High-density tungsten alloy containing rare earth oxide for armor-piercing bullet core and preparation method thereof

A high-density tungsten alloy and rare earth oxide technology, which is applied in the direction of ammunition, warheads, projectiles, etc., can solve the problems of unstable performance and low comprehensive mechanical properties, and achieve stable performance control, high plasticity, and excellent comprehensive mechanical properties. Effect

Active Publication Date: 2012-03-28
ZIGONG CEMENTED CARBIDE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an improved high-density tungsten alloy with excellent comprehensive performance for the deficiencies in the prior art of high-density tungsten alloy materials for armor-piercing projectile cores, so as to solve the problems of unstable performance and comprehensive mechanical properties mentioned above. performance is not high

Method used

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  • High-density tungsten alloy containing rare earth oxide for armor-piercing bullet core and preparation method thereof
  • High-density tungsten alloy containing rare earth oxide for armor-piercing bullet core and preparation method thereof
  • High-density tungsten alloy containing rare earth oxide for armor-piercing bullet core and preparation method thereof

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Effect test

Embodiment 1

[0027] The preparation method of the high-density tungsten alloy containing rare earth oxides for the armor-piercing projectile core of the present invention includes the following steps (taking the preparation of 100 kg of high-density tungsten alloy as an example, the same below):

[0028] Step 1: Preparation of composite tungsten powder containing rare earth oxides

[0029] Mix 115.2 kg of blue tungsten oxide (folded metal W: 92.0 kg) and 1 kg of rare earth oxide lanthanum oxide in a mixer for 12 hours, and then mix the mixed oxide in three stages at temperatures of 750°C, 850°C, and 960°C. The reduction is carried out in the 15-tube hydrogen reduction furnace in the temperature zone, and the hydrogen flow rate is: 3m 3 / h, the speed of pushing the boat is 8mm / min; the reduced composite tungsten powder containing tungsten powder and rare earth oxide is sieved through a 120-mesh sieve.

[0030] Step 2: Preparation of the mixture

[0031] Mix 93 kg of composite tun...

Embodiment 2

[0045] Step 1: Preparation of composite tungsten powder containing rare earth oxides

[0046] Mix 118.9 kg of blue tungsten oxide (folded metal W: 95.0 kg) and 0.05 kg of cerium oxide in a mixer for 18 hours, and then mix the mixed oxide in three temperature zones with temperatures of 700°C, 820°C, and 900°C for ten The reduction is carried out in a five-tube hydrogen reduction furnace, and the hydrogen flow rate is: 2m 3 / h, the speed of pushing the boat is 5 mm / min; the reduced composite tungsten powder containing tungsten powder and rare earth oxide is sieved through a 200-mesh sieve.

[0047] Step 2: Preparation of the mixture

[0048] Mix 95.05 kg of composite tungsten powder, 3.95 kg of nickel powder and 1.0 kg of iron powder in a mixer for 12 hours, then pass the mixture through a 140-mesh screen.

[0049] Step 3: Compression molding

[0050] Put the mixed powder into a rubber sleeve and press to form in an isostatic press with a pressing pressure of 200 MPa ...

Embodiment 3

[0063] A method for preparing a high-density tungsten alloy containing rare earth oxides for an armor-piercing projectile core comprises the following steps:

[0064] Step 1: Preparation of composite tungsten powder containing rare earth oxides

[0065] Mix 113.3 kg of blue tungsten oxide (folded metal W: 90.5 kg) with 1 kg of cerium oxide and 1 kg of lanthanum oxide in a mixer for 14 hours, and then mix the mixed oxides at temperatures of 730°C, 880°C, and 980°C, respectively. Reduction is carried out in a fifteen-tube hydrogen reduction furnace with three temperature zones, and the hydrogen flow rate is: 5m 3 / h, the speed of pushing the boat is 10mm / min; the reduced composite tungsten powder containing tungsten powder and rare earth oxide is sieved through a 200-mesh sieve.

[0066] Step 2: Preparation of the mixture

[0067] Mix 92.5 kg of composite tungsten powder with 4.9 kg of nickel powder, 2.1 kg of iron powder, 0.44 kg of cobalt powder, and 0.06 kg of manga...

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Abstract

The invention relates to a high-density tungsten alloy containing rare earth oxide for an armor-piercing bullet core. The alloy comprises the following components in parts by weight: 90-95 parts of tungsten, 0.05-2.0 parts of lanthanum oxide or cerium oxide, 4.95-9.95 parts of binder phase nickel and ferrum. The invention also relates to a preparation method of the high-density tungsten alloy, and the method comprises the following steps: evenly mixing and reducing tungsten oxide and rare earth oxide to obtain compound tungsten powder; then mixing the compound tungsten powder with the binder phase; and successively carrying out pressing, sintering, argon heat treatment, working hardening, prestraining aging heat treatment and the like on the mixed material. Through the reasonable component proportion and preparation method, the high-density tungsten alloy material disclosed by the invention has the advantages of excellent comprehensive mechanical property, such as high strength and high plasticity, and stable performance, thereby providing a wide application prospect for developing and designing new types of armor-piercing bullet with new functions.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a high-density tungsten alloy containing rare earth oxides for armor-piercing projectile cores and a preparation method thereof. Background technique [0002] High-density tungsten alloy is a kind of alloy based on tungsten (the mass fraction of tungsten is usually 80%-97%), and added with Ni, Fe, Co, Cu, Mo, Cr and other elements, its density is as high as 16.5- 19.0g / cm 3 , and are commonly known as high-density tungsten alloys, high-density alloys, and heavy alloys. High-density tungsten alloy not only has high density, but also has a series of excellent properties: high strength, high hardness, good ductility, good machinability, small thermal expansion coefficient, large thermal conductivity, good oxidation and corrosion resistance, weldability OK wait. These excellent properties have been widely used in cutting-edge scientific fields, military industry and civilian ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/05F42B12/04
Inventor 张俊
Owner ZIGONG CEMENTED CARBIDE CORP
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