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Stripped tungsten alloy material with self-sharpening structure, as well as preparation method and application thereof

A technology of tungsten alloy and tungsten-nickel-iron alloy, which is applied in the field of self-sharpening structure tungsten alloy material and its preparation, can solve the problem of limited control level of adiabatic shear performance

Active Publication Date: 2020-06-16
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing methods such as pressureless liquid phase sintering, hot pressing sintering, two-step sintering, and simple plastic deformation have limited control over the adiabatic shear properties of tungsten alloy materials.

Method used

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  • Stripped tungsten alloy material with self-sharpening structure, as well as preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0020] The invention provides a method for preparing a layer-peeling self-sharpening structure tungsten alloy material, comprising the following steps:

[0021] The mixed powder obtained by mixing tungsten oxide powder, nickel oxide powder and iron oxide powder is subjected to pulse reduction plasma jet treatment and cooling treatment to obtain tungsten-nickel-iron pre-alloyed powder;

[0022] The tungsten-nickel-iron pre-alloyed powder is subjected to four-stage roller forming treatment to obtain plate-shaped tungsten-nickel-iron alloy;

[0023] performing roll bending deformation treatment on the plate-shaped tungsten-nickel-iron alloy to obtain deformed tungsten-nickel-iron alloy;

[0024] The deformed tungsten-nickel-iron alloy is subjected to warm-pressing and densification treatment to obtain a tungsten alloy material with exfoliated self-sharpening structure.

[0025] In the present invention, unless otherwise specified, the raw materials and equipment used are commerc...

Embodiment 1

[0035] (1) In terms of mass percentage, take 92.70% tungsten oxide powder (with a particle size of 2-6 μm), 5.33% nickel oxide powder (with a particle size of 2-6 μm) and 1.97% iron oxide powder (with a particle size of 2-6 μm) and mix evenly, The obtained mixed powder is subjected to pulse reduction plasma jet treatment and cooling treatment to obtain tungsten-nickel-iron pre-alloyed powder; wherein, the operating conditions include: the plasma source is a mixture of argon and hydrogen, and the volume ratio of argon and hydrogen is 6 : 4; the pulse current is 2.3A, and the pulse frequency is 6.8Hz; based on the mass of the mixed powder, the treatment efficiency of the pulse reduction plasma jet treatment is 7s / g; the cooling medium is 3°C circulating water;

[0036] (2) Send the tungsten-nickel-iron pre-alloyed powder into a four-stage roller forming integrated device for forming to obtain a plate-shaped tungsten-nickel-iron alloy; wherein, the operating conditions include: th...

Embodiment 2～8

[0040] According to the method of Example 1, the peeled self-sharpening structure tungsten alloy material is prepared, and the ratio of raw materials and the operating parameters of each step are shown in Table 1 (the operating conditions or parameters not listed in Table 1 are the same as Example 1).

[0041] Raw material proportioning and the operation parameter of each step in the embodiment 1~8 of table 1

[0042]

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Abstract

The invention provides a stripped tungsten alloy material with a self-sharpening structure, as well as a preparation method and application thereof, and belongs to the technical field of tungsten alloy preparation. The preparation method comprises the steps of carrying out pulse reduction plasma jet treatment and cooling treatment on mixed powder obtained after mixing tungsten oxide powder, nickeloxide powder and ferric oxide powder, and obtaining tungsten-nickel-iron prealloyed powder; carrying out four-stage roll forming treatment on the tungsten-nickel-iron prealloyed powder, and obtaininga plate type tungsten-nickel-iron alloy; carrying out roll-bending deformation treatment on the plate type tungsten-nickel-iron alloy, and obtaining a deformed tungsten-nickel-iron alloy; and carrying out warm-pressing densification treatment on the deformed tungsten-nickel-iron alloy, and obtaining the stripped tungsten alloy material with the self-sharpening structure. According to the strippedtungsten alloy material with the self-sharpening structure, as well as the preparation method and the application thereof provided by the invention, through adopting a pulse reduction plasma jet technology, four-stage roll forming treatment, roll-bending deformation treatment and warm-pressing densification treatment, the technical advantages of chemical reduction and plastic deformation are fully played, so that the compatibility of the strength and the plasticity of the tungsten alloy material can be optimized, and the obtained stripped tungsten alloy material with the self-sharpening structure has a better adiabatic shear performance.

Description

technical field [0001] The invention relates to the technical field of tungsten alloy preparation, in particular to a layer-peeling self-sharpening structure tungsten alloy material and its preparation method and application. Background technique [0002] As a structural material, high-density tungsten alloy is mainly used in military fields such as the core of armor-piercing projectiles. The matching of strength and plasticity (adiabatic shear performance) is the key condition for determining the armor-piercing performance of bullets. If the strength is too high and the plasticity is low, it will be brittle during the armor-piercing process. On the contrary, if the strength is low and the plasticity is too high, a "mushroom"-shaped bullet will easily appear, and the bullet will lose its self-sharpening and armor-piercing properties. The existing methods such as pressureless liquid phase sintering, hot pressing sintering, two-step sintering, and simple plastic deformation ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F3/18B22F3/14C22C27/04
CPCB22F9/22B22F3/18B22F3/14C22C27/04B22F2003/145Y02P10/25
Inventor 董洪峰艾桃桃李文虎
Owner SHAANXI SCI TECH UNIV
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