High-strength semi-solid double-phase die-casting magnesium-lithium alloy and preparation method thereof

A semi-solid and lithium alloy technology, which is applied in the field of high-strength semi-solid two-phase die-casting magnesium-lithium alloy and its preparation, can solve the problem of narrow temperature range of solid-liquid two-phase region, low mechanical properties of as-cast magnesium-lithium alloy, low ignition point, etc. problems, to achieve the effect of widening the temperature range, improving the mechanical properties of the as-cast state, and shortening the preparation process

Active Publication Date: 2021-04-02
郑州轻研合金科技有限公司
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  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of low mechanical properties, narrow temperature range of solid-liquid two-phase region and low ignition point of as-cast magnesium-lithium alloy, the present invention obtains a low-cost High-strength semi-solid dual-phase die-casting magnesium-lithium alloy with high flame retardancy

Method used

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  • High-strength semi-solid double-phase die-casting magnesium-lithium alloy and preparation method thereof
  • High-strength semi-solid double-phase die-casting magnesium-lithium alloy and preparation method thereof
  • High-strength semi-solid double-phase die-casting magnesium-lithium alloy and preparation method thereof

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Embodiment 1

[0026] A high-strength semi-solid dual-phase die-casting magnesium-lithium alloy, mainly composed of the following components in mass percentage: Li 8%, Al 7%, Zn 1%, Ca 3%, the mass ratio of Al to Ca is 2.33:1, and the rest The amount is Mg and other unavoidable impurity elements; among them, the impurity element Na content is less than 0.001%, each of the other impurity elements is less than 0.05%, and the total amount of other impurity elements is less than 0.3%.

[0027] The preparation method of the high-strength semi-solid dual-phase die-casting magnesium-lithium alloy includes three stages of vacuum smelting, ingot blanking and cutting, and semi-solid die-casting. The specific steps are as follows:

[0028] (1) Melting and pouring: batching is carried out according to the mass percentage of each component in the alloy. After batching, a vacuum furnace is used for alloy melting. During the melting process, the vacuum degree in the vacuum furnace is first pumped to 0.5Pa, ...

Embodiment 2

[0032] A high-strength semi-solid dual-phase die-cast magnesium-lithium alloy, mainly composed of the following components in mass percentage: Li7.5%, Al 8%, Zn 1%, Ca 2.5%, the mass ratio of Al to Ca is 3.2:1, The balance is Mg and other unavoidable impurity elements, wherein the impurity element Na content is less than 0.001%, each of the other impurity elements is less than 0.05%, and the total amount of other impurity elements is less than 0.3%.

[0033] The preparation method of the high-strength semi-solid dual-phase die-casting magnesium-lithium alloy includes three stages of vacuum smelting, ingot blanking and cutting, and semi-solid die-casting. The specific steps are as follows:

[0034] (1) Melting and pouring: batching is carried out according to the mass percentage of each component in the alloy. After batching, the alloy is melted in a vacuum furnace. Pure argon, followed by heating, when the metal is completely melted, the temperature is raised to 740°C for 8 mi...

Embodiment 3

[0038]A high-strength semi-solid dual-phase die-casting magnesium-lithium alloy, mainly composed of the following components in mass percentage: Li8.5%, Al 7.5%, Zn 1.2%, Ca 2.0%, the mass ratio of Al to Ca is 3.75:1, The balance is Mg and other unavoidable impurity elements, among which the impurity element Na content is less than 0.001%, each of the other impurity elements is less than 0.05%, and the total amount of other impurity elements is less than 0.3%.

[0039] The preparation method of the high-strength semi-solid dual-phase die-casting magnesium-lithium alloy includes three stages of vacuum smelting, ingot blanking and cutting, and semi-solid die-casting. The specific steps are as follows:

[0040] (1) Melting and pouring: batching is carried out according to the mass percentage of each component in the alloy. After batching, a vacuum furnace is used for alloy melting. During the melting process, the vacuum degree in the vacuum furnace is first pumped to 1.3Pa, and th...

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Abstract

The invention belongs to the technical field of preparation of magnesium-lithium alloy materials, and particularly relates to a high-strength semi-solid double-phase die-casting magnesium-lithium alloy and a preparation method thereof. Aiming at the problems that an as-cast magnesium-lithium alloy is low in mechanical property, narrow in temperature interval of a solid-liquid double-phase region and low in ignition point, the high-strength semi-solid double-phase die-casting magnesium-lithium alloy low in cost and high in flame retardance is obtained through the means of alloy component design, vacuum casting, semi-solid die-casting forming and the like. The preparation method of the high-strength semi-solid double-phase die-casting magnesium-lithium alloy is a near-net forming technology,the preparation technological process is short, the cost is controllable, and batch production of magnesium-lithium alloy parts can be achieved. By means of the alloy, a magnesium-lithium alloy product with the tensile strength not lower than 230 MPa, the yield strength not lower than 180 MPa and the elongation not lower than 15% can be obtained. The high-strength semi-solid magnesium-lithium alloy can be applied in batch in the fields of 3C, optics, precision electronic products and the like.

Description

technical field [0001] The invention belongs to the technical field of magnesium-lithium alloy material preparation, and in particular relates to a high-strength semi-solid two-phase die-casting magnesium-lithium alloy and a preparation method thereof. Background technique [0002] As the lightest metal structural material so far, magnesium-lithium alloy is one of the most ideal structural materials for lightweight components. In addition to the advantages of high specific strength and specific stiffness, the alloy also has the advantages of excellent machinability, good electromagnetic shielding ability and excellent shock resistance. It has broad applications in the fields of aerospace, rail transit and 3C electronic products. Application prospects. However, at present, the amount of magnesium-lithium alloys is relatively small, low absolute strength, and high material prices are the main reasons that limit the further development and application of magnesium-lithium allo...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/02C22C1/02B22D17/00
CPCC22C23/00C22C23/02C22C1/02B22D17/007
Inventor 解海涛张瑷月肖阳刘志鹏刘金学高华李吴铭赵斌
Owner 郑州轻研合金科技有限公司
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