CN110542351B - Bulletproof helmet and preparation method thereof - Google Patents
Bulletproof helmet and preparation method thereof Download PDFInfo
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- CN110542351B CN110542351B CN201810524254.1A CN201810524254A CN110542351B CN 110542351 B CN110542351 B CN 110542351B CN 201810524254 A CN201810524254 A CN 201810524254A CN 110542351 B CN110542351 B CN 110542351B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H1/00—Personal protection gear
- F41H1/04—Protection helmets
- F41H1/08—Protection helmets of plastics; Plastic head-shields
Abstract
The invention discloses a bulletproof helmet and a preparation method thereof. The bulletproof helmet comprises a macromolecule layer and a thermal spraying coating thermally sprayed on the surface of the macromolecule layer; the material of the high molecular layer is selected from one or the combination of at least two of aramid fiber or ultra-high molecular weight polyethylene; the thermal spray coating is selected from one of a metal coating or a cermet coating. The bulletproof helmet prepared by the double-layer composite structure has excellent performances of comfort, light weight, high strength and high hardness, and particularly has outstanding performance on resisting penetration of bullets; the bulletproof helmet can bear continuous shooting of 10-15 bullets through live ammunition tests, keeps the integrity of the helmet and has excellent puncture resistance.
Description
Technical Field
The invention relates to the field of bulletproof materials, in particular to a bulletproof helmet and a preparation method thereof.
Background
The bulletproof helmet is an important component of individual protective equipment, and after a bullet penetrates through the helmet, the bullet can cause direct fatal injury to a human body. According to data statistics of countries during wars, if soldiers wear the bulletproof helmet on a battlefield, the probability of injury can be reduced by 5%, and the probability of death avoidance is as high as 19%, so that the bulletproof helmet can be used for effectively reducing the casualty rate of the soldiers.
As early as the first and second war, thin helmets are commonly used by various countries as the earliest bulletproof helmets, which are relatively simple to manufacture and low in cost, and have good impact resistance but can only protect against fragments. From the beginning of war, the U.S. improves a helmet and starts to apply a bulletproof helmet in a combined form of a fiber composite inserting plate and the helmet; the bulletproof helmet effectively improves the ballistic protection capability, but increases the overall mass of the helmet and reduces the freedom degree of head movement, so that the helmet has a higher center of gravity, poor harness adaptability and small protection effective area.
Since the 70's of the 20 th century, developed countries, including the united states, began to develop all-fiber composite ballistic helmets. The full-fiber nonmetal helmet has the advantages of comfortable wearing, light weight, high protection level, large protection area and large placing space of communication equipment.
The development of the bulletproof helmet in China lags behind that of bulletproof clothes, and the most main reason is that the bulletproof standard of the bulletproof helmet for police in China is set to be relatively lagged; with the establishment of relevant standards of bulletproof helmets in China and the development and application of high-performance composite material application technology, the development of the bulletproof helmets made of composite materials also begins in the middle of the 90 s of the 20 th century in China; the comprehensive performance of the aramid fiber reinforced composite bulletproof helmet capable of resisting the penetration of a 51-type standard bullet launched by a 54-type pistol and a combat protection helmet mainly preventing ammunition fragments reaches the advanced level of international similar products at that time.
The patent document with the publication number of CN105924957A discloses a bulletproof helmet and a preparation method thereof, wherein the bulletproof helmet comprises a thermoplastic polymer material and a fiber-reinforced composite material, the thermoplastic polymer material comprises one or a mixture of more of nylon, polycarbonate and polypropylene materials, the fiber-reinforced material is one or a mixture of more of carbon fiber, aramid fiber and glass fiber high-performance fiber materials, and the bulletproof helmet is integrally manufactured through an injection molding process; the invention is integrated injection molding, can improve the production efficiency, has better bulletproof capability, can effectively avoid cracking caused by local molding, and enhances the bullet resistance.
Although the bulletproof helmet prepared from the all-fiber nonmetal composite high polymer material has the characteristics of light weight, low gravity center, good comfort, large protection area and the like, the high polymer bulletproof helmet has low strength and hardness, and can only prevent a shell single piece from being scratched but not effectively play a bulletproof role.
