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Aluminum zinc based multi-component alloy spherical powder and preparation method and application thereof

A spherical powder, aluminum-zinc technology, applied in the field of alloy powder, can solve the problem of limited improvement

Active Publication Date: 2019-05-03
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the combustion heat of the aluminum-zinc alloy fuel is 23-26kJ / g, the ignition temperature is still 1050-1300°C, and the combustion rate is 60-70%. Compared with the combustion performance of pure aluminum powder, the improvement is limited.

Method used

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  • Aluminum zinc based multi-component alloy spherical powder and preparation method and application thereof
  • Aluminum zinc based multi-component alloy spherical powder and preparation method and application thereof
  • Aluminum zinc based multi-component alloy spherical powder and preparation method and application thereof

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preparation example Construction

[0028] The present invention also provides a method for preparing the aluminum-zinc-based multi-element alloy spherical powder described in the above technical solution, comprising the following steps:

[0029] (1) Under an inert atmosphere, sequentially melting and mixing aluminum ingots, zinc ingots and component metal elements to obtain a smelting solution;

[0030] (2) Under an inert atmosphere, atomize and rapidly condense the smelting liquid obtained in the step (1) to obtain the aluminum-zinc-based multi-element alloy spherical powder.

[0031] The invention melts and mixes aluminum ingots, zinc ingots and component metals sequentially under an inert atmosphere to obtain a smelting solution. In the present invention, the aluminum in the aluminum-zinc-based multi-element alloy spherical powder is added in the form of aluminum ingots; the zinc is added in the form of zinc ingots; and the component metal elements are preferably added in the form of corresponding metal elem...

Embodiment 1

[0044] An aluminum-zinc-based multi-element alloy spherical powder, including the following elements by mass fraction: aluminum 87%, zinc 10%, magnesium 3%;

[0045] Preparation methods include:

[0046] (1) First weigh aluminum ingots, zinc ingots and magnesium ingots with a mass ratio of 87:10:3, and use high-temperature nitrogen to purge the aluminum ingots, zinc ingots and magnesium ingots; In the melting furnace, use the intermediate frequency heating ring to heat the furnace body to 680-730°C to melt the aluminum ingots, then add zinc ingots; finally add magnesium ingots to melt and mix to obtain a smelting solution;

[0047] (2) Under an inert atmosphere, pass the smelting liquid into an atomization furnace for gas atomization treatment; use a 325 mesh vibrating sieve to carry out particle size classification on the gas atomization treatment product to obtain the spherical powder of the aluminum-zinc-based multi-element alloy, and then carry out Sealed packaging; where...

Embodiment 2

[0053] An aluminum-zinc-based multi-element alloy spherical powder, including the following elements in mass fractions: 80% aluminum, 15% zinc, 3% lead, and 2% bismuth;

[0054] Preparation methods include:

[0055] (1) First weigh aluminum ingots, zinc ingots, lead ingots, and bismuth ingots with a mass ratio of 80:15:3:2, and use high-temperature nitrogen to purge the aluminum ingots, zinc ingots, lead ingots, and bismuth ingots; Next, add aluminum ingots to the pre-melting furnace, use the intermediate frequency heating ring to heat the furnace body to 680-730 °C to melt the aluminum ingots, then add zinc ingots to melt and mix, then add lead ingots and bismuth ingots to melt and mix in turn to obtain smelting liquid;

[0056] (4) Under an inert atmosphere, pass the smelting liquid into an atomization furnace for gas atomization treatment; after the gas atomization treatment, use a 325-mesh vibrating screen to carry out particle size classification on the gas atomization t...

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Abstract

The invention provides aluminum zinc based multi-component alloy spherical powder and a preparation method and application thereof, and belongs to the technical field of alloy powder. The aluminum zinc based multi-component alloy spherical powder comprises aluminum, zinc and component metal elements, and the component metal elements comprise one or more of Li, Mg, Bi, Sb and Pb. The Li and the Mgin the component metal elements have lower melting and boiling points, are volatile and can form steam, and the steam can prevent the formation of oxides; when the Li and the Mg are burnt in a gas phase, a gas phase diffusion flame can be formed, the heating rate is high, and the opportunity for forming the oxides is less; and therefore, when the Mg and the Li are added into aluminum and zinc, thefuel activity of the aluminum and zinc can be improved, the firing temperature is lowered, and the burning performance is improved. The density of the Bi, the Sb and the Pb in the component metal elements is much greater than metal aluminum, due to the special performance of the oxides of the Bi, the Sb and the Pb, the burning efficiency of aluminum particles can be improved by increasing the high volume impulse quantity and energy density of the aluminum particles. The embodiment shows that the powder burning heat reaches 27kJ / g, the firing temperature is lowered to 960 DEG C, and the burning rate reaches 90%.

Description

technical field [0001] The invention relates to the technical field of alloy powders, in particular to an aluminum-zinc-based multi-element alloy spherical powder and a preparation method and application thereof. Background technique [0002] As a metal fuel, aluminum powder has relatively high volumetric combustion enthalpy and high energy density, and can be widely used in the fields of propellants, explosives and pyrotechnics. The melting point of aluminum is 660°C, and the boiling point is 2327°C. At the same time, the heat of vaporization of aluminum is 291.4kJ / mol. Many combustion conditions cannot reach the boiling point of aluminum. Therefore, liquid aluminum is not easy to be vaporized. Aluminum particles react in gas phase with water, carbon dioxide, oxygen, etc. in the combustion products of energetic materials, and the gas phase reaction rate depends on the gasification rate of aluminum particles. Since the gasification of aluminum particles is surface gasificat...

Claims

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Application Information

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IPC IPC(8): B22F9/08C22C21/10C06B33/00
Inventor 焦清介张碧闫石郭学永杜风贞刘大志
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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