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Preparation method of a micron-sized closed-cell foamed magnesium alloy composite material

A technology of closed-cell foam and composite materials, which is applied in the field of preparation of micron-sized closed-cell foam metal composite materials, which can solve the problems of small size range and unfavorable application in the field of structural materials, and achieve improved yield strength, excellent sound insulation and electromagnetic shielding effect, effect of increasing number

Active Publication Date: 2019-11-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN101463434B discloses a method for preparing foamed magnesium alloy, which belongs to the category of powder metallurgy, and the product is affected by the pre-press block mold in the preparation process. The size range is small, which is not conducive to the application in the field of structural materials
However, there is currently a lack of research and reports on the preparation method of micron-sized closed-cell foamed magnesium alloys. Therefore, it is extremely necessary to explore a preparation method for micron-sized closed-cell foamed magnesium alloys to meet market demand.

Method used

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  • Preparation method of a micron-sized closed-cell foamed magnesium alloy composite material
  • Preparation method of a micron-sized closed-cell foamed magnesium alloy composite material
  • Preparation method of a micron-sized closed-cell foamed magnesium alloy composite material

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Embodiment 1

[0032] The first step, raw material preparation:

[0033] The AZ31B magnesium alloy is a cylinder with a diameter of 90mm, which is cut into thin slices with a thickness of about 10mm by a horizontal sawing machine for use; the amount of ceramic microspheres added is 20% of the volume fraction of the AZ31B magnesium alloy matrix; weigh the mass of the AZ31B magnesium alloy matrix 0.3% of the calcium metal particles and 1.5% of the magnesium-30 cerium master alloy are wrapped with aluminum foil respectively for use; the calcium carbonate powder with a mass fraction of 1.5% of the magnesium alloy matrix is ​​weighed and wrapped with aluminum foil for use;

[0034] Step 2: After the smelting mold is assembled, preheat it to 260°C in the well-type resistance furnace, take out the mold and spray the release agent on the mold, and weigh 893 grams of magnesium alloy sheet according to the demand, with a diameter of 90mm and a thickness of about 10mm. Put a piece of magnesium alloy in...

Embodiment 2

[0044] The first step, raw material preparation:

[0045] The AZ31B magnesium alloy is a cylinder with a diameter of 90mm, which is cut into thin slices with a thickness of 15mm by a horizontal sawing machine for use; the amount of ceramic microspheres added is 10% of the volume fraction of the AZ31B magnesium alloy matrix, and a certain volume fraction of Ceramic microspheres are ready for use; weigh 0.3% calcium metal particles and 2% magnesium-30 cerium master alloy of AZ31B magnesium alloy matrix mass fraction and wrap them with aluminum foil respectively; weigh magnesium alloy matrix mass fraction of 1.5% carbonic acid Calcium powder, wrapped in aluminum foil for later use;

[0046] Step 2: After the assembly of the smelting mold is completed, preheat it to 300°C in the well-type resistance furnace, take out the mold and spray the release agent on the mold, and weigh 958 grams of magnesium alloy sheet according to the demand, with a diameter of 90mm and a thickness of abo...

Embodiment 3

[0053] The first step, raw material preparation:

[0054] The AZ91D magnesium alloy is a cylinder with a diameter of 90mm, which is cut into thin slices with a thickness of about 12mm by a horizontal sawing machine for use; the amount of ceramic microspheres added is 30% of the volume fraction of the AZ91D magnesium alloy matrix, and a certain volume fraction is measured with a graduated cylinder 0.1% of the mass fraction of the AZ91D magnesium alloy matrix and 3% magnesium-30 cerium master alloy were weighed and wrapped with aluminum foil respectively for use; weighing 1.5% of the mass fraction of the magnesium alloy matrix Calcium powder, wrapped in aluminum foil for later use;

[0055] Step 2: After the smelting mold is assembled, preheat it to 200°C in the well-type resistance furnace, take out the mold and spray the mold release agent on the mold, and weigh 856 grams of magnesium alloy sheet according to the demand, with a diameter of 90mm and a thickness of about 10mm. ...

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Abstract

The invention relates to a method for preparing a micron-aperture closed-cell foamed magnesium alloy composite material. The method comprises the following steps: under a protective atmosphere, after melting the magnesium alloy and ceramic microspheres in a melting mold in a pit furnace, adding metallic calcium particles and magnesium-30 cerium master alloy to the melt, and then adding carbonic acid Calcium powder is stirred, and after heat preservation and air cooling, a micron pore size closed-cell foam magnesium alloy composite material is obtained. The invention has the advantages of low cost, good thickening effect, simple process and operation, etc., and is suitable for industrial production. The pore size distribution of the product is 50-900 μm, the average pore size is about 400 μm, the porosity is 70-90%, and the overall foaming works well.

Description

Technical field: [0001] The invention belongs to the field of preparation of foamed metal materials, in particular to a preparation method of a micron-aperture closed-cell foamed metal composite material. Background technique: [0002] Closed-cell metal foam is a new type of porous material integrating structure and function. It has light weight, high specific strength and specific stiffness, and good energy absorption and shock absorption effects. It has been widely used in automobiles, high-speed rail, aerospace and construction, etc. field. The preparation methods of closed-cell metal foam mainly include melt foaming method, powder metallurgy method, hollow ball casting method, etc. Among them, the melt foaming method has the advantages of simple production process, high yield, low production cost, and wide range of product sizes. Advantages, the most widely used in industrial production. At present, the closed-cell metal foams put into practical application mainly incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C1/02C22C23/00C22C32/00
CPCC22C1/02C22C1/08C22C23/00C22C32/00C22C1/086
Inventor 夏兴川彭远祎王楠楠丁俭陈学广赵彦明余晖宋开红
Owner HEBEI UNIV OF TECH