Light-weight aluminum alloy material and application thereof in preparation of bullet shells

An aluminum alloy material, lightweight technology, applied in the field of bullets, can solve problems such as the inability to meet combat requirements, and achieve the effects of improving room temperature and high temperature mechanical properties, reducing weight, and refining crystal structure

Active Publication Date: 2019-03-01
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weight reduction of ammunition is the first to reduce the weight of the cartridge case. The weight of the cartridge case accounts for almost half of the weight of the bullet. The traditional metal cartridge case is made of copper and steel.

Method used

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  • Light-weight aluminum alloy material and application thereof in preparation of bullet shells
  • Light-weight aluminum alloy material and application thereof in preparation of bullet shells
  • Light-weight aluminum alloy material and application thereof in preparation of bullet shells

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] The preparation method of the lightweight aluminum alloy material comprises the following steps:

[0058] S1. Add aluminum to the smelting device, heat until the aluminum melts, add copper, manganese, zinc, titanium, chromium, rare earth, lithium, smelt, pass in protective gas, and refine;

[0059] S2. Spraying the melted material, heat treatment, and cooling to obtain the aluminum alloy material.

Embodiment 1

[0061] This example provides a method for preparing a high-strength and tough aluminum alloy material. The purity of all raw materials is above 99.9%. The composition content of the aluminum alloy material is shown in Table 1. The specific preparation steps are:

[0062] S1. Add aluminum with a purity of 99.99% to the smelting furnace, heat at 780°C until the aluminum is completely melted, then add copper, manganese, zinc, titanium, chromium, rare earth, and lithium in sequence, smelt for 45 minutes, introduce anhydrous nitrogen, and refine for 25 minutes;

[0063] S2. Spray molding the molten material, heat treatment at 460° C. for 1.5 h, and cool to obtain the aluminum alloy material.

Embodiment 2

[0065] This example provides a method for preparing a high-strength and tough aluminum alloy material. The purity of all raw materials is above 99.9%. The composition content of the aluminum alloy material is shown in Table 1. The specific preparation steps are:

[0066] S1. Add aluminum with a purity of 99.99% to the smelting furnace, heat at 800°C until the aluminum is completely melted, then add copper, manganese, zinc, titanium, chromium, rare earth, and lithium in sequence, smelt for 60 minutes, and pass anhydrous nitrogen into it for 20 minutes of refining;

[0067] S2. Spray molding the molten material, heat treatment at 470° C. for 1.0 h, and cool to obtain the aluminum alloy material.

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Abstract

The invention relates to the field of bullets and particularly relates to a light-weight aluminum alloy material and an application thereof in preparation of bullet shells. The aluminum alloy materialincludes, by weight, 4.0-7.0% Zn, 1.0-2.0% of Cu, 0.3-0.7% of Mn, 1.0-2.0% of Li, 0.01-0.05% of rare earths, 0-0.05% of Ti, 0-0.05% of Cr, and Al. The bullet shells have advantages of low density, high specific strength, great anti-corrosion performance and outstanding superplastic forming property, can bear chamber pressure of 400 MPa and instant high temperature of more than 1000 DEG C, can effectively avoid problems of cracking and ablation and can reach more than 1200 m / s in warhead initial speed; compared with a steel bullet shell, the bullet shell is reduced by more than 20% in total mass. The parameters can reach the standard of military, so that the bullet shell made of the aluminum alloy material can successfully replace a copper bullet shell or a steel bullet shell at present, thus reducing the weight of light weapons.

Description

technical field [0001] The invention relates to the technical field of bullets, more specifically, to a lightweight aluminum alloy material and its application in preparing bullet casings. Background technique [0002] Modern warfare has higher and higher requirements for infantry, and the equipment they carry is becoming more and more complete, including communication equipment, support equipment, and weaponry. How to ensure the efficient combat of soldiers is a key point for soldiers to carry lightweight equipment. Among them, light weapons are the core and key. Its weight largely determines the level of individual soldier load and the effective use of combat capabilities. In infantry long-range maneuvering and reconnaissance, the lighter the load, the more conducive to saving the soldiers' physical fitness and improving their combat capabilities. mobility. [0003] At present, the use of lightweight technology to obtain lightweight and high-efficiency bullet casings has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02C22F1/053
CPCC22C1/026C22C21/10C22F1/053
Inventor 范才河范语楠
Owner HUNAN UNIV OF TECH
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