A kind of magnesium-lithium alloy and its preparation method and the preparation method of magnesium-lithium alloy plate

A magnesium-lithium alloy and alloy technology, applied in the preparation of magnesium-lithium alloy plates, magnesium-lithium alloys and their preparation, can solve problems such as overaging, poor thermal stability of β single-phase magnesium-lithium alloys, etc., to control production costs and avoid Oxidation inclusions and solvent inclusions, the effect of reducing power consumption

Active Publication Date: 2016-11-23
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a magnesium-lithium alloy and its preparation method that can overcome the poor thermal stability of β-single-phase magnesium-lithium alloys and the problems of overaging, and to prepare magnesium-lithium alloy plates using the magnesium-lithium alloy Methods

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  • A kind of magnesium-lithium alloy and its preparation method and the preparation method of magnesium-lithium alloy plate
  • A kind of magnesium-lithium alloy and its preparation method and the preparation method of magnesium-lithium alloy plate
  • A kind of magnesium-lithium alloy and its preparation method and the preparation method of magnesium-lithium alloy plate

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Experimental program
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Effect test

Embodiment 1

[0047] Component distribution (weight percent): 14% Li; 3.0% Al; 1.0% Sr; 0.3% Sc; 0.4% Zr;

[0048] (1) Industrial pure Mg ingots (Shanxi Wenxi Yinguang Magnesium Industry Group Company, purity ≥ 99.5%), industrial pure Al ingots (Shanghai Yuhang Aluminum Company, purity > 99.7%), pure Li ingots (Guangzhou Jingyuan Trading Co., Ltd., purity > 99%), Mg-10Sc alloy (Yueyang Yuhua Metallurgical New Material Company, where the value is mass percent), Mg-30Zr alloy (Yueyang Yuhua Metallurgical New Material Company, where the value is mass percent ) and Mg-15Sr alloy (Yueyang Yuhua Metallurgical New Materials Co., Ltd., wherein the numerical values ​​are mass percentages) are weighed according to the above-mentioned composition ratio;

[0049] (2) Heat pure Mg ingots, pure Li ingots, and pure Al ingots in a vacuum resistance furnace (Shenyang Vacuum Technology Research Institute, VIF type) to 720 ° C for melting, then add Mg-10Sc alloy, Mg-30Zr alloy and Mg- For 15Sr alloy, before ...

Embodiment 2

[0059] Component distribution (weight percent): 12% Li; 5.0% Al; 0.8% Sr; 0.6% Sc; 0.4% Zr;

[0060] (1) Industrial pure Mg ingots (Shanxi Wenxi Yinguang Magnesium Industry Group Company, purity ≥ 99.5%), industrial pure Al ingots (Shanghai Yuhang Aluminum Company, purity > 99.7%), pure Li ingots (Guangzhou Jingyuan Trading Co., Ltd., purity > 99%), Mg-10Sc alloy (Yueyang Yuhua Metallurgical New Material Company, where the value is mass percent), Mg-30Zr alloy (Yueyang Yuhua Metallurgical New Material Company, where the value is mass percent ) and Mg-15Sr alloy (Yueyang Yuhua Metallurgical New Materials Co., Ltd., wherein the numerical values ​​are mass percentages) are weighed according to the above-mentioned composition ratio;

[0061] (2) Heat pure Mg ingots, pure Li ingots, and pure Al ingots in a vacuum resistance furnace (Shenyang Vacuum Technology Research Institute, VIF type) to 730 ° C for melting, then add Mg-10Sc alloy, Mg-30Zr alloy and Mg- For 15Sr alloy, before ...

Embodiment 3

[0067] Component distribution (weight percent): 12% Li; 3.0% Al; 1.2% Sr; 0.5% Sc; 0.5% Zr;

[0068] (1) Industrial pure Mg ingots (Shanxi Wenxi Yinguang Magnesium Industry Group Company, purity ≥ 99.5%), industrial pure Al ingots (Shanghai Yuhang Aluminum Company, purity > 99.7%), pure Li ingots (Guangzhou Jingyuan Trading Co., Ltd., purity > 99%), Mg-10Sc alloy (Yueyang Yuhua Metallurgical New Material Company, where the value is mass percent), Mg-30Zr alloy (Yueyang Yuhua Metallurgical New Material Company, where the value is mass percent ) and Mg-15Sr alloy (Yueyang Yuhua Metallurgical New Materials Co., Ltd., wherein the numerical values ​​are mass percentages) are weighed according to the above-mentioned composition ratio;

[0069] (2) Heat pure Mg ingots, pure Li ingots, and pure Al ingots in a vacuum resistance furnace (Shenyang Vacuum Technology Research Institute, VIF type) to 740 ° C for melting, then add Mg-10Sc alloy, Mg-30Zr alloy and Mg- For 15Sr alloy, before ...

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Abstract

The invention discloses a magnesium-lithium alloy, a preparation method thereof, and a preparation method of a magnesium-lithium alloy plate, wherein the magnesium-lithium alloy is composed of the following components by weight percentage: 10% to 15% of Li; 3% to 6% of Al ; 0.3% to 2.0% of Sr; 0.05% to 1.0% of Sc; 0.05 to 0.5% of Zr; limiting impurity elements Fe≦0.005%, Ni≦0.002%, Cu≦0.02%; the rest is Mg. The magnesium-lithium alloy provided by the present invention not only improves the heat resistance of the alloy through the addition of elements Sr and Sc, but also effectively overcomes the significant reduction in the mechanical properties of the alloy due to overaging of the β-phase magnesium-lithium alloy, and the Al 3 The enrichment of Sc at the solid-liquid interface can hinder the growth of dendrites, thereby refining the as-cast structure of the alloy, because the Al 3 The Sc phase is mostly distributed in the grain boundary, which has a strong pinning effect on the grain boundary, and can significantly improve the yield strength and tensile strength of the alloy.

Description

technical field [0001] The invention relates to the field of ultra-light and high-strength metal alloys, in particular to a magnesium-lithium alloy, a preparation method thereof, and a preparation method of a magnesium-lithium alloy plate. Background technique [0002] Magnesium-lithium alloy is currently the lightest metal structural material. This alloy has the characteristics of low density, high specific strength and specific stiffness, good plasticity and high damping performance. It is one of the most promising alloys for the development of ultra-light and high-strength alloys. According to the phase diagram of the magnesium-lithium binary alloy, when the lithium content exceeds 5.7wt%, in addition to the α phase of the hcp structure, the β phase of the bcc structure will also appear in the structure of the magnesium-lithium alloy. When the lithium content is greater than 10.3wt%, the matrix structure of the alloy is β solid solution with bcc structure. Due to the app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/02
Inventor 李坊平魏庆丰张丽芳马涛崔凯
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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