Disclosure of Invention
The invention aims to provide a bulletproof helmet and a preparation method thereof. The bulletproof helmet provided by the invention has the advantages of light weight, comfort, large protection area and the like, has high strength, high hardness and bulletproof performance, and is greatly improved in safety performance.
The technical scheme adopted by the invention for realizing the technical purpose is as follows:
a ballistic resistant helmet comprising a polymeric layer and a thermally sprayed coating thermally sprayed on a surface of the polymeric layer; the material of the macromolecule layer is selected from aramid fiber or ultra-high molecular weight polyethylene; the thermal spraying coating is selected from one or the combination of a metal coating or a metal ceramic coating.
The thickness ratio of the thermal spray coating and the polymeric layer affects the weight, center of gravity, strength and hardness of the ballistic helmet.
Wherein, the macromolecule layer is the bottom layer of the bulletproof helmet, the thermal spraying layer is the surface layer of the bulletproof helmet, and the macromolecule layer in the bulletproof helmet faces the head when in use.
Ultra-high molecular weight polyethylene is unbranched linear polyethylene having a molecular weight of 150 ten thousand or more.
The aramid fiber is Kevlar. Kevlar is an aromatic polyamide fiber.
The thickness of the thermal spray coating layer is 0.1-1mm, and the thickness of the polymer layer is 1-20 mm.
The metal coating is made of one or the combination of at least two of stainless steel, nickel-based alloy, copper alloy or aluminum alloy, and the metal ceramic coating is made of one or the combination of at least two of CrC-NiCr, WC-Co, WC-CoCr, diamond-NiCr or diamond-NiCrAl.
Preferably, the material of the macromolecule layer is selected from aramid fiber or ultra-high molecular weight polyethylene, and the thermal spraying layer is selected from one or a combination of at least two of aluminum alloy, CrC-NiCr or WC-CoCr.
The choice of materials for the above-mentioned polymeric layers and thermally sprayed layers can affect the strength and hardness of the ballistic helmet, further affecting its ballistic performance.
The number of the thermal spraying layers is 1-2, and the thickness is 0.1-1 mm.
The number of the thermal spraying coating layers is 2, the thermal spraying coating layers are aluminum alloy/WC-CoCr or aluminum alloy/CrC-NiCr composite coating layers, and the thickness of the thermal spraying coating layers is 0.3-0.5 mm.
Preferably, the thickness of the polymer layer is 2 to 10mm, and the thickness of the thermal spray coating layer is 0.3 to 0.5 mm. The bulletproof helmet prepared in the thickness range has higher strength and hardness, light weight, low center of gravity and better bulletproof performance.
The invention also provides a preparation method of the bulletproof helmet, which comprises the following steps:
(1) preparing a macromolecular layer from the macromolecular material by adopting a hot pressing process;
(2) preparing a thermal spraying coating on the surface of the polymer layer;
(3) and packaging the fabric to obtain the bulletproof helmet.
The method for preparing the thermal spray coating in the step (2) is selected from one of electric arc spraying, flame spraying, plasma spraying and cold spraying.
The preparation method of the macromolecule layer in the step (1) comprises the following steps: pre-forming the material of the macromolecule layer according to a helmet-shaped and designed layering mode and layer number, then putting the pre-formed piece into a mould, and carrying out hot press forming on a press with 100-200t, wherein the temperature in the whole process is not more than 100-200 ℃, and the pressure is maintained at 15-25 MPa.
Preferably, the preparation method of the polymer layer in the step (1) comprises: pre-forming the high polymer material according to a helmet-shaped and designed layering mode and layer number, then putting the pre-formed piece into a mold, carrying out hot press molding on a press of 150t, wherein the temperature in the whole process cannot exceed 150 ℃, the pressure is maintained at 14-17MPa, and taking out the high polymer layer with the thickness of 10mm from the mold for finishing. The technological parameters are adjusted according to the material and the thickness of the macromolecule layer, so that the bulletproof helmet with light weight, low gravity center, good comfort and large protection area is obtained.
In the step (2), the method for preparing the thermal spraying coating is arc spraying, and the process parameters are as follows: the current is 50-150A, the voltage is 10-48V, the air pressure is 0.4-0.8Mpa, the spraying distance is 100-300mm, the speed of the spray gun is 10-300mm/s, and the spraying times of the coating are 10-50 times.
