Missile heavy-gravity tungsten alloy and preparation method thereof

A tungsten alloy and high specific gravity technology, which is applied in the field of high specific gravity tungsten alloys for elastics and the preparation of high specific gravity tungsten alloys for elastics, can solve the problems of uneven distribution of bonding phase, affecting performance stability, and many residual pores.

Active Publication Date: 2016-03-30
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high specific gravity tungsten alloy for armor-piercing projectile cores still has many defects that affect the performance stability, such as uneven distribution of binder phase, hydrogen embrittlement, segregation of intermetal...

Method used

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  • Missile heavy-gravity tungsten alloy and preparation method thereof
  • Missile heavy-gravity tungsten alloy and preparation method thereof
  • Missile heavy-gravity tungsten alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] High specific gravity tungsten alloy for bullets, in mass percentage, the composition of the alloy is as follows:

[0029] Tungsten (W) 94.6%,

[0030] Zirconia (ZrO 2 )0.6%,

[0031] Nickel (Ni) 3.36%,

[0032] Iron (Fe) 1.44%,

[0033] and unavoidable impurities.

[0034] The preparation method of bullet with high specific gravity tungsten alloy (100kg), comprises the following steps:

[0035] 1) Preparation of zirconia-containing composite tungsten powder

[0036] Dissolve 129.68kg of ammonium metatungstate (the conversion rate of ammonium metatungstate into tungsten oxide powder is 92%) and 2.09kg of zirconium nitrate in water respectively, and then mix the two solutions evenly to obtain a mixed solution; take the mixed solution and evaporate to dryness to obtain The dry powder is calcined at a temperature of 500°C for 4 hours; the calcined product is put into a push rod reduction furnace and reduced in two stages, the temperature of the first stage of reducti...

Embodiment 2

[0044] High specific gravity tungsten alloy for bullets, in mass percentage, the composition of the alloy is as follows:

[0045] Tungsten (W) 91.7%,

[0046] Zirconia (ZrO 2 )0.2%,

[0047] Nickel (Ni) 5.67%,

[0048] Iron (Fe) 2.43%,

[0049] and unavoidable impurities.

[0050] The preparation method of bullet with high specific gravity tungsten alloy (100kg), comprises the following steps:

[0051] 1) Preparation of zirconia-containing composite tungsten powder

[0052] Dissolve 125.71kg of ammonium metatungstate and 0.70kg of zirconium nitrate in water respectively, and then mix the two solutions evenly to obtain a mixed solution; evaporate the mixed solution to dryness, and calcinate the obtained dry powder at a temperature of 400°C for 5 hours; put the calcined product in Put it into the push rod reduction furnace and divide it into two stages of reduction. The temperature of the first stage of reduction is 500°C, and the reduction time is 2 hours. The temperature...

Embodiment 3

[0060] High specific gravity tungsten alloy for bullets, in mass percentage, the composition of the alloy is as follows:

[0061] Tungsten (W) 92.9%,

[0062] Zirconia (ZrO 2 )0.8%,

[0063] Nickel (Ni) 4.41%,

[0064] Iron (Fe) 1.89%,

[0065] and unavoidable impurities.

[0066] The preparation method of bullet with high specific gravity tungsten alloy (100kg), comprises the following steps:

[0067] 1) Preparation of zirconia-containing composite tungsten powder

[0068] Dissolve 127.35kg of ammonium metatungstate and 2.79kg of zirconium nitrate in water respectively, and then mix the two solutions evenly to obtain a mixed solution; evaporate the mixed solution to dryness, and calcinate the obtained dry powder at a temperature of 450°C for 5 hours; put the calcined product in Put it into the push rod reduction furnace and divide it into two stages of reduction. The temperature of the first stage of reduction is 600°C, and the reduction time is 1.5 hours. The temperatu...

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Abstract

The invention discloses a missile heavy-gravity tungsten alloy and a preparation method thereof, and belongs to the field of metal materials. The missile heavy-gravity tungsten alloy consists of the following alloy components in percentage by mass: 90.0%%-97.0% of tungsten, 0.1%-2.0% of zirconium oxide, 2.0%-9.9% of binding-phase nickel and iron, and inevitable impurities, wherein a mass ratio of the nickel to the iron is (3-4) to (2-1). The preparation method comprises the following steps: respectively dissolving ammonium metatungstate and zirconium nitrate into water, mixing to obtain mixed liquor, drying the mixed liquor to obtain power, roasting and reducing the powder to obtain composite tungsten powder; taking nickel powder and iron powder, carrying out ball-milling on the nickel powder and the iron powder after mixing, thereby obtaining a nickel-iron solid solution; mixing the composite tungsten powder with the nickel-iron solid solution to obtain mixed powder, and pressing and sintering the mixed powder to obtain the missile heavy-gravity tungsten alloy. According to the invention, high-temperature steady-phase ZrO2 is added into the tungsten alloy, a ZrO2 dispersed phase is fine and is uniformly distributed in a tungsten base body, so that the problem of poor mechanical property because of low compactness and uneven phase distribution of the missile tungsten alloy is solved; tensile strength of the tungsten alloy is higher than 1250MPa, and ductility of the tungsten alloy is higher than 17%; and the missile heavy-gravity tungsten alloy has the characteristics of high strength and high plasticity.

Description

technical field [0001] The invention relates to a high-specific-gravity tungsten alloy for bombs, and also relates to a preparation method of the high-specific-gravity tungsten alloy for bombs, which belongs to the field of metal materials. Background technique [0002] High specific gravity tungsten alloy is a kind of alloy with tungsten as the matrix and added elements such as Ni, Fe, Co, Cu, Mo, Cr, etc. The density is usually 17.5~19.0g / cm 3 . High specific gravity tungsten alloy not only has high density, but also has the advantages of high melting point, high strength, high hardness, good electrical and thermal conductivity, small thermal expansion coefficient, low vapor pressure and high temperature strength. It is widely used in civil industry, such as tungsten alloy for the core material of rod-type kinetic energy armor-piercing projectiles, balance weight components, inertial components, and ray shielding materials. With the increasing strengthening of main battl...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/04B22F9/26
CPCB22F9/26C22C1/045C22C27/04
Inventor 徐流杰肖方闹潘昆明张国赏王晓东李继文魏世忠徐锐李秀青刘伟
Owner HENAN UNIV OF SCI & TECH
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