Wrought magnesium alloy and preparation method thereof

A technology of deformed magnesium alloy and magnesium alloy, which is applied in the field of metal materials, can solve the problems of poor plasticity, poor processing and forming performance, and insufficient comprehensive performance of deformed magnesium alloy, so as to achieve the improvement of hardness and toughness, which is beneficial to processing and forming, and refinement grain effect

Active Publication Date: 2013-10-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to solve the technical problems that the comprehensive performance of the deformed magnesium alloy in the prior art is not good enough, especially the poor plasticity and poor post-processing performance.

Method used

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  • Wrought magnesium alloy and preparation method thereof
  • Wrought magnesium alloy and preparation method thereof
  • Wrought magnesium alloy and preparation method thereof

Examples

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preparation example Construction

[0024] The preparation method of the deformed magnesium alloy of the present invention adopts the existing smelting process of material preparation→melt alloying→refining→casting to carry out magnesium alloy smelting to prepare the above deformed magnesium alloy, and then perform homogenization annealing at a temperature of 350-450°C for 8-14h After treatment, the grains are all fine equiaxed grains, with an average grain size of about 10-30 μm, and the grain size after subsequent extrusion into products can reach 1 μm. The steps in the preparation of wrought magnesium alloys are described in detail as follows:

[0025] Step 1, raw material preparation: 1) Raw materials: pure magnesium ingot (purity ≥ 99.9wt%), pure aluminum ingot (purity ≥ 99.9wt%), pure zinc ingot (purity ≥ 99.9wt%), (note: Unless otherwise specified, the alloy components used in the present invention are mass percent (wt%), aluminum-manganese master alloy ingot, and pure scandium ingot (purity ≥ 99.9wt%) an...

Embodiment 1

[0041] The preparation method of the wrought magnesium alloy of embodiment 1 of the present invention comprises the following steps:

[0042] 1. Drying: Prepare the prepared raw materials: magnesium ingot (purity ≥99.9wt%), aluminum ingot (purity ≥99.9wt%), zinc ingot (purity ≥99.9wt%), aluminum-manganese master alloy ingot, and scandium ingot (purity ≥ 99.9wt%) is dried, wherein magnesium ingots, aluminum ingots, and zinc ingots are dried at a temperature of 100°C, while aluminum-manganese master alloy ingots and scandium ingots are dried at a temperature of 150°C.

[0043] 2. Melting: During the whole melting process, continuously feed SF into the resistance crucible 6 Gas protection, first preheat the resistance crucible to 300 ° C, sprinkle an appropriate amount of refining agent RJ-5 and covering agent RJ-6 on the side wall and bottom of the crucible, and then put in the weighed magnesium ingots, aluminum ingots, zinc Ingot, continue heating, after the magnesium ingot, a...

Embodiment 2

[0045] The raw materials and preparation method are basically the same as those in Example 1, the only difference is that the addition of pure scandium ingot is 1wt%, and the magnesium alloy ingot A2 is obtained.

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Abstract

The invention relates to wrought magnesium alloy, which comprises the following ingredients in percentage by weight: 6.15 percent to 6.84 percent of Al, 1.05 percent to 1.36 percent of Zn, 0.20 percent to 0.45 percent of Mn, 0.50 percent to 1.50 percent of Sc and the balance Mg. The invention also relates to a preparation method of the wrought magnesium alloy. The wrought magnesium alloy and the preparation method have the advantages that the rare earth element Sc is adopted for modification treatment on the wrought magnesium alloy, the effects of refining crystal grains and improving the alloy tissue can be reached, through mechanical performance detection, the intensity, the plasticity, the hardness and the toughness of the wrought magnesium alloy are all improved through being compared with those of the magnesium alloy without the rare earth element Sc, and the later period processing formation is favorably realized.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a deformed magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is the lightest of all structural metal materials, with a density of 1.75-1.90g / cm 3 , only 2 / 3 of aluminum alloy, 1 / 4 of steel. Compared with other metal structural materials, magnesium alloy has a series of advantages such as high specific strength, specific stiffness, shock absorption, electromagnetic shielding and radiation resistance, easy cutting, easy recycling, etc. It is used in automobiles, electronic appliances, communications, The aerospace and national defense military industry has extremely important application value and broad application prospects. It is the third type of metal structural material developed after steel and aluminum alloy. [0003] Those skilled in the art know that magnesium has a close-packed hexagonal crystal structure, less slip ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/03
Inventor 李绍青
Owner BYD CO LTD
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