Preferably, the process parameters of the electric arc spraying are as follows: the current is 80-100A, the voltage is 20-30V, the air pressure is 0.5-0.6Mpa, the spraying distance is 150-. The technological parameters are adjusted according to the material and the thickness of the thermal spraying layer, so that the strength and the hardness of the bulletproof helmet are improved, and the bulletproof performance of the bulletproof helmet is further improved.
In the step (2), the method for preparing the thermal spraying coating is flame spraying, and the process parameters are as follows: the flow rate of combustion-supporting gas is 500-1000nl/min, the flow rate of fuel kerosene is 200-600ml/min, the flow rate of a powder feeder is 5-20nl/min, the powder feeding amount is 5-25rpm, the spraying distance is 500mm, the moving speed of a spray gun is 50-500mm/s, and the spraying times of the coating are 10-50 times.
Preferably, the flame spraying process parameters are as follows: combustion-supporting gas O2The flow rate is 700-900 nl/min, the fuel kerosene flow rate is 300-500 ml/min, the air flow rate of a powder feeder is 7-9 nl/min, the powder feeding amount is 14-16 rpm, the spraying distance is 200-450 mm, the moving speed of a flame spray gun is 200-400 mm/s, and the spraying times of the coating are 10-15 times. The technological parameters are adjusted according to the material and the thickness of the thermal spraying layer, so that the strength and the hardness of the bulletproof helmet are improved, and the bulletproof performance of the bulletproof helmet is further improved.
In the step (2), the method for preparing the thermal spraying coating is plasma spraying, and the process parameters are as follows: h2Pressure of 0.2-0.6MPa, Ar pressure of 0.4-0.9MPa, N2The pressure is 0.4-0.9MPa, the voltage is 40-70V, the current is 400-700A, the spraying distance is 100-500mm, the moving speed of the spray gun is 50-500mm/s, and the spraying times of the coating are 10-50 times.
In the step (2), the method for preparing the thermal spraying coating is cold spraying, and the process parameters are as follows: the working gas is nitrogen, the pressure is 1-5MPa, the heating temperature is 100-.
Preferably, the cold spray coating has the following technological parameters: the working gas is nitrogen, the pressure is 3MPa, the heating temperature is 300-500 ℃, the powder feeding speed is 1-3rpm, the spraying distance is 10-30 mm, the spray gun speed is 600-800 mm/s, and the coating spraying times are 10-20 times. The technological parameters are adjusted according to the material and the thickness of the thermal spraying layer, so that the strength and the hardness of the bulletproof helmet are improved, and the bulletproof performance of the bulletproof helmet is further improved.
The bulletproof helmet with the double-layer structure is prepared, the high-molecular-layer structure of the bottom layer is prepared by hot press molding, and the coating with a certain thickness is prepared by using the high-molecular-layer as the substrate through a thermal spraying technology, so that the bulletproof helmet has the characteristics of light weight, low center of gravity, good comfort, large protection area and the like of the high-molecular bulletproof helmet, and the strength and hardness of the bulletproof helmet can be greatly improved integrally to realize the bulletproof function; therefore, the invention has great significance for improving the safety performance of the bulletproof helmet; and experiments prove that the bulletproof helmet prepared by the invention can resist 10-15 bullets of 9mm FMJ RN or 44Magnum bullets without being punctured, so that the bulletproof helmet prepared by the invention has the advantages of high strength, high hardness, bulletproof performance and excellent safety performance.
Drawings
Fig. 1 is a schematic structural view of a bulletproof helmet provided by the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples, which are intended to facilitate the understanding of the invention without limiting it in any way.
As shown in fig. 1, the bulletproof helmet of the present invention includes a polymer layer 1 and a thermally sprayed coating 2 thermally sprayed on the surface of the polymer layer.
The preparation method of the bulletproof helmet provided by the invention comprises the following steps:
(1) preparing a macromolecular layer from the macromolecular material by adopting a hot pressing process;
(2) preparing a thermal spraying coating on the surface of the polymer layer;
(3) and packaging the fabric to obtain the bulletproof helmet.
In order to characterize the bulletproof performance of the bulletproof helmet, the bullet is a 9mm all-metal armor-piercing round-head bullet (FMJ RN) according to the NIJ 0106.01 IIIA standard, the bullet weight is 8.0g, the lowest impact speed is not more than 427m/s or 44 Magnus semi-armor-piercing hollow pointed bullet (Magnum), the bullet weight is 15.6g, and the lowest impact bullet speed is not more than 427 m/s.
