阅读说明：本技术 一种带有密封层的战斗部活性破片及其制备方法和应用 (Warhead active fragment with sealing layer and preparation method and application thereof ) 是由 赵修臣 李辰昊 谭成文 于 2020-06-08 设计创作，主要内容包括：本发明涉及一种带有密封层的战斗部活性破片及其制备方法和应用,本发明首先通过热压的方式将氟聚物复合材料注入带有内壁格栅的管材中,由于聚合物存在流动性,可以充分配合带有内壁格栅的管材单胞形状,充分密封。其次,氟聚物复合材料在高速碰撞过程中也可激发化学反应,进一步提高毁伤效能。传统带有内壁格栅的管材压入钢制端帽的方法对端帽与管材之间配合存在较高加工精度要求,相比之下氟聚物复合材料热压方法封装可适用不同形状带有内壁格栅的管材,简化工艺,提高生产效率。(The invention relates to a warhead active fragment with a sealing layer and a preparation method and application thereof. Secondly, the fluoropolymer composite material can also stimulate chemical reaction in the high-speed collision process, thereby further improving the damage efficiency. The traditional method for pressing the pipe with the inner wall grating into the steel end cap has higher processing precision requirement on the matching between the end cap and the pipe, and compared with the traditional method for packaging the pipe with the inner wall grating in different shapes by the hot pressing method of the fluoropolymer composite material, the method has the advantages of simplifying the process and improving the production efficiency.)

1. The utility model provides a warhead activity fragment with sealing layer which characterized in that: the active fragment comprises a shell, rare earth hydride, a strong oxidant and a sealing layer; the sealing layer is made of a fluoropolymer composite material, and the raw materials of the fluoropolymer composite material comprise a component A, a component B and a component C; wherein the component A is easily oxidized metal powder, the component A is Ta powder, Al powder or Mg powder, the component B is oxide powder, and the component B is Bi₂O₃Powder or Fe₂O₃Powder, wherein the component C is thermoplastic fluoropolymer, and the component C is THV or PVDF;

calculated by taking the total mass of the fluoropolymer composite material as 100 percent, the mass percent of the easily oxidized metal powder is not less than 30 percent, the mass percent of the thermoplastic fluoropolymer is not less than 15 percent, and the balance is oxide powder;

the inner cavity of the shell is internally provided with a grid, and the inner cavity of the shell is divided into more than two cavities through the grid;

rare earth hydride and strong oxidant are filled in the inner cavity of the shell.

2. A warhead active fragment with a seal according to claim 1 wherein: the particle size of the easily oxidizable metal powder is 1 to 10 μm.

3. A warhead active fragment with a seal according to claim 1 wherein: the particle size of the oxide powder is 0.5-2 μm.

4. A warhead active fragment with a seal according to claim 1 wherein: calculated by taking the total mass of the fluoropolymer composite material as 100 percent, the mass percent of the easily oxidized metal powder is 40 to 50 percent, the mass percent of the thermoplastic fluoropolymer is 16 to 27 percent, and the balance is oxide powder.

5. A warhead active fragment with a seal according to claim 1 wherein: the shell is a hollow cylinder, and a criss-cross grid is arranged in the shell, namely the criss-cross grid divides the inner cavity of the hollow cylinder into four cavities in the axial direction.

6. A warhead active fragment with a seal according to claim 1 wherein: the shell is a hollow cuboid, a criss-cross grid is arranged in the shell, and the criss-cross grid equally divides the inner cavity of the hollow cuboid into four cavities in the height direction of the cuboid.

7. A warhead active fragment with a seal according to claim 1 wherein: the rare earth hydride is cerium hydride or praseodymium hydride, and the particle size is 1-10 μm;

the strong oxidant is ammonium perchlorate;

the rare earth hydride and the strong oxidant are alternately filled in different cavities of the shell;

after filling rare earth hydride and strong oxidant in the shell, sealing the top end and the bottom end of the shell by a sealing layer;

the shell is made of easily-oxidizable metal such as Al or Ta, the wall thickness of the shell is 0.2-1mm, and the wall thickness of the grating is 0.2-1 mm.

8. A method of preparing a warhead active fragment with a sealing layer, the method comprising the steps of:

(1) mixing and granulating the component A, the component B and the component C by a double-screw hot extrusion method; the extrusion temperature during hot extrusion is 180-300 ℃;

(2) heating the particles obtained in the step (2) to a molten state, injecting the heated particles into the bottom end of the shell filled with the rare earth hydride and the strong oxidant obtained in the step (1) by adopting a pressure injection method, and naturally cooling the shell to room temperature; the heating temperature is 185-305 ℃;

(3) filling rare earth hydride and a strong oxidant into different cavities of the shell with the bottom end obtained in the step (2) alternately;

(4) heating the particles obtained in the step (1) to a molten state, injecting the particles into the top end of the shell filled with the rare earth hydride and the strong oxidant obtained in the step (1) by adopting a pressure injection method, naturally cooling the shell to room temperature to obtain the warhead active fragments with the sealing layer, wherein the heating temperature is 185-305 ℃.

9. The application of the warhead active fragments with the sealing layer is characterized in that: the prepared active fragments of the warhead parts are arranged around an explosive column in the warhead parts, when the warhead parts are close to a target, the explosive column is excited to explode to drive the installed active fragments of the warhead parts to impact a penetration target, the shells of the active fragments of the warhead parts deform and break in the penetration process, and hydride and ammonium perchlorate filled in the novel active fragments of the warhead parts are fully mixed and initiated to kill the target.

Technical Field

The invention relates to a warhead active fragment with a sealing layer, a preparation method and application thereof, in particular to a sealing method for a rare earth hydride active fragment packaged in a grid pipe.

