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Aluminum-magnesium alloy powder and preparation method and application thereof

A technology of aluminum-magnesium alloy powder and alloy powder, applied in the field of aluminum-magnesium alloy powder and its preparation, to achieve the effect of high sphericity

Inactive Publication Date: 2020-11-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems existing in the prior art, the present invention designs and prepares an aluminum-magnesium alloy powder, which uses the excellent ignition and combustion properties of magnesium and the characteristics of low boiling point, so that the alloy particles can participate in the oxidation more rapidly in the reaction , so as to increase the gasification rate of particles during ignition and combustion, thereby shortening the ignition delay period of aluminum powder, improving the combustion efficiency of energetic systems, and at the same time reducing the uneven phenomenon of aluminum agglomeration in the reaction to a certain extent

Method used

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  • Aluminum-magnesium alloy powder and preparation method and application thereof
  • Aluminum-magnesium alloy powder and preparation method and application thereof
  • Aluminum-magnesium alloy powder and preparation method and application thereof

Examples

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Embodiment 1

[0069] Prepare aluminum-magnesium (90-10) alloy powder as follows:

[0070] (1) After the aluminum and magnesium ingots are cleaned of impurities on the surface, they are placed in a pre-melting furnace to evacuate, and are backfilled with high-purity inert argon for protection;

[0071] (2) Use an intermediate frequency induction furnace to heat the furnace body to 700°C, control the superheat at 50-100°C, and at the same time use airflow stirring to mix the alloy melt evenly to obtain a liquid metal melt;

[0072] (3) The liquid metal melt is passed into the disc-type centrifugal atomization turntable rotating at a high speed of 18,000 rpm in the atomization furnace. The liquid metal melt is dispersed into small droplets, and the metal is controlled by controlling the parameters such as the centrifuge speed. droplet size;

[0073] (4) When performing step (3), feed high-purity argon gas below -80°C into the atomization furnace to rapidly condense the alloy droplets to form ...

Embodiment 2

[0077] Prepare aluminum-magnesium (80-20) alloy powder as follows:

[0078] (1) After the aluminum and magnesium ingots are cleaned of impurities on the surface, they are placed in a pre-melting furnace to evacuate, and are backfilled with high-purity inert argon for protection;

[0079] (2) Use an intermediate frequency induction furnace to heat the furnace body to 700°C, control the superheat at 50-100°C, and at the same time use airflow stirring to mix the alloy melt evenly to obtain a liquid metal melt;

[0080] (3) Pass the liquid metal melt into the disc-type centrifugal atomization turntable with a high-speed rotation speed of 14,000 rpm in the atomization furnace. The melt is dispersed into small droplets, and the metal liquid is controlled by controlling the centrifuge speed and other parameters. drop size;

[0081] (4) When performing step (3), feed high-purity argon gas below -80°C into the atomization furnace to rapidly condense the alloy droplets to form low-oxid...

Embodiment 3

[0085] Prepare aluminum-magnesium (95-5) alloy powder as follows:

[0086] (1) After the aluminum and magnesium ingots are cleaned of impurities on the surface, they are placed in a pre-melting furnace to evacuate, and are backfilled with high-purity inert argon for protection;

[0087] (2) Use an intermediate frequency induction furnace to heat the furnace body to 720°C, control the superheat at 50-100°C, and at the same time use airflow stirring to mix the alloy melt evenly to obtain a liquid metal melt;

[0088] (3) Pass the molten metal into the disc-type centrifugal atomization turntable rotating at a high speed of 25,000 / min in the atomization furnace. The molten metal is dispersed into small droplets, and the molten metal is controlled by controlling the speed of the centrifuge and other parameters. drop size;

[0089] (4) When performing step (3), feed high-purity argon gas below -80°C into the atomization furnace to rapidly condense the alloy droplets to form low-oxi...

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Abstract

The invention discloses aluminum-magnesium alloy powder and a preparation method and application thereof. The aluminum-magnesium alloy powder contains an aluminum element, a magnesium element and an oxygen element, wherein the total mass content of the aluminum element and the magnesium element reaches 98.5% or above, the actually measured combustion heat value of the aluminum-magnesium alloy powder is 27.5-30.5 kJ / g, the particle size range of the aluminum-magnesium alloy powder is 1-200 microns, and the density value of the aluminum-magnesium alloy powder is 2.16-2.62 g / cm<3>. The preparation method comprises the steps that metal aluminum and metal magnesium serve as raw materials, melting, atomization, condensation and optional screening treatment are conducted under the protective atmosphere, and the aluminum-magnesium alloy powder is obtained. According to the aluminum-magnesium alloy powder, the chemical property of magnesium is more active, and the magnesium can participate in oxidation more quickly in a reaction, so that the ignition delay period of aluminum powder is shortened, the combustion rate of an energetic system is increased; and meanwhile, the aluminum-magnesium alloy powder has the advantages of high compactness, high sphericity degree, high activity, low oxygen content and the like.

Description

technical field [0001] The invention belongs to the technical field of metal alloy powder preparation, and in particular relates to an aluminum-magnesium alloy powder and a preparation method thereof. Background technique [0002] Centrifugal atomization is one of the effective methods for preparing metal powder or fast-setting alloy powder. It is characterized by using a high-speed rotating disc (or roller) to make the metal droplets falling on the disc obtain enough centrifugal force to be sheared. crack. Centrifugal atomization is atomized by the shearing action of the metal melt by a high-speed rotating turntable. The atomized powder is composed of spherical particles and its size distribution is relatively narrow. The shape and particle size distribution of powder particles are important parameters affecting powder performance, which directly affect the performance of products after powder forming. By adjusting the atomization parameters, the particle size distribution...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C21/06B22F1/00B22F9/10
CPCB22F1/0007B22F9/10C22C1/0416C22C21/06
Inventor 闫石焦清介刘大志郭学永张碧潘兵张帆
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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