Example 1
(1) Preparing a high polymer layer of the bulletproof helmet: performing aramid fiber in a helmet-shaped and designed layering mode and layer number by adopting a hot press molding process, then putting the preformed piece into a mold, performing hot press molding on a press of 150t, wherein the temperature in the whole process cannot exceed 150 ℃, the pressure is maintained at 14MPa, and taking out a polymer layer with the thickness of 10mm from the mold for finishing;
(2) preparation of thermal spray coating for ballistic helmet: and preparing a layer of thermal spraying aluminum alloy coating with the thickness of 0.5mm on the surface of the polymer layer of the bulletproof helmet by adopting electric arc spraying. When the electric arc spraying preparation is carried out, the process parameters are as follows: the current is 80A, the voltage is 20V, the air pressure is 0.5Mpa, the spraying distance is 150mm, the speed of a spray gun is 100mm/s, and the spraying times of the coating are 10 times;
(3) packaging the fabric to obtain the bulletproof helmet;
the following performance tests were carried out on the bulletproof helmet prepared above:
selecting a 9mm all-metal armor round-head bullet (FMJ RN) according to NIJ 0106.01 IIIA standard, wherein the bullet weight is 8.0g, and the lowest impact speed is not more than 427 m/s; carrying out bulletproof test on the bulletproof helmet prepared by the invention by adopting the bullet; the bulletproof helmet prepared can resist the 9mm FMJ RN bullet 12 without being punctured as proved by shooting experiments on the bulletproof helmet by continuously using the 9mm FMJ RN bullet.
Example 2
(1) Preparing a high polymer layer of the bulletproof helmet: performing aramid fiber in a helmet-shaped and designed layering mode and layer number by adopting a hot press molding process, then putting the preformed piece into a mold, performing hot press molding on a press of 150t, wherein the temperature in the whole process cannot exceed 150 ℃, the pressure is maintained at 15MPa, and taking out a polymer layer with the thickness of 10mm from the mold for finishing;
(2) preparation of thermal spray coating for ballistic helmet: preparing a thermal spraying composite coating layer with the thickness of 0.5mm on the surface of a high polymer layer of the bulletproof helmet by adopting electric arc spraying and plasma spraying; wherein the arc spraying is used for preparing an aluminum alloy coating with the thickness of 2mm, and the process parameters are as follows: current 100A, voltage of 30V, air pressure of 0.6Mpa, spraying distance of 250mm, spray gun speed of 200mm/s and coating spraying times of 20 times; the 1mm WC-CoCr coating is prepared by plasma spraying, and the technological parameters are as follows: h2Pressure of 0.2MPa, Ar pressure of 0.9MPa, N2The pressure is 0.9MPa, the voltage is 40V, the current is 400A, the spraying distance is 100mm, the moving speed of a spray gun is 50mm/s, and the spraying times of the coating are 50 times;
(3) and packaging the fabric to obtain the bulletproof helmet.
The following performance tests were carried out on the bulletproof helmet prepared above:
according to NIJ 0106.01 IIIA standard, the bullet is 9mm full metal armor round-head bullet (FMJ RN), the bullet weight is 8.0g, and the lowest impact velocity is not more than 427 m/s. The bullet-proof helmet prepared by the invention is subjected to bullet-proof test by adopting the bullet. The bulletproof helmet prepared can resist the 9mm FMJ RN bullet 13 without being punctured as proved by shooting experiments on the bulletproof helmet by continuously using the 9mm FMJ RN bullet.
Example 3
(1) Preparing a high polymer layer of the bulletproof helmet: performing ultrahigh molecular weight polyethylene according to a helmet-shaped and designed layering mode and layer number by adopting a hot press molding process, then putting the preformed piece into a mold, hot press molding on a press of 150t, wherein the temperature in the whole process cannot exceed 150 ℃, the pressure is maintained at 16MPa, and taking out a high molecular layer with the thickness of 10mm from the mold for finishing.
