Protective armor plate and preparation method thereof

Abstract

The invention provides a protective armor plate and a preparation method thereof. The protective armor plate provided by the invention comprises a back plate and a panel compounded on the surface of the back plate, wherein the panel comprises a plurality of B4C ceramic unit plates; the plurality of B4C ceramic unit plates are arranged in an array, the adjacent B4C ceramic unit plates are arranged at intervals, and aluminum pieces are filled between the adjacent B4C ceramic unit plates and on the peripheries of the B4C ceramic unit plates; and one of the two side surfaces in the length direction of the aluminum piece is connected with the back plate. The protective armor plate can achieve weight reduction and efficient bulletproof at the same time.

Description

Technical Field

[0001] The invention relates to the field of bulletproof materials, and in particular to a protective armor plate and a preparation method thereof. Background Art

[0002] Bulletproof armor is a type of protective equipment used to protect personnel or vehicles from damage by firearms, shells, etc. Depending on the use scenario of the armor material, the armor material should have the characteristics of high strength, high hardness, high toughness, impact resistance, and low surface density. However, armor materials generally have the problem of not being able to have both protection and lightness. If you want to enhance protection, you will inevitably increase its thickness, and if you want to enhance its lightness, you will inevitably sacrifice its protective performance. With the development of society, higher and higher requirements are placed on the army's long-range delivery capabilities and the payload capacity of armed helicopters, which puts strict requirements on the weight of equipment. Summary of the invention

[0003] In view of this, the present invention provides a protective armor plate and a preparation method thereof. The protective armor plate provided by the present invention can achieve weight reduction and high-efficiency bulletproof at the same time.

[0004] The present invention provides a protective armor plate, comprising:

[0005] A back plate and a panel compounded on the surface of the back plate;

[0006] in,

[0007] The panel comprises:

[0008] Several B 4 C ceramic unit plate;

[0009] The several B 4 C ceramic unit plates are arranged in an array and adjacent to B 4 C ceramic unit plates are set at intervals, adjacent B 4 C between ceramic unit plates and B 4 C. Aluminum parts are filled around the periphery of the ceramic unit plate;

[0010] One of the two side surfaces of the aluminum component in the length direction is connected to the back plate.

[0011] Preferably, the adjacent B 4 C ceramic unit plates are arranged at equal intervals;

[0012] The adjacent B 4 The spacing between C ceramic unit plates is ≤2mm.

[0013] Preferably, the aluminum part is ZL205A aluminum alloy, 5A06 aluminum alloy or 2024 aluminum alloy.

[0014] Preferably, the B4 C ceramic unit panels account for 76% to 80% of the total weight of the panel, and the remainder is aluminum.

[0015] Preferably, the backboard is an ultra-high molecular weight polyethylene backboard or an aramid backboard.

[0016] The present invention also provides a method for preparing the protective armor plate described in the above technical solution, comprising the following steps:

[0017] S1. Preparation of panels:

[0018] S1a) several B 4 C ceramic unit plates are placed in a low pressure casting mold and arranged in an array, and adjacent B 4 C ceramic unit plate interval setting; B at both ends 4 A gap is left between the C ceramic unit plate and the inner cavity of the low-pressure casting mold;

[0019] S1b) introducing aluminum alloy liquid into the low-pressure casting mold to perform aluminum alloy low-pressure casting process, so that the adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum parts to form B 4 C ceramic unit plate-aluminum component composite;

[0020] S1c) performing T4 heat treatment on the material obtained in step S1b);

[0021] S1d) performing T6 heat treatment on the material obtained in step S1c) to obtain a panel;

[0022] S2. Preparation of protective armor plates:

[0023] Compounding the panel obtained in step S1 with the back panel to obtain a protective armor plate;

[0024] Wherein, one of the two side surfaces of the aluminum part in the length direction of the panel obtained in step S1 is connected to the back plate;

[0025] or

[0026] The following steps are involved:

[0027] K1. Preparation of panels:

[0028] K1a) will be a number of B 4 C ceramic unit plates and aluminum alloy powder are placed in the package respectively, among which some B 4 C ceramic unit plates are arranged in an array and adjacent to B 4 C ceramic unit plate interval setting; adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum alloy powder;

[0029] K1b) sintering treatment, remove the jacket, and obtain B 4 C ceramic unit plate-aluminum component composite;

[0030] K1c) subjecting the material obtained in step K1b) to T4 heat treatment;

[0031] K1d) performing T6 heat treatment on the material obtained in step K1c) to obtain a panel;

[0032] K2. Preparation of protective armor plates:

[0033] Compounding the panel obtained in step K1 with the back panel to obtain a protective armor plate;

[0034] Among them, one of the two side surfaces in the length direction of the aluminum part in the panel obtained in step K1 is connected to the back plate.

