to melt, then cool down to 690°C, add zinc and continue to melt for 3 hours, then heat up to 810°C Add rare earth elements yttrium, gadolinium, and samarium at ℃, stir and melt the alloy to homogenize the alloy, and then skim off scum to obtain alloy liquid. The alloy liquid is refined at 770°C for 30 minutes and cast to obtain a high-strength rare earth deformed magnesium alloy.

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Abstract

The invention discloses a high-strength rare earth wrought magnesium alloy and a preparation method thereof. The high-strength rare earth wrought magnesium alloy comprises, by mass, 6%-9% of Al, 1.5%-2.5% of Nd, 0.2%-1.5% of Zn, 0.3%-2.0% of Si, 1.2%-2.5% of Zr, 5%-7% of Y, 5%-7% of Gd, 1%-5% of Sm, and the balance Mg and inevitable impurities, wherein (Y+Gd): Sm is equal to 2.8-14; According to the high-strength rare earth wrought magnesium alloy and the preparation method thereof, by adding aluminum, silicon, zinc and various rare earth elements into magnesium alloy raw materials, the tensile strength of the magnesium alloy raw materials is greater than 450 MPa, the elastic modulus of the magnesium alloy raw materials is greater than 55 GPa, the requirements for high strength and high elastic modulus of magnesium alloy in the prior art can be met, and the high-strength rare earth wrought magnesium alloy has the wider application field.

Description

technical field [0001] The present application relates to the technical field of magnesium alloys, in particular to a high-strength rare earth deformed magnesium alloy and a preparation method thereof. Background technique [0002] As a new type of lightweight metal material, magnesium alloy has a series of advantages such as low density, high specific strength, impact resistance, and recyclability, and has broad application prospects. Especially with the rapid development of transportation fields such as aviation and high-speed rail and military fields such as aerospace, the demand for high-strength wrought magnesium alloys is becoming increasingly urgent. [0003] At present, only AZ80 (Mg-8Al-0.4Zn) and ZK60 (Mg-6Zn-0.5Zr) are the main high-strength wrought magnesium alloys used. Their tensile strength after deformation + aging heat treatment is about 300-350MPa, and the elongation at room temperature is 8%, while the tensile strength of aluminum alloys currently used as...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/02C22F1/06
CPCC22C23/06C22C1/02C22F1/06
Inventor 张俊张劲
Owner 湖南镁卓新材料科技有限公司
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