(2) Preparation of thermal spray coating for ballistic helmet: preparing a layer of thermal spraying aluminum alloy coating with the thickness of 0.5mm on the surface of a polymer layer of the bulletproof helmet by adopting cold spraying; when cold spray coating is carried out, the technological parameters are as follows: the working gas is nitrogen, the pressure is 3MPa, the heating temperature is 300 ℃, the powder feeding speed is 1rpm, the spraying distance is 10mm, the speed of a spray gun is 600mm/s, and the spraying times of the coating are 20 times;
(3) and packaging the fabric to obtain the bulletproof helmet.
The following performance tests were carried out on the bulletproof helmet prepared above:
selecting a 9mm all-metal armor round-head bullet (FMJ RN) according to NIJ 0106.01 IIIA standard, wherein the bullet weight is 8.0g, and the lowest impact speed is not more than 427 m/s; carrying out bulletproof test on the bulletproof helmet prepared by the invention by adopting the bullet; the bulletproof helmet prepared can resist the 9mm FMJ RN bullet 14 without being punctured as proved by shooting experiments on the bulletproof helmet by continuously using the 9mm FMJ RN bullet.
Example 4
(1) Preparing a high polymer layer of the bulletproof helmet: performing ultrahigh molecular weight polyethylene according to a helmet-shaped and designed layering mode and layer number by adopting a hot press molding process, then putting the preformed piece into a mold, hot press molding on a press of 150t, wherein the temperature in the whole process cannot exceed 150 ℃, the pressure is maintained at 17MPa, and taking out a high molecular layer with the thickness of 10mm from the mold for finishing;
(2) preparation of thermal spray coating for ballistic helmet: preparing a layer of thermal spraying aluminum alloy with the thickness of 0.5mm and a CrC-NiCr coating on the surface of a high polymer layer of the bulletproof helmet by adopting cold spraying and plasma spraying; when the 4mm aluminum alloy coating is prepared by cold spray coating, the technological parameters are as follows: the working gas is nitrogen, the pressure is 3MPa, the heating temperature is 500 ℃, the powder feeding speed is 3rpm, the spraying distance is 30mm, the speed of a spray gun is 800mm/s, and the spraying times of the coating are 10 times; the plasma spraying is used for preparing a 1mm CrC-NiCr coating, and the process parameters are as follows: h2Pressure of 0.6MPa, Ar pressure of 0.4MPa, N2The pressure is 0.4MPa, the voltage is 70V, the current is 700A, the spraying distance is 500mm, the moving speed of a spray gun is 500mm/s, and the spraying times of the coating are 10 times;
(3) and packaging the fabric to obtain the bulletproof helmet.
The following performance tests were carried out on the bulletproof helmet prepared above:
selecting a 9mm all-metal armor round-head bullet (FMJ RN) according to NIJ 0106.01 IIIA standard, wherein the bullet weight is 8.0g, and the lowest impact speed is not more than 427 m/s; carrying out bulletproof test on the bulletproof helmet prepared by the invention by adopting the bullet; the bulletproof helmet prepared can resist the 9mm FMJ RN bullet 15 without being punctured as proved by shooting experiments on the bulletproof helmet by continuously using the 9mm FMJ RN bullet.
Example 5
The ballistic helmet as provided in example 2, the thickness of the polymer layer was 2mm and the thickness of the thermally sprayed layer was 0.3 mm.
Preparing a thermal spraying composite coating layer with the thickness of 0.3mm on the surface of a high polymer layer of the bulletproof helmet by adopting electric arc spraying and flame spraying; wherein the electric arc spraying is used for preparing 0.2mm aluminum alloy coating, and the technological parameters are as follows: the current is 100A, the voltage is 30V, the air pressure is 0.6Mpa, the spraying distance is 250mm, the speed of a spray gun is 200mm/s, and the spraying times of the coating are 20 times; the WC-CoCr coating with the thickness of 0.1mm is prepared by flame spraying, and the technological parameters are as follows: combustion-supporting gas O2The flow rate is 700nl/min, the fuel kerosene flow rate is 300ml/min, the gas flow rate of a powder feeder is 7nl/min, the powder feeding amount is 14rpm, the spraying distance is 200mm, the moving speed of a flame spray gun is 200mm/s, and the spraying times of the coating are 15 times.
The prepared bulletproof helmet can resist the 13 shots of the 9mm FMJ RN without being punctured.
