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High bulging and high impact resistance magnesium alloy sheet and preparation method thereof

A technology of high impact resistance and magnesium alloy, applied in metal rolling, metal rolling, metal processing equipment, etc. The problem of high texture strength of the basal plane can achieve the effect of avoiding waste of resources and insufficient performance, large normal stress, and enhanced grain boundary strength

Active Publication Date: 2022-04-05
天津市金镁轮科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, magnesium alloy has a close-packed hexagonal crystal structure, which has few slip systems at room temperature, high basal texture strength, and extremely poor plasticity. When the external load exceeds the elastic range, the magnesium alloy withstands low-speed bulging and absorbs high-speed impact energy. The capacity is far inferior to aluminum alloys of the same strength, and cannot be used safely, causing unnecessary losses
[0003] At present, a variety of methods have been tried to improve the bulging and impact resistance of magnesium alloys at home and abroad, such as adding a large amount of rare earth elements to prepare high-alloyed magnesium alloys, using severe plastic deformation to prepare ultra-fine-grained magnesium alloys, and using ultra-low temperature deformation to refine However, these methods only increase the strength of the magnesium alloy, while ignoring the improvement of the plasticity, the resulting magnesium alloy has a small improvement in impact resistance, and the bulging property decreases instead.
Some researchers have also proposed to use shear deformation to weaken the texture or coarsen the grains to improve the plasticity of magnesium alloys. Although these methods help to improve the bulging properties of magnesium alloys, they will cause a decrease in strength and seriously damage the impact resistance.
It can be seen that there is currently no effective method to simultaneously enhance the bulging and impact resistance of magnesium alloys.

Method used

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  • High bulging and high impact resistance magnesium alloy sheet and preparation method thereof
  • High bulging and high impact resistance magnesium alloy sheet and preparation method thereof
  • High bulging and high impact resistance magnesium alloy sheet and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] A magnesium alloy with high bulging property and high impact resistance contains 0.2% Co and 0.9% Zr by mass %, and the balance is Mg and unavoidable impurities, wherein the mass percentage ratio of Co to Zr is 0.22.

[0045] A magnesium alloy with high bulging property and high impact resistance of the present embodiment comprises the following steps:

[0046] The raw material is Mg-0.2Co-0.9Zr (mass percentage), cast into a magnesium alloy ingot billet, processed into a 5mm thick plate, and homogenized annealing; heat the plate to 250°C and roll to 550°C, and wait for the plate and roll Continuous rolling is carried out after uniform temperature, the reduction in each pass is 10%, and the total reduction is 30%. After the rolling, the plate is directly water quenched and subjected to stress relief annealing.

Embodiment 2

[0055] A magnesium alloy with high bulging property and high impact resistance contains 0.2% Sb and 0.2% Ca in mass percent, and the balance is Mg and unavoidable impurities, wherein the mass ratio of Sb to Ca is 1.

[0056] A preparation method of the high bulging and high impact resistance magnesium alloy of the present embodiment comprises the following steps:

[0057] According to the raw material Mg-0.2Sb-0.2Ca (mass percentage), cast a magnesium alloy ingot billet, process it into a 10mm thick plate, and homogenize annealing; heat the plate to 100°C and the roll to 450°C, and wait for the plate and the roll to be uniform After warming, continuous rolling is carried out, the reduction in each pass is 10%, and the total reduction is 60%. After the rolling, the plate is directly water quenched and subjected to stress relief annealing.

Embodiment 3

[0059] A magnesium alloy with high bulging property and high impact resistance, which contains 0.2% Sb, 0.1% Ca and 0.1% Zr by mass %, and the balance is Mg and unavoidable impurities, wherein the total mass percentage of Ca and Zr is 0.2% %, the mass ratio of Sb to the total amount of Ca and Zr is 1.

[0060] A kind of preparation method of the high bulging property high impact resistance magnesium alloy of this embodiment, the difference with embodiment 2 only lies in, the material composition is different, the raw material composition is Mg-0.2Sb-0.1Ca-0.1Zr ( mass percent).

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Abstract

The invention provides a magnesium alloy plate with high bulging property and high impact resistance, which contains 0.05-1.0% of element X and 0.2-2.0% of element Y in terms of mass %, and the element X is cobalt, indium, manganese, antimony and One or more of strontium, element Y is one or more of calcium, zirconium and rare earth, and the mass ratio of element X to said element Y is less than 1; the present invention also provides a high expansion A method for preparing a magnesium alloy plate with high shape and high impact resistance. The magnesium alloy of the present invention has a symmetrical gradient microstructure. From the middle of the plate to the surface, the grain size gradually increases, and the texture strength gradually weakens. It has high bulging and high impact resistance. The process design of the method of the present invention is reasonable , Simple equipment requirements, convenient operation, low cost, high efficiency, can stably prepare a magnesium alloy with a gradient microstructure symmetrical along the plate thickness, high bulging and high impact resistance.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal materials and processing technology. The invention relates to a magnesium alloy plate with high bulging and high impact resistance and a preparation method thereof, in particular to a microstructure containing a symmetrical gradient structure along the thickness direction, and having A method for preparing a microalloyed magnesium alloy plate with high bulging and high impact resistance. Background technique [0002] Magnesium alloy is currently the lightest metal structure material and is known as "the green energy material of the 21st century". Its excellent damping and shock absorption performance is almost 100 times that of aluminum alloy in the elastic range. Rail train casings have broad application prospects. However, magnesium alloy has a close-packed hexagonal crystal structure, which has few slip systems at room temperature, high basal texture strength, and extremely poor plasticity. Wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06C21D9/00C22C23/00C22C23/06B21B37/56B21B37/74B21B45/00
CPCC22F1/06C21D9/0081C22C23/00C22C23/06B21B45/004B21B37/74B21B37/56
Inventor 霍庆欢冯慧娟
Owner 天津市金镁轮科技有限公司
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