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A kind of rare earth magnesium alloy and preparation method thereof

A rare earth magnesium and alloy technology, applied in the field of rare earth magnesium alloy and its preparation, can solve the problems of low solid solubility, inability to form solid solution, aging strengthening effect, etc.

Active Publication Date: 2021-08-17
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid solubility of cerium-rich mixed rare earths in magnesium is low, and it cannot form a good solid solution and aging strengthening effect

Method used

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  • A kind of rare earth magnesium alloy and preparation method thereof
  • A kind of rare earth magnesium alloy and preparation method thereof
  • A kind of rare earth magnesium alloy and preparation method thereof

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preparation example Construction

[0058] The present invention also provides a preparation method of a rare earth magnesium alloy, comprising the following steps:

[0059] A) melting the preheated magnesium ingot in the flux;

[0060] B) After adding zinc ingots and metal Bi to the molten melt in step A), raise the temperature to above 740°C; add Gd source, Y source, Er source, Ho source, Dy source and La source in batches, and mix well Raise the temperature to above 760°C; then add Zr source, mix well, and refine in an argon atmosphere;

[0061] C) cooling the melt after refining, and casting it into an ingot under the condition of shielding gas;

[0062] D) carrying out solid solution treatment to the ingot;

[0063] E) performing heat deformation treatment on the ingot after the solution treatment to obtain a rare earth magnesium alloy.

[0064] In the present invention, the preheated magnesium ingot is first melted in the flux. Preferably, specifically include:

[0065] Preheating the magnesium ingot ...

Embodiment 1

[0111] According to Gd 9.2wt%, Y 2.1wt%, Er 0.2wt%, Ho 0.1wt%, Dy 0.1wt%, La 0.2wt%, Zn 0.9wt%, Bi 0.2wt%, Zr 0.6wt%, the balance is Mg The composition ratio of preparing the total weight is 2 tons of raw materials. The raw materials include magnesium source (magnesium ingot with a purity of 99.95%), Gd source, Y source, Er source, Ho source, Dy source and La source. Mg-Y-rich master alloy of Y, Er, Ho, Dy, La and Mg (the content of Gd is 3.45wt%, the content of Y is 14.92wt%, the content of Er is 1.21wt%, the content of Ho is 0.62wt% , the content of Dy is 0.53wt%, the content of La is 1.46wt%, the total rare earth content is 23%, the Mg of the balance), Zn source (purity is the zinc ingot of 99.99%), Bi source (chemically pure metal Bi) And Zr source (Mg-Zr master alloy, the content of Zr is 30wt%), and raw material is preheated to 120 ℃;

[0112] (2) Preheat the iron crucible to 200°C, add magnesium source, and add No. 5 flux to cover to prevent excessive oxidation of magn...

Embodiment 2

[0120] (1) According to Gd 6wt%, Y 4wt%, Er 0.5wt%, Ho 0.25wt%, Dy 0.25wt%, La0.5wt%, Zn 0.5wt%, Bi 0.01wt%, Zr 0.3wt%, the balance is The composition ratio of Mg, the raw material that prepares gross weight is 2 tons, raw material comprises magnesium source (purity is the magnesium ingot of 99.95%), Gd source (Mg-Gd master alloy, Gd content is 23wt%), Y source (Mg- Y master alloy, Y content is 20wt%), Er source (Mg-Er master alloy, Er content is 20wt%), Ho source (Mg-Ho master alloy, Ho content is 20wt%), Dy source (Mg-Dy intermediate Alloy, Dy content is 20wt%), La source (Mg-La master alloy, La content is 20wt%), Zn source (zinc ingot with a purity of 99.99%), Bi source (chemically pure metal Bi) and Zr source (Mg -Zr master alloy, the content of Zr is 30wt%), and the raw material is preheated to 160 ℃;

[0121] (2) Preheat the iron crucible to 300°C, add magnesium source, and add No. 5 flux to cover to prevent excessive oxidation of magnesium at high temperature;

[0122...

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Abstract

The invention relates to the technical field of rare earth magnesium alloy materials, in particular to a rare earth magnesium alloy and a preparation method thereof. The rare earth magnesium alloy provided by the invention comprises: Gd 6wt%-12wt%; Y 1wt%-4wt%; Er 0.01wt%-0.5wt%; Ho 0.01wt%-0.25wt%; Dy 0.01wt%-0.25wt% 0.01wt% to 0.5wt% of La; 0.5wt% to 1.3wt% of Zn; 0.01wt% to 0.5wt% of Bi; 0.3wt% to 0.9wt% of Zr; The rare earth magnesium alloy provided by the invention utilizes the interaction of rare earth elements in the magnesium alloy to significantly refine alloy grains, promote the precipitation of strengthening phases, and significantly improve the room temperature and high temperature mechanical properties of the alloy after thermal deformation.

Description

technical field [0001] The invention relates to the technical field of rare earth magnesium alloy materials, in particular to a rare earth magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium is currently the lightest metal structural material that can be practically applied, with a density of only 1.74g / cm 3 , is 2 / 3 of aluminum and 1 / 4 of iron. Magnesium alloys have great application potential in aerospace, national defense, transportation and other fields, and have achieved large-scale practical applications. Especially in the fields of aerospace and automobiles, according to the data of the National Aeronautics and Space Administration (NASA), every 1kg weight loss of a spacecraft can save nearly 100,000 US dollars. Experiments have proved that if the weight of a car is reduced by 10%, the fuel consumption can be reduced by 6%-8%. In other words, if the weight of the car is reduced by 100 kg, the fuel consumption per 100 kilometers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/002C22F1/06
Inventor 邱鑫孟繁智杨强孟健王楠孙伟田政吕术慧
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI