阅读说明：本技术 一种抗多发弹密集打击复合装甲制备方法 (Preparation method of multi-bullet-resistant intensive-strike composite armor ) 是由 林文松 张虹 方宁象 崔毅 李晓明 徐彬桓 张国军 于 2020-12-09 设计创作，主要内容包括：一种抗多发弹密集打击复合装甲制备方法,制备方法,包括以下步骤：步骤1)：制备；步骤2)：安装；步骤3)：焊接；步骤4)：压制；将所述防弹陶瓷板D与相应的防弹背板胶黏在一起后,装袋抽至真空,再高温压制成型,形成防弹陶瓷复合装甲。本发明能够实现防弹复合装甲在不同使用环境下抗多发弹密集打击的目标,与现有的人体防护插板或复合装甲的生产方法完全兼容,并能实现系列化、模块化、标准化、轻量化生产,解决陶瓷复合装甲在不同使用环境下抗多发弹的难题。(A preparation method of a multi-bullet-resistant intensive-strike composite armor comprises the following steps: step 1): preparing; step 2): mounting; step 3): welding; step 4): pressing; and (3) gluing the bulletproof ceramic plate D and a corresponding bulletproof back plate together, bagging, pumping to vacuum, and then performing high-temperature compression molding to form the bulletproof ceramic composite armor. The invention can realize the aim of resisting multiple bullets and intensive striking of the bulletproof composite armor in different use environments, is completely compatible with the existing production method of the human body protection plugboard or the composite armor, can realize the serialized, modularized, standardized and lightweight production, and solves the problem of multiple bullets resistance of the ceramic composite armor in different use environments.)

1. The preparation method of the multi-bullet intensive striking resistant composite armor is characterized by comprising the following steps:

step 1): preparing; preparing a bulletproof ceramic (A); preparing an Al-Si/Al-Li bimetallic sleeve (B) matched with the geometric dimension of the bulletproof ceramic (A);

step 2): mounting; heating the Al-Si/Al-Li bimetallic sleeve (B), then putting the bulletproof ceramic (A) into the inner cavity of the heated Al-Si/Al-Li bimetallic sleeve (B), and forming an interference fit between the Al-Si/Al-Li bimetallic sleeve (B) and the bulletproof ceramic (A) after cooling to form a bulletproof unit (C);

step 3): welding; splicing the bullet-resistant units C obtained in the step 2 into a required bulletproof ceramic plate in a steel mould, putting the bulletproof ceramic plate into a vacuum furnace, controlling the heating temperature to only partially melt the outer layer of the Al-Si/Al-Li bimetallic sleeve (B), then welding adjacent bullet-resistant components C together, and cooling to form a complete bulletproof ceramic plate (D);

step 4): pressing; and (3) gluing the bulletproof ceramic plate (D) and the corresponding bulletproof back plate (E), bagging, pumping to vacuum, and performing high-temperature compression molding to form the bulletproof ceramic composite armor.

2. The method for preparing the multi-projectile dense-strike resistant composite armor according to claim 1, wherein: the material of the bulletproof ceramic (A) in the step 1) is alumina, silicon carbide, boron carbide or complex phase ceramic based on the aluminum oxide, the silicon carbide and the boron carbide.

3. The method for preparing the multi-projectile dense-strike resistant composite armor according to claim 1, wherein: the Al-Si/Al-Li bimetallic sleeve (B) in the step 1) comprises an Al-Si alloy sleeve on the outer side and an Al-Li alloy sleeve on the inner side, wherein the mass percent of Si in the Al-Si alloy sleeve is 11-13%, the balance is Al, and the thickness is 0.2-0.5 mm; the mass percent of Li in the Al-Li alloy sleeve is 0.5-1.5%, the balance is Al, and the thickness is 0.5-1.0 mm.

4. The method for preparing the multi-projectile dense-strike resistant composite armor according to claim 1, wherein: heating and interference fit of the bulletproof ceramic (A) in the step 2), wherein when the outer diameter size or the opposite side distance of the bulletproof ceramic (A) is less than or equal to 50mm, the interference magnitude of the inner hole of the Al-Si/Al-Li bimetallic sleeve (B) and the bulletproof ceramic (A) is 0.01-0.02 mm; when the outer diameter size or the opposite side distance of the bulletproof ceramic (A) is larger than 50mm, the interference magnitude of the inner hole of the Al-Si/Al-Li bimetallic sleeve (B) and the bulletproof ceramic (A) is 0.02-0.03 mm.

5. The method for preparing the multi-projectile dense-strike resistant composite armor according to claim 1, wherein: the heating temperature of the Al-Si/Al-Li bimetallic sleeve (B) in the step 3) is 578-588 ℃.

6. The method of making a multiple round projectile resistant dense percussion composite armor according to claim 1, 2 or 3, wherein: the bulletproof back plate in the step 4) is made of ultrahigh molecular weight polyethylene, aramid fiber and carbon fiber plates, and the thickness of the bulletproof back plate is 4-30 mm.

7. The method of making a multiple round projectile resistant dense percussion composite armor according to claim 1, 2 or 3, wherein: and 4) pumping the vacuum bag in the step 4) until the vacuum degree is 0.1-0.5 MPa, wherein the high-temperature pressing forming conditions are that the temperature is 100-135 ℃ and the pressure is 0.5-1.5 MPa.

8. The method of making a multiple round projectile resistant dense percussion composite armor according to claim 1, 2 or 3, wherein: repeating the step 1) and the step 2) to manufacture the bullet-resistant units (C) with different sizes and shapes, and then performing the step 3).

9. The utility model provides a compound armor of anti multiple shot intensive strike which characterized in that: prepared by the preparation method of claims 1-8.

Technical Field

The invention relates to a technology in the field of composite materials, in particular to a preparation method of a multi-bullet-resistant intensive-strike composite armor.

Background

Alumina, silicon carbide, boron carbide have been widely used in various ballistic inserts and composite armor as ballistic ceramics. Due to the inherent brittleness and lower fracture toughness of ceramic materials, various protective materials with ceramic as the core component are generally difficult to achieve a ballistic effect against intensive blows.

In order to improve the performance of multiple bullets resistance, the conventional method is to splice small ceramic plates and then glue the small ceramic plates on the fiber back plate to form a whole plate protective material, however, the whole plate protective material spliced by the small ceramic plates does not have the rigidity of the protective material compounded by large ceramic plates, and in an environment with large temperature change, the close combination of the ceramic and the back plate material cannot be ensured, so the bulletproof performance is lost, and the performance of multiple bullets resistance cannot be mentioned. Thus, despite the technical challenges of resistance to multiple projectiles, the ballistic resistant panels required by the market generally require that the ceramic be a rigid, unitary panel.

The Chinese patent with the application number of CN200510086629.3 discloses a preparation method of a steel honeycomb ceramic sandwich composite bulletproof armor, which adopts a bulletproof steel plate to prepare a honeycomb, fills bulletproof ceramic chips, and is brazed with a metal back plate and a panel to form the composite bulletproof armor. The composite bulletproof armor is substantially equivalent to the situation that the ceramic core plate is wrapped in the bulletproof steel plate, and the surface density limit of a lightweight protective deck cannot be met; additional processing of the ceramic is required due to the dimensional changes of the sintered ceramic; and the flexible preparation method is difficult to adapt to the flexible preparation requirements under different appearance sizes and different protection levels, is inconvenient for large-scale industrial production, and is difficult to be practically applied and popularized.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a preparation method of a multi-bullet resistant intensive striking composite armor, solves the problems in the prior art, can realize the aim of multi-bullet resistant intensive striking of the bulletproof composite armor in different use environments, is completely compatible with the existing production method of a human body protection inserting plate or the composite armor, can realize series, modularization, standardization and lightweight production, and solves the problem of multi-bullet resistance of the ceramic composite armor in different use environments.

The technical purpose of the invention is realized by the following technical scheme: the preparation method of the multi-bullet intensive striking resistant composite armor is characterized by comprising the following steps:

step 1): preparing; preparing a bulletproof ceramic A; preparing an Al-Si/Al-Li bimetallic sleeve B matched with the geometric dimension of the bulletproof ceramic A;

step 2): mounting; heating the Al-Si/Al-Li bimetallic sleeve B, then putting the bulletproof ceramic A into the inner cavity of the heated Al-Si/Al-Li bimetallic sleeve B, and after cooling, forming interference fit between the Al-Si/Al-Li bimetallic sleeve B and the bulletproof ceramic A to form a bullet-resistant unit C;

step 3): welding; splicing the bullet-resistant units C obtained in the step 2 into a required bulletproof ceramic plate in a steel die, putting the bulletproof ceramic plate into a vacuum furnace, controlling the heating temperature to only partially melt the outer layer of the Al-Si/Al-Li bimetallic sleeve B, then welding adjacent bullet-resistant components C together, and cooling to form a complete bulletproof ceramic plate D;

step 4): pressing; and (3) gluing the bulletproof ceramic plate D and the corresponding bulletproof back plate E together, bagging, pumping to vacuum, and then performing high-temperature compression molding to form the bulletproof ceramic composite armor.

As a further preferable technical solution of the present invention, the material of the bulletproof ceramic a in step 1) is alumina, silicon carbide, boron carbide, or a complex phase ceramic based on the same.

As a further preferable technical scheme of the invention, the Al-Si/Al-Li bimetallic sleeve B in the step 1) includes an Al-Si alloy sleeve on the outer side and an Al-Li alloy sleeve on the inner side, wherein the Al-Si alloy sleeve contains 11-13% by mass of Si and the balance of Al, and has a thickness of 0.2-0.5 mm; the mass percent of Li in the Al-Li alloy sleeve is 0.5-1.5%, the balance is Al, and the thickness is 0.5-1.0 mm.

As a further preferable technical scheme of the invention, the bulletproof ceramic a in the step 2) is heated and in interference fit, and when the outer diameter size or the distance between opposite sides of the bulletproof ceramic a is less than or equal to 50mm, the interference magnitude between the inner hole of the Al-Si/Al-Li bimetallic sleeve B and the bulletproof ceramic a is 0.01-0.02 mm; when the outer diameter size or the opposite side distance of the bulletproof ceramic A is larger than 50mm, the interference magnitude of the inner hole of the Al-Si/Al-Li bimetallic sleeve B and the bulletproof ceramic A is 0.02-0.03 mm.

As a further preferable technical scheme of the invention, the heating temperature of the Al-Si/Al-Li bimetallic sleeve B in the step 3) is 578-588 ℃.

As a further preferable technical scheme of the invention, the bulletproof back plate in the step 4) is made of ultra-high molecular weight polyethylene, aramid fiber and carbon fiber plate, and the thickness of the bulletproof back plate is 4-30 mm.

As a further preferable technical scheme of the invention, in the step 4), the vacuum bag is pumped to the vacuum degree of 0.1-0.5 MPa, and the high-temperature press forming conditions are that the temperature is 100-135 ℃ and the pressure is 0.5-1.5 MPa.

As a further preferred technical scheme of the invention, the steps 1) and 2) are repeated to manufacture the bullet-resistant units C with different sizes and shapes, and then the step 3) is carried out

The multiple-bullet intensive strike resistant composite armor is prepared by the preparation method.

In conclusion, the invention has the following beneficial effects:

the ceramic plate is restrained by adopting the double-metal-layer aluminum alloy in an interference fit manner, so that the crack propagation inhibiting capability of the ceramic is improved, and the effect of crushing bullet warheads by the ceramic plate can be fully exerted;

the unitized and standardized double metal layers and the ceramic plate are compounded into one bulletproof unit, the tight connection of a plurality of bulletproof units is realized into an integral bulletproof ceramic plate with required size by utilizing the different melting point characteristics of the double metal layers, and the requirements of different bulletproof grades and different protection areas can be met according to application scenes; the used bimetallic aluminum alloy has small density, high strength and large elastic modulus, thereby realizing serialization, modularization, standardization and lightweight of the bulletproof composite armor and realizing the maintainability of the ceramic composite armor to a certain degree;

the unitized bullet-resistant ceramic units are adopted, so that the capability of resisting the intensive striking of multiple bullets of the ceramic plate is improved; the rigid combination of the bullet-resistant units improves the reliability and stability of the performance of the composite armor in different use environments.

The preparation conditions of the composite armor are completely compatible with the existing production method of the human body protection inserting plate or the composite armor, and the engineered production is easy to realize.

Drawings

FIG. 1 is a schematic representation of several structures of the ballistic resistant ceramic of the present invention;

fig. 2 is a schematic structural view of a bulletproof ceramic sheet according to the present invention;

FIG. 3 is a schematic structural view of the composite armor of the present invention;

FIG. 4 is a schematic view of the connection between the ballistic unit C1 and the ballistic unit C2.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

The invention is described in detail below with reference to the figures and the detailed description. The experimental procedures, in which specific conditions are not specified in the examples, were carried out according to the conventional methods and conditions.

Examples

This example, see FIGS. 1-4; relates to a preparation method of a multi-bullet-resistant intensive-strike composite armor, which comprises the following steps:

step 1: according to the requirements of a certain protective armor: the size is 310mm multiplied by 310mm, the areal density is not more than 40kg/m2, and the three-shot 53-type 7.62mm armor piercing bomb can resist penetration. Preparing a bulletproof ceramic A; preparing an Al-Si/Al-Li bimetallic sleeve B matched with the geometric dimension of the bulletproof ceramic A, wherein the shape of the bulletproof ceramic A is hexagonal, square or columnar, the embodiment adopts a square shape, the dimension is 60.00mm multiplied by 8.50mm, wherein, the Al-Si/Al-Li bimetallic sleeve B has the external dimension of 62.00mm multiplied by 8.50mm, the inner cavity dimension of 59.98mm multiplied by 59.98mm multiplied by 8.50mm, the Al-Si/Al-Li bimetallic sleeve B comprises an Al-Si alloy sleeve at the outer side and an Al-Li alloy sleeve at the inner side, wherein, the Al-Si alloy sheath at the outer side has an alloy component of Si mass fraction of 11.5%, the balance being Al and a thickness of 0.50mm, and the Al-Li alloy sheath at the inner side has an alloy component of Li mass fraction of 1%, the balance being Al and a thickness of 0.80 mm.

Step 2: heating the Al-Si/Al-Li bimetallic sleeve B to 50 ℃ in a furnace, taking out and placing on a workbench; the bulletproof unit C1 is formed by air cooling a square bulletproof ceramic A with the size of 60.00mm multiplied by 8.50mm, in the embodiment, the bulletproof ceramic A is boron carbide ceramic, and an Al-Si/Al-Li bimetallic sleeve B is arranged in an inner cavity of the sleeve B and forms interference fit with the sleeve B.

Repeating the steps 1) and 2), preparing an Al-Si/Al-Li bimetallic sleeve B matched with the geometric dimension of the bulletproof ceramic A, wherein the bulletproof ceramic A is hexagonal or square or columnar, the bulletproof ceramic A is boron carbide ceramic, the embodiment adopts square, and the Al-Si/Al-Li bimetallic sleeve B with the external dimension of 31.00mm multiplied by 62.00mm multiplied by 8.50mm and the inner cavity dimension of 28.98mm multiplied by 59.98mm multiplied by 8.50mm is manufactured, wherein the alloy component of the Al-Si alloy sleeve at the outer side is 11.5 percent by mass of Si, the rest is Al, the thickness is 0.50mm, the alloy component Li of the Al-Li alloy sleeve at the inner side is 1 percent by mass of Al, the rest is Al, the thickness is 0.80mm, the Al-Si/Al-Li bimetallic sleeve is heated to 50 ℃ in a furnace and is taken out and placed on a workbench; and quickly putting the bulletproof ceramic A with the size of 29.00mm multiplied by 60.00mm multiplied by 8.50mm into the inner cavity of the Al-Si/Al-Li bimetallic sleeve B, and forming interference fit between the bulletproof ceramic A and the Al-Si/Al-Li bimetallic sleeve B after air cooling to form a bulletproof unit C2.

And step 3: arranging the bullet-resistant components C1 and C2 in a combined steel die with the inner cavity size of 310mm multiplied by 8.5mm, closely attaching the bullet-resistant components together through the combined die, then placing one of the bullet-resistant components in a vacuum furnace, heating to 582 ℃, preserving heat for 10 minutes, cooling along with the furnace, and taking out to obtain a complete bulletproof ceramic plate D;

and 4, step 4: and gluing the bulletproof ceramic plate D and a bulletproof back plate E with the thickness of 10mm together, bagging, vacuumizing, and performing composite molding at 125 ℃ under the pressure of 0.5MPa to form the bulletproof ceramic composite armor, wherein the bulletproof back plate glue is made of ultra-high molecular weight polyethylene.

Tests show that the surface density of the composite ceramic armor is less than 37kg/m2, the armor is penetrated by a three-shot 53-type 7.62mm armor-piercing combustion bomb without perforation, the maximum deformation (back projection) of the PE back plate is less than 25mm, and the bulletproof requirement is met.

The above embodiments are merely illustrative, and not restrictive, of the present invention, and any simple modifications, equivalent changes and modifications made to the above embodiments in accordance with the technical spirit of the present invention are also within the scope of the technical solution of the present invention.