Example 6
The ballistic helmet as provided in example 4, a 0.5mm layer of thermal sprayed aluminum alloy and CrC-NiCr coating was prepared on the surface of the polymeric layer of the ballistic helmet using cold spray and flame spray; when the 0.4mm aluminum alloy coating is prepared by cold spray coating, the technological parameters are as follows: the working gas is nitrogen, the pressure is 3MPa, the heating temperature is 500 ℃, the powder feeding speed is 3rpm, the spraying distance is 30mm, the speed of a spray gun is 800mm/s, and the spraying times of the coating are 10 times; the CrC-NiCr coating with the thickness of 0.1mm is prepared by flame spraying, and the process parameters are as follows: combustion-supporting gas O2The flow rate is 900nl/min, the fuel kerosene flow rate is 500ml/min, the gas flow rate of a powder feeder is 9nl/min, the powder feeding amount is 16rpm, the spraying distance is 450mm, the moving speed of a flame spray gun is 400mm/s, and the spraying times of the coating are 10 times.
Example 7
A ballistic resistant helmet as provided in example 1.
Preparing a high polymer layer of the bulletproof helmet: performing aramid fiber in a helmet-shaped and designed layering mode and layer number by adopting a hot press molding process, then putting the preformed piece into a mold, performing hot press molding on a 100t press, wherein the temperature in the whole process cannot exceed 200 ℃, the pressure is maintained at 15MPa, and taking out a polymer layer with the thickness of 10mm from the mold for finishing;
the process parameters of the electric arc spraying are as follows: the process parameters of the electric arc spraying are as follows: the current is 50A, the voltage is 10V, the air pressure is 0.4Mpa, the spraying distance is 100mm, the speed of the spray gun is 10mm/s, and the spraying times of the coating are 50 times.
The prepared bulletproof helmet can resist the 1mm FMJ RN bullet 10 without being punctured.
Example 8
A ballistic resistant helmet as provided in example 2.
Preparing a high polymer layer of the bulletproof helmet: performing aramid fiber in a helmet-shaped and designed layering mode and layer number by adopting a hot press molding process, then putting the preformed piece into a mold, performing hot press molding on a 200t press, wherein the temperature in the whole process cannot exceed 100 ℃, the pressure is maintained at 25MPa, and taking out a polymer layer with the thickness of 10mm from the mold for finishing;
the process parameters of the electric arc spraying are as follows: the current is 150A, the voltage is 48V, the air pressure is 0.8Mpa, the spraying distance is 300mm, the speed of the spray gun is 300mm/s, and the spraying times of the coating are 10 times. The technological parameters of flame spraying are as follows: combustion-supporting gas O2The flow rate is 500nl/min, the fuel kerosene flow rate is 200ml/min, the gas flow rate of a powder feeder is 5nl/min, the powder feeding amount is 5rpm, the spraying distance is 100mm, the moving speed of a spray gun is 50mm/s, and the spraying times of the coating are 50 times.
The prepared bulletproof helmet can resist the 1mm FMJ RN bullet 10 without being punctured.
Example 9
A ballistic resistant helmet as provided in example 3.
The technological parameters during cold spraying are as follows: the working gas is nitrogen, the pressure is 4MPa, the heating temperature is 400 ℃, the powder feeding speed is 1rpm, the spraying distance is 25mm, the spray gun speed is 300mm/s, and the coating spraying times are 5 times.
The prepared bulletproof helmet can resist the 1mm FMJ RN bullet 10 without being punctured.
Example 10
A ballistic resistant helmet as provided in example 4.
The technological parameters of flame spraying are as follows: combustion-supporting gas O2The flow rate is 1000nl/min, the fuel kerosene flow rate is 600ml/min, the gas flow rate of a powder feeder is 20nl/min, the powder feeding amount is 25rpm, the spraying distance is 500mm, the moving speed of a spray gun is 500mm/s, and the coating is sprayedThe number of coating passes was 10. The technological parameters of cold spraying are as follows: the working gas is nitrogen, the pressure is 5MPa, the heating temperature is 700 ℃, the powder feeding speed is 10rpm, the spraying distance is 35mm, the speed of the spray gun is 300mm/s, and the spraying times of the coating are 10 times.
The prepared bulletproof helmet can resist the 1mm FMJ RN bullet 10 without being punctured.
Example 11
The ballistic helmet as provided in example 1, the thickness of the polymer layer was 20mm and the thickness of the thermally sprayed layer was 1 mm.
