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Composite energetic fragment containing tough outer layer and brittle inner layer and preparation method of composite energetic fragment

An inner layer and outer layer technology, applied in the field of metal matrix composite energetic fragments, can solve problems such as insufficient penetration ability and secondary damage ability, inability to meet military application requirements, complicated preparation methods, etc., and achieve improved secondary damage effect , Engineering application is easy to realize, and the effect of simple processing and preparation technology

Active Publication Date: 2021-11-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the penetration ability and secondary damage ability of aluminum-nickel or tungsten-zirconium metal energetic fragments in the prior art are still insufficient. At the same time, the preparation method is relatively complicated and the production cost is high, which cannot meet the new military application requirements in complex environments.

Method used

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  • Composite energetic fragment containing tough outer layer and brittle inner layer and preparation method of composite energetic fragment
  • Composite energetic fragment containing tough outer layer and brittle inner layer and preparation method of composite energetic fragment
  • Composite energetic fragment containing tough outer layer and brittle inner layer and preparation method of composite energetic fragment

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preparation example Construction

[0038] According to the technical solution of the present invention, a specific method for preparing the composite energetic fragment includes:

[0039] Step 1: Put tungsten powder and zirconium powder in an all-round planetary ball mill and mix evenly, wherein the mass of tungsten powder is 30-70% of the total mass of tungsten powder and zirconium powder;

[0040] Step 2: Add the prepared binder solution to the uniform powder obtained in Step 1, and bond and granulate;

[0041] Step 3: Place the granulated metal obtained in Step 2 in a pressing mold for pre-pressing;

[0042] Step 4: Pre-sintering the pre-pressed molded part obtained in Step 3 to obtain product A;

[0043] Step 5: Put the aluminum powder, nickel powder and reinforcement powder in an all-round planetary ball mill and mix evenly, wherein the mass of the aluminum powder is 20-60% of the total mass of the aluminum powder, nickel powder and reinforcement powder;

[0044] Step 6: Fill the product A obtained in st...

Embodiment 1

[0055] A composite energetic fragment with a tough outer layer and a brittle inner layer is prepared by the following steps:

[0056] Weighing and powder mixing:

[0057] According to the mass ratio of the components, tungsten powder / zirconium powder = 30 / 70, weigh 30g of tungsten powder and 70g of zirconium powder, mix them in a full-range planetary ball mill for 1 hour, and add 2wt% polyvinyl alcohol binder after mixing solution, bonding granulation;

[0058] Preload:

[0059] Put the mixture obtained after granulation into a cylindrical mold for compression, pressurize at a pressurization rate of 30N / s to a pressure of 30MPa, hold the pressure for 3 minutes and release the pressure at a pressure release rate of 30N / s, and demould after the pressure release. get preloaded parts;

[0060] Pre-sintering:

[0061]The preform obtained was placed in a vacuum high-temperature sintering furnace for sintering under an argon atmosphere, the sintering temperature was 1450°C, and t...

Embodiment 2

[0068] A composite energetic fragment with a tough outer layer and a brittle inner layer is prepared by the following steps:

[0069] Weighing and powder mixing:

[0070] According to the mass ratio of the components, tungsten powder / zirconium powder = 50 / 50, weigh 50g of tungsten powder and 50g of zirconium powder, mix them in an all-round planetary ball mill for 1 hour, and bond and granulate after mixing;

[0071] Preload:

[0072] Place the obtained granulation in a cylindrical mold for compression, pressurize at a pressurization rate of 30N / s to a pressure of 30MPa, hold the pressure for 5 minutes and release the pressure at a pressure release rate of 30N / s, and demould after the pressure release to obtain a molded part ;

[0073] Pre-sintering:

[0074] Place the molded part in a sintering furnace for sintering, use an argon atmosphere during the sintering process, the sintering temperature is 1500°C, and the sintering time is 1h to obtain a cylindrical test piece A; ...

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Abstract

The invention discloses a composite energetic fragment containing a tough outer layer and a brittle inner layer and a preparation method of the composite energetic fragment. The preparation method comprises the following steps that an inner layer material containing a tungsten-zirconium alloy is obtained; the outer side of the inner layer material is filled with mixed ball-milled powder of aluminum metal powder, nickel metal powder and reinforcing material powder, co-die pressing and co-sintering are carried out, and the composite energetic fragment is obtained. The preparation method is simple in process and low in production cost, and the obtained composite energetic fragment is provided with the high-strength and high-toughness outer layer and the high-brittleness inner layer and has very high penetration and secondary damage efficiency.

Description

technical field [0001] The invention relates to the technical field of metal matrix composite energetic fragments. Background technique [0002] Tungsten alloy fragments are increasingly widely used as the killing element of anti-personnel ammunition due to their high density, strong ability to maintain speed and armor penetration. It has the function of ignition or arson, and can have a higher secondary damage area and damage aftereffect after armor penetration. Therefore, a single tungsten-zirconium composite energetic fragment with this function came into being. [0003] Al-Ni alloys are typical energetic structural materials, which are quite stable at room temperature and have high strength and plasticity, while tungsten-zirconium alloys have high brittleness. Under the action of impact load, both aluminum-nickel and tungsten-zirconium alloys will induce chemical reactions due to the impact and release a large amount of heat. The composite energetic fragments prepared ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/02B22F9/04B22F3/16B22F1/00C06B27/00
CPCB22F7/02B22F9/04B22F3/16C06B27/00B22F2009/043
Inventor 束庆海石艳松吕席卷成丽荣赵帅王东旭邹浩明徐博林文萍夏为浩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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