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A lightweight aluminum alloy material and its application in the preparation of bullet casings
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An aluminum alloy material and aluminum alloy technology, applied in the field of bullets, can solve problems such as not being able to meet combat requirements, and achieve the effects of reducing mass, increasing rigidity, and improving strike capability
Active Publication Date: 2021-08-03
HUNAN UNIV OF TECH
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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.
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preparation example Construction
[0057] The preparation method of the lightweight aluminum alloy material comprises the following steps:
[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 anhydrousnitrogen, 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 anhydrousnitrogen 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 technical field of bullets, in particular to a lightweight aluminum alloy material and its application in preparing bullet casings. The composition of the aluminum alloy material includes zinc 4.0~7.0wt.%, copper 1.0~2.0wt.%, manganese 0.3~0.7wt.%, lithium 1.0~2.0wt.%, rare earth 0.01~0.05wt.%, titanium 0~0.05wt.%, Chromium 0~0.05wt.% and Aluminum. The cartridge case made of the material in the present invention has low density, high specific strength, good corrosion resistance and excellent superplastic forming performance, can withstand a chamber pressure of 400 MPa and an instantaneous high temperature above 1000°C, and effectively avoids cracking of the cartridge case, Ablation phenomenon, the initial velocity of the bullet is above 1200m / s, and the overall quality is reduced by more than 20% compared with the steel bullet casing. All parameters meet the military use standards, and can successfully replace the currently used copper and steel bullet casings, 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 ...
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