A kind of magnesium-rare earth alloy with high rolling formability and preparation method thereof

A technology of rare earth alloys and magnesium alloys, applied in the field of magnesium-rare earth alloys with high rolling forming capacity and its preparation, can solve the problems of affecting the hot forming properties of alloys, reducing the elongation of alloys, and unfavorable general applications, etc., so as to achieve easy operation , Conducive to hot rolling processing, high elongation effect

Inactive Publication Date: 2017-11-07
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, this method of strengthening the alloy will inevitably reduce the elongation of the alloy and affect the hot forming performance of the alloy, especially the rolling forming ability of the magnesium-rare earth alloy containing W phase.
[0004] Mg-Gd-Y series magnesium alloy has excellent mechanical properties, but due to its high cost, it is not conducive to general application

Method used

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  • A kind of magnesium-rare earth alloy with high rolling formability and preparation method thereof
  • A kind of magnesium-rare earth alloy with high rolling formability and preparation method thereof
  • A kind of magnesium-rare earth alloy with high rolling formability and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The chemical composition (mass percentage) of the alloy is: 5.1% Gd, 2.6% Y, 2.1% Zn, 1.0Al, the total amount of impurity elements Fe, Cu, Ni, Si is less than 0.03%, and the balance is Mg.

[0024] The casting and rolling process for preparing the alloy is as follows: first, weigh the material according to the proportion, preheat the Mg, Zn, Al, Mg-Gd master alloy, and Mg-Y master alloy to 200°C, and then put Mg into the preheated to 100°C In the crucible, and into the SF 6 :CO 2 Protective gas with a volume ratio of 1:100, add Zn after the Mg is completely melted, add Mg-Y master alloy and Mg-Gd master alloy when the melt temperature reaches 740°C, and pass in argon after the added master alloy is melted Refining and stirring for 10 minutes, after removing the slag, let it stand at 740°C for 25 minutes, and after the temperature drops to 700°C, cast it into a flat ingot with a metal mold. The resulting slab was air-cooled after homogenization treatment at 450°C for 1...

Embodiment 2

[0026] The chemical composition (mass percentage) of the alloy is: 5.0% Gd, 2.8% Y, 2.0% Zn, 0.9Al, the total amount of impurity elements Fe, Cu, Ni, Si is less than 0.03%, and the balance is Mg.

[0027] The casting and rolling process for preparing the alloy is as follows: first, weigh the materials according to the proportion, preheat Mg, Zn, Al, Mg-Gd master alloy, and Mg-Y master alloy to 200°C, and then put Mg into the In the melting furnace, add Zn and Al after the Mg is completely melted, and add Mg-Gd master alloy and Mg-Y master alloy when the melt temperature reaches 750°C. After the added master alloy is melted, pass in argon gas for refining and stirring for 15 minutes. After removing the slag, let it stand at 740°C for 30 minutes, and after the temperature drops to 720°C, use the electromagnetic continuous casting method to obtain a cylindrical billet. Electromagnetic continuous casting process parameters are: power supply 10kW, power frequency 2000Hz, stable cas...

Embodiment 3

[0029] The chemical composition (mass percentage) of the alloy is: 5.0% Gd, 2.7% Y, 2.0% Zn, 1.0Al, the total amount of impurity elements Fe, Cu, Ni, Si is less than 0.03%, and the balance is Mg.

[0030] The casting and rolling process for preparing the alloy is as follows: first, weigh the materials according to the proportion, preheat Mg, Zn, Al, Mg-Gd master alloy, and Mg-Y master alloy to 200°C, and then put Mg into the In the melting furnace, add Zn and Al after the Mg is completely melted, and add Mg-Gd master alloy and Mg-Y master alloy when the melt temperature reaches 750°C. After the added master alloy is melted, pass in argon gas for refining and stirring for 15 minutes. After removing the slag, let it stand at 740°C for 30 minutes, and after the temperature drops to 720°C, adopt the ordinary continuous casting method to obtain a cylindrical billet. The continuous casting process parameters are: the stable casting rate is 8cm / min, the cooling water volume is 1.5m ...

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Abstract

The invention provides a high-rolling-capacity magnesium-rare earth alloy and a preparation method thereof. The magnesium-rare earth alloy comprises the following elements in percentage by mass: 4.8-5.2% of Gd, 2.3-2.8% of Y, 1.9-2.3% of Zn, 0.8-1.2% of Al, inevitable impurities of Fe, Cu, Ni and Si less than 0.03%, and the balance of Mg. The preparation method comprises the following steps: pure Mg, pure Zn, pure Al, a Mg-Gd intermediate alloy and a Mg-Y intermediate alloy are used as raw materials, are molten for stirring, refining and slagging, are cooled after insulation and standing, and are cast as a magnesium alloy cast blank or magnesium alloy ingot; and the magnesium alloy cast blank or magnesium alloy ingot is hotly rolled on a rolling mill to prepare the magnesium-rare earth alloy after homogenization. The novel low-cost and high-rolling-capacity magnesium-rare earth alloy, provided by the invention, is excellent in comprehensive mechanical performance, and can serve as a high-strength structural material for use.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a magnesium-based alloy and a preparation method thereof, in particular to a magnesium-rare earth alloy with high rolling forming capacity and a preparation method thereof. Background technique [0002] Rare earth elements have a unique role in the field of metallurgy and materials due to their unique arrangement of extranuclear electrons. They have the functions of purifying alloy solutions, improving alloy structures, improving the mechanical properties of alloys at room temperature and high temperature, and enhancing the corrosion resistance of alloys. Therefore, magnesium-rare earth alloys have the inherent advantages of magnesium alloys, such as low density, high specific strength, and metallic luster, and at the same time have new characteristics of high heat resistance and excellent creep properties. [0003] Due to the strengthening effect of rare earth phases, magnes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06
CPCC22C23/06
Inventor 房灿峰刘光旭张路闻志恒郝海孟令刚张兴国
Owner DALIAN UNIV OF TECH
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