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Anti-ablation rubber composition used as anti-ablation protective coating in aluminum alloy products, aluminum alloy products and preparation method thereof

A rubber composition and protective coating technology are applied in the field of anti-ablation protection of aluminum alloys, and can solve the problems of thin-walled aluminum alloy closing cylinder body ablation, unsolved problems, failure of anti-ablation protection, and the like. Achieve the effect of low cost, long service life and strong ablation resistance

Active Publication Date: 2020-12-01
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the anti-ablation coatings prepared by traditional methods such as coating resin-based anti-ablation coatings, thermal spraying, anodic oxidation, and micro-arc oxidation have good ablation resistance, they are brittle, and thin-walled aluminum alloys such as bullet cases / cartridges are closed. High strain rate deformation occurs when the cylinder works, and the coating is prone to cracking and peeling off, which leads to the failure of anti-ablation protection
[0004] Judging from the current reports, the problem of ablation of thin-walled aluminum alloy closed barrels such as cartridge cases / cartridges has not yet been well resolved

Method used

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  • Anti-ablation rubber composition used as anti-ablation protective coating in aluminum alloy products, aluminum alloy products and preparation method thereof
  • Anti-ablation rubber composition used as anti-ablation protective coating in aluminum alloy products, aluminum alloy products and preparation method thereof
  • Anti-ablation rubber composition used as anti-ablation protective coating in aluminum alloy products, aluminum alloy products and preparation method thereof

Examples

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Effect test

preparation example Construction

[0091] In a third aspect, in at least one embodiment, a method for preparing an aluminum alloy product is provided, comprising the following steps:

[0092] The anti-ablative rubber composition is first kneaded and then extruded into a thin sleeve through an extruder;

[0093] The thin sleeve is then tightly attached to the inner wall of the cylinder body by means of air bag pressurization to obtain an aluminum alloy product with an anti-ablation protective coating closely attached to the cylinder body.

[0094] In the present invention, the silicone rubber is firstly mixed, then extruded into a thin sleeve through an extruder, and then directly bonded and vulcanized on the inner wall of the thin-walled aluminum alloy closing cylinder by using an air bag to pressurize, and finally obtain a thin-walled aluminum alloy closing Anti-ablation protective rubber layer closely fitted to the barrel. The method is simple, efficient, easy to operate, and easy to control the process. Thi...

Embodiment 1

[0115] An aluminum alloy product, comprising a barrel body and an anti-ablation protective coating attached to the inner surface of the barrel body; the anti-ablation protective coating is mainly made of an anti-ablation rubber composition;

[0116] In terms of parts by mass, the anti-ablation rubber composition is mainly prepared from the following raw materials: 100 parts of methyl vinyl silicone rubber, 6 parts of diphenylsilanediol, 60 parts of white carbon black, 0.5 parts of titanium dioxide and diphenyl peroxide Formyl 1.5 parts.

[0117] The preparation method of the aluminum alloy product comprises the following steps:

[0118] (a) Silicone rubber mixing

[0119] Mix the silicone rubber on a two-roller mixer, the temperature of the rollers is controlled at 50-60°C, the mixing time is 20-30min, and the roller speed is 16r / min;

[0120] ① Wrap 100 parts of methyl vinyl silicone rubber raw rubber;

[0121] ② Add 6 parts of structural control agent diphenylsilanediol; ...

Embodiment 2

[0144] An aluminum alloy product, comprising a barrel body and an anti-ablation protective coating attached to the inner surface of the barrel body; the anti-ablation protective coating is mainly made of an anti-ablation rubber composition;

[0145] In terms of parts by mass, the anti-ablation rubber composition is mainly prepared from the following raw materials: 100 parts of methyl vinyl phenyl silicone rubber, 20 parts of diatomaceous earth, 2 parts of hydroxyl silicone oil, 5 parts of aluminum hydroxide, and 2 parts of chrome green And 3 parts of dicumyl peroxide.

[0146] The preparation method of the aluminum alloy product comprises the following steps:

[0147] (a) Silicone rubber mixing

[0148]Mix the silicone rubber on the kneader, the mixing time is 20-30min, and the paddle speed is 40r / min, 26r / min;

[0149] ① Put 100 parts of raw methyl vinyl phenyl silicone rubber into the kneader;

[0150] ② Add 20 parts of diatomaceous earth as a reinforcing filler;

[0151...

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Abstract

The invention belongs to the technical field of anti-ablation protection of aluminum alloy, and particularly relates to an anti-ablation rubber composition used as an anti-ablation protective coatingin an aluminum alloy product, an aluminum alloy product and a preparation method of the aluminum alloy product. The invention provides an application of the anti-ablation rubber composition as the anti-ablation protective coating in the aluminum alloy product. The aluminum alloy product provided by the invention comprises a cylinder body and an anti-ablation protective coating adhered to the innersurface of the cylinder body, and the anti-ablation protective coating is primarily prepared from an anti-ablation rubber composition. The preparation method provided by the invention can be used todirectly cure modified silicone rubber material on the inner surface of a thin-wall aluminum alloy closing cylinder body; the thin-wall aluminum alloy closing cylinder body is protected from ablationunder the erosion of high-temperature high-pressure gas; and the method is particularly suitable for the anti-ablation protection of bullet shells and the inner surface of a small-caliber cartridge. The anti-ablation rubber composition provided by the invention has the characteristics of low cost, high safety factor and strong anti-ablation capability.

Description

technical field [0001] The invention belongs to the technical field of anti-ablation protection of aluminum alloys, and in particular relates to an anti-ablation rubber composition used as an anti-ablation protective coating in aluminum alloy products, an aluminum alloy product and a preparation method thereof. Background technique [0002] In the fields of aerospace, weapon equipment, automobiles, ships, etc., with the strong requirements of lightweight and integrated design, in the case of unchanged structure, in order to meet the above requirements, the use of aluminum alloy materials instead of steel and copper has become the main one of the technical approaches. However, in some cases, some aluminum alloy products such as aluminum alloy shells, cartridges and other thin-walled aluminum alloy closing cylinders need to withstand high temperature and high pressure gas erosion. Aluminum alloy has a low melting point (around 660°C) and is prone to ablation. In order to solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/08C08L83/04C08K13/02C08K5/5419C08K3/36C08K3/22C08K3/34C08K3/26
CPCC08K3/22C08K3/36C08K5/5419C08K13/02C08K2003/2227C08K2003/2241C08K2201/014C08L83/04C08L83/08C08L2205/025C08K3/34C08K3/26
Inventor 李立李忠盛杨九州付扬帆张昭林陈汉宾代野孙彩云
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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