A kind of mg-mn deformed magnesium alloy and its preparation method

A technology for deforming magnesium alloys and magnesium alloys, applied in the field of metal materials, can solve the problems of alloying element Zr burning, unfavorable development and application, and high price of rare earths, etc., to achieve refined structure, excellent plastic processing performance, strength and toughness Good results

Active Publication Date: 2016-05-11
CHONGQING UNIV
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  • Application Information

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Problems solved by technology

At present, the widely used AZ series magnesium alloys containing Al have excellent room temperature performance, but poor high temperature stability; while the ZK series magnesium alloys containing Zn and Zr have good high temperature stability, but the burning of the alloying element Zr during the smelting process serious damage, resulting in high cost, which is not conducive to further development and application; magnesium alloys containing rare earth elements (RE) have excellent room temperature ductility (Mg-RE binary magnesium alloy) and high service strength (Mg-RE -Zn series magnesium alloy), but because rare earths are expensive, they are mostly used in high-end industries such as military industry, and rare earth resources are getting less and less, and their prices are getting more and more expensive.

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  • A kind of mg-mn deformed magnesium alloy and its preparation method

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specific Embodiment

[0016] A new type of Mg-Mn deformed magnesium alloy, the composition content of which is: Mn0.20-5.00wt.%, the rest is Mg and unavoidable impurities. (Ingredient unit in Table 1 is wt.%). Specific examples are as follows:

[0017] Table 1:

[0018]

[0019] 2. The preparation method of the novel Mg-Mn wrought magnesium alloy is as follows.

Embodiment 1

[0021] A method for preparing a Mg-Mn wrought magnesium alloy, comprising the steps of:

[0022] 1. Using magnesium-manganese master alloy (wherein the content ratio of magnesium to manganese is 19:1) and industrial pure magnesium Mg as raw materials, the formula according to the embodiment is industrial pure manganese Mn0.5%, and the balance is industrial pure magnesium Mg, calculate and weigh Take two ingredients.

[0023] 2. Under the protection of the covering agent, first smelt the industrial pure magnesium at 720°C to 750°C. After it is completely melted and the temperature rises to 750°C and stabilizes, add the magnesium-manganese master alloy preheated to 150°C, and Add refining agent and stir thoroughly for 3-6 minutes, let the melt stand at 750°C for 20-30 minutes, remove the scum on the surface, and pour it into an iron mold preheated to 250-350°C at 750°C , to prepare a magnesium alloy ingot.

[0024] 3. Cover the prepared magnesium alloy ingot with graphite, hom...

Embodiment 2

[0028] A method for preparing a Mg-Mn wrought magnesium alloy, comprising the steps of:

[0029] 1. Using magnesium-manganese master alloy (wherein, the manganese content is less than 10%) and industrial pure magnesium Mg as raw materials, according to the embodiment formula is industrial pure manganese Mn1.0%, and the balance is industrial pure magnesium Mg, calculate and weigh Take two ingredients.

[0030] 2. Under the protection of the covering agent, first smelt the industrial pure magnesium at 720°C to 750°C. After it is completely melted and the temperature rises to 750°C and stabilizes, add the magnesium-manganese master alloy preheated to 150°C, and Add refining agent and stir thoroughly for 3-6 minutes, let the melt stand at 750°C for 20-30 minutes, remove the scum on the surface, and pour it into an iron mold preheated to 250-350°C at 750°C , to prepare a magnesium alloy ingot.

[0031] 3. Cover the prepared magnesium alloy ingot with graphite, homogenize it at 50...

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Abstract

The invention provides a Mg-Mn deformed magnesium alloy and a preparation method thereof, which belong to the field of magnesium alloy design, and its raw material components and mass percentages are: industrial pure manganese 0.2% to 5.0%; the rest is industrial pure magnesium and unavailable Avoid impurities. The preparation steps are as follows: first melting magnesium, then adding magnesium-manganese master alloy, stirring and refining, pouring into ingots, then performing homogenization heat treatment on the ingots, and extruding to obtain corresponding extruded profiles. The present invention utilizes cheap magnesium-manganese master alloys to prepare novel deformed magnesium alloys with better strength and toughness. Compared with commercial magnesium alloys widely used at present, the deformed magnesium alloy profiles have low cost (compared with AZ31 series magnesium alloys, Mg -Mn (calculated based on Mn: 1.0wt.%) binary deformed magnesium alloy can save about 400 yuan / ton), the heat deformation temperature of the alloy is low, and it has excellent plastic processing performance, its strength and toughness Significantly better than conventional commercial AZ31 magnesium alloy.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a rare-earth-free, low-cost, high-plasticity, high-strength deformable magnesium alloy and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, the consumption of global resources is increasing, leading to the depletion of non-renewable resources such as oil and coal. Therefore, vigorously developing lightweight structural materials with the goal of reducing energy consumption and carbon emissions has become a hot spot in material science research. Magnesium, with its advantages of low density and large reserves, has gained a lot of attention in the research and development of new materials. Widespread concern. At present, the widely used AZ series magnesium alloys containing Al have excellent room temperature performance, but poor high temperature stability; while the ZK series magnesium alloys containing Zn and Zr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22C1/06C22F1/06
Inventor 汤爱涛喻正文潘复生汪琴林翰杨如民张磊许婷熠章建跃
Owner CHONGQING UNIV
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