Background

The rare earth hydride can also generate violent chemical reaction when contacting with water, releases a large amount of heat, and has huge potential when being used for manufacturing active fragments, particularly applied to combat parts aiming at targets on water. However, rare earth hydrogenated substances are brittle, and rare earth becomes brittle and is broken into fine particles after being burned in a hydrogen atmosphere to generate hydrides, so that the rare earth is required to be encapsulated in a structural shell to ensure the penetration performance of the fragments when the active fragments are prepared. Currently, steel is generally used to prepare tubular shells to be loaded with rare earth hydrides, and the active fragments are prepared by sealing through end caps. The rare earth hydride packaged by the tubular shell has the problems of high reaction critical speed, low filling ratio and the like, and the slow hydrogen release failure of the rare earth hydride in the rare earth hydride cannot be avoided although the end part is sealed by the end cap with the screw thread.

Disclosure of Invention

The invention aims to provide a warhead active fragment with a sealing layer, a preparation method and application thereof. Meanwhile, the method effectively improves the production efficiency and is suitable for large-scale production.

The invention is realized by the following technical scheme.

A warhead active fragment with a sealing layer comprises a shell, rare earth hydride, a strong oxidant and the sealing layer; the sealing layer is made of a fluoropolymer composite material, and the raw materials of the fluoropolymer composite material comprise a component A, a component B and a component C; wherein, the component A is easily oxidized metal powder, preferably Ta powder, Al powder or Mg powder, and the component B is oxide powder, preferably Bi₂O₃Powder or Fe₂O₃Powder, component C is a thermoplastic fluoropolymer, preferably THV or PVDF;

the particle size of the easily oxidized metal powder is 1-10 mu m;

the particle size of the oxide powder is 0.5-2 μm;

calculated by taking the total mass of the fluoropolymer composite material as 100%, the mass percent of the easily oxidized metal powder is not less than 30%, preferably 40% -50%, the mass percent of the thermoplastic fluoropolymer is not less than 15%, preferably 16% -27%, and the balance is oxide powder;

the inner cavity of the shell is internally provided with a grid, and the inner cavity of the shell is divided into more than two cavities through the grid;

the shell is preferably a hollow cylinder, and a crisscross grid is arranged in the shell, namely the crisscross grid divides the inner cavity of the hollow cylinder into four cavities in the axial direction;

the shell is preferably a hollow cuboid, and a criss-cross grid is arranged in the shell, namely the criss-cross grid equally divides the inner cavity of the hollow cuboid into four cavities in the height direction of the cuboid;

the rare earth hydride is preferably cerium hydride or praseodymium hydride, and the particle size is 1-10 μm;

the strong oxidant is preferably ammonium perchlorate;

the rare earth hydride and the strong oxidant are filled in the inner cavity of the shell, preferably, the rare earth hydride and the strong oxidant are alternately filled in different cavities of the shell;

after filling rare earth hydride and strong oxidant in the shell, sealing the top end and the bottom end of the shell by a sealing layer;

the shell is made of easily-oxidizable metal such as Al or Ta, the wall thickness of the shell is 0.2-1mm, and the wall thickness of the grating is 0.2-1 mm.

A method of preparing a warhead active fragment with a sealing layer, the method comprising the steps of:

(1) mixing and granulating the component A, the component B and the component C by a double-screw hot extrusion method; the extrusion temperature during hot extrusion is 180-300 ℃;

(2) heating the particles obtained in the step (2) to a molten state, injecting the heated particles into the bottom end of the shell filled with the rare earth hydride and the strong oxidant obtained in the step (1) by adopting a pressure injection method, and naturally cooling the shell to room temperature; the heating temperature is 185-305 ℃;

(3) filling rare earth hydride and a strong oxidant into different cavities of the shell with the bottom end obtained in the step (2) alternately;

(4) heating the particles obtained in the step (1) to a molten state, injecting the particles into the top end of the shell filled with the rare earth hydride and the strong oxidant obtained in the step (1) by adopting a pressure injection method, naturally cooling the shell to room temperature to obtain the warhead active fragments with the sealing layer, wherein the heating temperature is 185-305 ℃.

The application of the warhead active fragments with the sealing layers is characterized in that a plurality of (generally thousands) warhead active fragments obtained through preparation are arranged around explosive columns in the warhead, when the warhead is close to a target, the explosive columns are excited to explode, the plurality of warhead active fragments installed in a driving mode impact a penetration target, the shell of the warhead active fragments is deformed and broken in the penetration process, hydride and ammonium perchlorate filled in the novel warhead active fragments are fully mixed and initiated, and the target is killed.

The invention has the following beneficial effects:

(1) the invention utilizes the thermoplasticity and high viscosity of the fluoropolymer composite material to inject the composite material into the shell so as to fully seal the metal hydride active fragments.

(2) The invention firstly injects the fluoropolymer composite material into the pipe with the inner wall grating in a hot pressing mode, and the single cell shape of the pipe with the inner wall grating can be fully matched and fully sealed due to the fluidity of the polymer. Secondly, the fluoropolymer composite material can also stimulate chemical reaction in the high-speed collision process, thereby further improving the damage efficiency. The traditional method for pressing the pipe with the inner wall grating into the steel end cap has higher processing precision requirement on the matching between the end cap and the pipe, and compared with the traditional method for packaging the pipe with the inner wall grating in different shapes by the hot pressing method of the fluoropolymer composite material, the method has the advantages of simplifying the process and improving the production efficiency.

Drawings

FIG. 1 shows a grid tube filled with cerium hydride and ammonium perchlorate

FIG. 2 is a schematic view of a fluoropolymer composite sealing grid tube encapsulating rare earth hydride active fragment.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.