[0035] Preferably, in step S1b), the conditions of the aluminum alloy low-pressure casting process are as follows: aluminum alloy liquid temperature 750-800°C, liquid rising pressure 20-30KPa, liquid rising speed 25-45mm / s, filling speed 35-55mm / s, filling pressure 30-45KPa, shrinkage feeding pressure 35-50KPa, holding time 3-5min;

[0036] In step K1b), the sintering treatment conditions are as follows: pressure of 90-300 MPa, temperature of 400-500° C., and time of 0.5-2 h.

[0037] Preferably, in step S1c), the conditions of the T4 heat treatment are: temperature of 540±5°C and time of 10 to 14 hours;

[0038] In step K1c), the conditions of the T4 heat treatment are: temperature of 535±5° C. and time of 10 to 14 hours.

[0039] Preferably, in step S1d), the conditions of the T6 heat treatment are: temperature of 160±5° C. and time of 9 h.

[0040] In step K1d), the conditions of the T6 heat treatment are: temperature of 155±5° C. and time of 9 hours.

[0041] Preferably, in step S1b), the aluminum alloy liquid is ZL205A aluminum alloy liquid or 5A06 aluminum alloy liquid;

[0042] In step K1a), the aluminum alloy powder is 2024 aluminum alloy powder or 5A06 aluminum alloy powder.

[0043] The preparation method of the present invention comprises: 4C ceramic bullet-proof unit plates are closely arranged, and then the ceramics are fastened and prestressed by aluminum alloy casting or powder metallurgy molding, and then a certain heat treatment is performed to produce a multi-unit high-hardness bullet-proof panel, which is then connected to the back plate to produce a density of less than 2.7g / cm 3 Lightweight and high-strength protective armor plates can greatly improve the ability of light infantry fighting vehicles and armed helicopters to resist attacks from small arms and anti-material weapons.

[0044] The material composition and structural form designed by the present invention are proposed for the first time, and the bulletproof effect is significantly better than bulletproof ceramics of the same thickness, reaching the international leading level. Every 1 kg of the bulletproof armor plate involved in the present invention can reduce the weight of light armored vehicles by 1.5 kg and the weight of armed helicopters by 0.8 kg. The weight reduction effect is very obvious, making a useful contribution to improving the long-range delivery capability of my country's light armored vehicles and increasing the payload of armed helicopters. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0046] Figure 1 A schematic diagram of the structure of the protective armor plate provided by the present invention;

[0047] Figure 2 is a schematic diagram of the outer peripheral surface of the panel;

[0048] Figure 3 It is a schematic diagram of material laying in the low pressure casting method;

[0049] Figure 4 For B 4 C. Schematic diagram of the structure of the ceramic unit plate-aluminum component complex;

[0050] Figure 5 Schematic diagram of material laying in powder metallurgy forming method. DETAILED DESCRIPTION

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0052] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0053] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0054] Herein, when it comes to numerical ranges, unless otherwise specified, the numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0055] In this article, when referring to the unit of a data range, if there is a unit only after the right endpoint, it means that the units of the left and right endpoints are the same. For example, 8-12mm means that the units of the left endpoint "8" and the right endpoint "12" are both mm.

[0056] The present invention provides a protective armor plate, comprising:

[0057] A back plate and a panel compounded on the surface of the back plate;

[0058] in,

[0059] The panel comprises:

[0060] Several B 4 C ceramic unit plate;

[0061] The several B 4 C ceramic unit plates are arranged in an array and adjacent to B 4 C ceramic unit plates are set at intervals, adjacent B 4 C between ceramic unit plates and B 4 C. Aluminum parts are filled around the periphery of the ceramic unit plate;

[0062] One of the two side surfaces of the aluminum component in the length direction is connected to the back plate.

[0063] The protective armor plate provided by the present invention comprises a certain number of B 4 C ceramic anti-bullet single unit plates are closely arranged to make multi-unit high-hardness bullet-proof panels, which are then connected to the back plate to produce a density of less than 2.7g / cm 3Lightweight and high-strength protective armor plates have low density, good bulletproof effect, strong resistance to multiple strikes, low cost, and easy mass production. They are suitable for light infantry fighting vehicles and armed helicopters to resist multiple attacks from light weapons and anti-material weapons, and meet the requirements of the development of my country's military equipment.

[0064] See also Figure 1 , Figure 1 A schematic diagram of the structure of the protective armor plate provided by the present invention; wherein 1 is the back plate, 2 is the B 4 C is a ceramic unit plate, 3 is an aluminum part.