The prepared bulletproof helmet can resist the 12-shot FMJ RN of 9mm without being punctured.
Example 12
The ballistic helmet as provided in example 1, the thickness of the polymeric layer was 1mm and the thickness of the thermally sprayed coating was 0.1 mm.
The prepared bulletproof helmet can resist the 9mm FMJ RN bullet 11 without being punctured.
Claims (1)
1. A ballistic resistant helmet comprising a polymeric layer and a thermally sprayed coating thermally sprayed on a surface of the polymeric layer; the material of the macromolecule layer is selected from aramid fiber or ultra-high molecular weight polyethylene; the thermal spraying coating is selected from one or the combination of a metal coating or a metal ceramic coating;
the thickness of the high molecular layer is 10mm, and the thickness of the thermal spraying layer is 0.5 or 1 mm; or the thickness of the macromolecule layer is 2mm, and the thickness of the thermal spraying layer is 0.3 mm;
the thermal spraying coating is a composite coating of aluminum alloy, aluminum alloy and CrC-NiCr or WC-CoCr;
the preparation method of the bulletproof helmet comprises the following steps:
(1) preparing a macromolecular layer from the macromolecular material by adopting a hot pressing process;
(2) preparing a thermal spraying coating on the surface of the polymer layer;
(3) adopting fabric packaging to obtain a bulletproof helmet;
the preparation method of the macromolecule layer in the step (1) comprises the following steps: pre-forming a high polymer material according to a helmet-shaped and designed layering mode and layer number, then putting the pre-formed piece into a mold, carrying out hot press forming on a press of 150t, wherein the temperature in the whole process cannot exceed 150 ℃, the pressure is maintained at 14-17MPa, and taking out the high polymer layer with the thickness of 10mm from the mold for finishing;
in the step (2), the method for preparing the thermal spraying coating is arc spraying, and the process parameters of the arc spraying are as follows: the current is 80-100A, the voltage is 20-30V, the air pressure is 0.5-0.6Mpa, the spraying distance is 150-;
or the like, or, alternatively,
in the step (2), the method for preparing the thermal spray coating is flame spraying, and the process parameters of the flame spraying are as follows: combustion-supporting gas O2The flow rate is 700-900 nl/min, the fuel kerosene flow rate is 300-500 ml/min, the air flow of a powder feeder is 7-9 nl/min, the powder feeding amount is 14-16 rpm, the spraying distance is 200-450 mm, the moving speed of a flame spray gun is 200-400 mm/s, and the spraying times of the coating are 10-15 times;
or the like, or, alternatively,
in the step (2), the method for preparing the thermal spraying coating is cold spraying, and the process parameters of the cold spraying are as follows: the working gas is nitrogen, the pressure is 3MPa, the heating temperature is 300-500 ℃, the powder feeding speed is 1-3rpm, the spraying distance is 10-30 mm, the spray gun speed is 600-800 mm/s, and the coating spraying times are 10-20 times.
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| CN114657792A (en) * | 2022-03-17 | 2022-06-24 | 瑞安市博安防刺穿材料科技有限公司 | Production process of anti-puncture insole cloth |
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| CN103819705A (en) * | 2012-11-16 | 2014-05-28 | 波音公司 | Thermal spray coated reinforced polymer composites |
| CN105420656A (en) * | 2015-11-27 | 2016-03-23 | 中国科学院宁波材料技术与工程研究所 | Metal/polymer composite coating and manufacturing method thereof |
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| US5880042A (en) * | 1994-07-28 | 1999-03-09 | Akzo Nobel Nv | Clothing for protection against stab and bullet wounds |
| CN201045890Y (en) * | 2007-06-06 | 2008-04-16 | 周厚勇 | A bulletproof helmets |
| CN103540890A (en) * | 2012-07-09 | 2014-01-29 | 中国科学院微电子研究所 | Preparation method of boron carbide-silicon carbide composite coating |
| CN103819705A (en) * | 2012-11-16 | 2014-05-28 | 波音公司 | Thermal spray coated reinforced polymer composites |
| CN105420656A (en) * | 2015-11-27 | 2016-03-23 | 中国科学院宁波材料技术与工程研究所 | Metal/polymer composite coating and manufacturing method thereof |
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