Tungsten alloy and preparation method thereof

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...

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 adopts 92.20%~93.50%W, 4.50%~5.50%Ni, 1.00%~2.00%Fe, 0.05%~0.60%Y 2 o 3 Due to the relatively low W content, the prepared tungsten alloy has a low density, which is not conducive to armor-piercing cores, and because there is only a brittle phase Y in the structure 2 o 3 Particles do not have a certain number of holes, 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.

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