Tungsten alloy and preparation method thereof

A tungsten alloy and alloy technology, applied in the field of tungsten alloy materials and their preparation, can solve the problems of good elongation, poor diffusivity, and low density of materials, and achieve the effect of expanding the scope of application and high compressive strength

Active Publication Date: 2020-04-24
ZIGONG CEMENTED CARBIDE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The density and hardness of the tungsten alloy prepared by this patented method are low, and it is not conducive to armor-piercing when used as an armor-piercing projectile core. 2 o 3 Particles do not have a certain number of holes, and the elongation rate of the material is good, so that even if the bullet core penetrates the armor and the crack diffusion ability is poor, the number of fragments formed is limited, and the secondary damage tactical effect cannot be achieved.
Chinese patent CN101525714A adopt

Method used

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  • Tungsten alloy and preparation method thereof
  • Tungsten alloy and preparation method thereof
  • Tungsten alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method of high-density tungsten alloy for high aftereffect armor-piercing projectile core, such as figure 1 , including the following steps:

[0039] Step 1: Mixing of tungsten alloy powder

[0040] The components and their contents in terms of mass percentage are: W: 94.5%, Ni: 4.0%, Fe: 0.05%, Al 2 o 3 : 0.05%, Cr 3 C 2 : 0.3%, TiC: 0.4%, WC: 0.7%, wherein: "X" component content: 0.05%; "Y" component content: 0.05%; "Z" component content: 1.4%. Put the powders of each component into the V-shaped mixer according to the above mass percentages, and mix for 24 hours.

[0041] Step 2: Compression molding

[0042] Put the uniformly mixed tungsten alloy mixed powder into the mold, and press it into a compact by hydraulic press or cold isostatic press.

[0043] Step 3: Sintering

[0044] Put the tungsten alloy compact into a molybdenum boat or a corundum boat. The filler is alumina powder. The boat is sintered in a hydrogen-protected molybdenum w...

Embodiment 2

[0047] Step 1: Mixing of tungsten alloy powder

[0048] The components and their contents in terms of mass percentage are: W: 96.4%, Ni: 0.2%, Cu: 0.9%, Co: 2.0%, Mn: 0.1%, ZrO 2 : 0.25%, SiO 2 : 0.1%; VC: 0.05%, wherein: "X" component content: 3.0%; "Y" component content: 0.35%; "Z" component content: 0.05%. Put the powders of each component into the V-shaped mixer according to the above mass percentages, and mix for 22 hours.

[0049] Step 2: Compression molding

[0050] Put the uniformly mixed tungsten alloy mixed powder into the mold, and use a hydraulic press or a cold isostatic press at a rate of 2.0 tons / cm 2 The pressing pressure is pressed into a compact

[0051] Step 3: Sintering

[0052] Put the tungsten alloy compact into a molybdenum boat or a corundum boat. The filler is alumina powder. The boat is sintered in a hydrogen-protected molybdenum wire heating furnace. The sintering temperature is 1500°C and the holding time is 1.0h. In the structure of the high-...

Embodiment 3

[0054] Step 1: Mixing of tungsten alloy powder

[0055] The components and their contents in terms of mass percentage are: W: 98.5%, Ni: 0.5%, Cr: 0.7%, Y 2 o 3 :0.1%;Cr 3 C 2 : 0.2%, of which: "X" component content: 0.7%; "Y" component content: 0.1%; "Z" component content: 0.2%. Put the powders of each component into the V-type mixer according to the above mass percentages, and mix for 20 hours.

[0056] Step 2: Compression molding

[0057] Put the uniformly mixed tungsten alloy mixed powder into the mold, and use a hydraulic press or a cold isostatic press at a rate of 2.5 tons / cm 2 The pressing pressure is pressed into a compact

[0058] Step 3: Sintering

[0059] Put the tungsten alloy compact into a molybdenum boat or a corundum boat. The filler is alumina powder. The boat is sintered in a hydrogen-protected molybdenum wire heating furnace. The sintering temperature is 1530°C and the holding time is 0.5h. In the structure of the high-density tungsten alloy materia...

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Abstract

The invention belongs to the technical field of powder metallurgy, and relates to a tungsten alloy and a preparation method thereof. The tungsten alloy comprises components in the specific expressionof W100%-tNiaXbYcZd. Due to the reasonable composition proportion and strict control over process parameters of all steps, the tungsten alloy material has the physical and mechanical properties of high density, high hardness and high compressive strength. Used as a armour-piercing bullet core, the good armour piercing power is achieved, meanwhile, due to the facts that the low plasticity is achieved, a brittle phase is distributed in the tissue structure, holes are distributed, and proper porosity is formed, cracks are formed when the bullet core pierces an armour and is impacted by stress waves, so that the bullet core becomes a fragment breaking source, and finally a large number of broken pieces are formed after the armour is pierced. The alloy has the characteristics of being good in armour piercing power and large in number of broken pieces after the armour is pierced, and wider space is provided for design and application of new-generation armour-piercing bullets in China.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a tungsten alloy material and a preparation method thereof. Background technique [0002] Because of its high density, high strength, good plasticity and other excellent properties, tungsten alloy is currently the main material for preparing kinetic energy armor-piercing projectile cores. [0003] The small-caliber weapon systems that are widely used at present are mostly equipped with grenades (destroyers) mainly for attacking "soft" targets and armor-piercing ammunition for attacking "hard" targets. The demands of war. High aftereffect armor-piercing ammunition is a new type of ammunition with dual characteristics of armor-piercing ammunition and grenade. The core material of this ammunition is unique, not only can penetrate the armor of aircraft and armed helicopters like conventional armor-piercing ammunition, but also the ammunition core shatters durin...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/04
CPCC22C1/045C22C27/04
Inventor 张俊杨晓青李志翔
Owner ZIGONG CEMENTED CARBIDE CORP
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