[0065] In the present invention, the backboard is preferably a polymer material backboard, specifically an ultra-high molecular weight polyethylene backboard or an aramid backboard. In the present invention, the thickness of the backboard is preferably 8 to 15 mm, specifically 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, or 15 mm.

[0066] In the present invention, the B 4 C ceramic unit panels and aluminum parts together form the panel. Figure 1 As shown, several B 4 C ceramic unit plates are arranged in an array ( Figure 1 is a cross-sectional view, showing only one row), and adjacent B 4 C ceramic unit plates are set at intervals instead of being completely seamlessly fitted, and adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum parts; that is, all B 4 The outer periphery of the C ceramic unit plate is surrounded by aluminum. The outer periphery refers to B 4 C around the ceramic unit plate.

[0067] In the present invention, the B 4 The length of the C ceramic unit plate is preferably 50 to 100 mm, more preferably 50 mm. 4 The width of the C ceramic unit plate is preferably 50 to 100 mm, more preferably 50 mm. 4 The thickness of the C ceramic unit plate is preferably 8 to 12 mm, specifically 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm. Figure 1 As shown, the B 4 The length or width direction of the C ceramic unit plate is parallel to several B 4 C The arrangement direction of the ceramic unit plate, B 4 The thickness direction of the C ceramic unit plate is perpendicular to the above arrangement direction. 4 C ceramic unit plates have the same dimensions.

[0068] In the present invention, the several B 4In the C ceramic unit plate, the adjacent B 4 C ceramic unit plates are arranged at intervals, preferably at equal intervals, that is, each group of adjacent B 4 The gap spacing between the C ceramic unit plates is equal. In the present invention, the adjacent B 4 The spacing between C ceramic unit plates is preferably ≤2 mm.

[0069] In the present invention, adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum parts; that is, each B 4 The periphery (i.e., all four sides) of the C ceramic unit plate are filled with aluminum parts. The periphery refers to the area along several B 4 C The upper and lower surfaces of the ceramic unit plate in the arrangement direction and B 4 C The two sides of the ceramic unit plate in the thickness direction, such as Figure 2 As shown, ① and ② are several B 4 Aluminum parts filled on the upper and lower surfaces of C ceramic unit plate arrangement direction, ③ and ④ are B 4 Aluminum pieces are filled on two sides of the C ceramic unit plate in the thickness direction. In the present invention, along several B 4 The thickness of the aluminum piece filled on the upper and lower surfaces of the C ceramic unit plate in the arrangement direction is preferably 1 to 5 mm, specifically 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. 4 The thickness of the aluminum pieces filled on the two sides of the C ceramic unit plate in the thickness direction is preferably less than 1 mm. 4 The thickness of the aluminum filled between the C ceramic unit plates is the same as that of the above B 4 The spacing between C ceramic unit plates is the same, that is, ≤2mm.

[0070] In the present invention, the aluminum part is an aluminum alloy, preferably a ZL205A aluminum alloy, a 5A06 aluminum alloy or a 2024 aluminum alloy.

[0071] In the present invention, the above B 4 C ceramic unit plate and aluminum parts together form the panel. 4 C ceramic unit panels account for 76% to 80% of the total weight of the panel, and the remainder is aluminum. The above proportions can be 76%, 77%, 78%, 79%, and 80%.

[0072] In the present invention, one of the two side surfaces in the length direction of the aluminum piece is connected to the back plate. 4 The aluminum parts on the periphery of the C ceramic unit plate are regarded as a whole, and the length direction of the aluminum parts corresponds to several B 4C is the arrangement direction of the ceramic unit board. There are two sides, one of which is connected to the back plate. Figure 1 shown.

[0073] In the present invention, the connection between the aluminum member and the back plate is preferably by adhesive film bonding. The type of adhesive film used is not particularly limited, and any conventional adhesive film in the art can be used.

[0074] The present invention provides a method for preparing the protective armor plate described in the above technical solution, characterized in that it comprises the following steps:

[0075] S1. Preparation of panels:

[0076] S1a) put some B 4 C ceramic unit plates are placed in a low pressure casting mold and arranged in an array, and adjacent B 4 C ceramic unit plate interval setting; B at both ends 4 A gap is left between the C ceramic unit plate and the inner cavity of the low-pressure casting mold;

[0077] S1b) introducing aluminum alloy liquid into the low-pressure casting mold to perform aluminum alloy low-pressure casting process, so that the adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum parts to form B 4 C ceramic unit plate-aluminum component composite;

[0078] S1c) performing T4 heat treatment on the material obtained in step S1b);

[0079] S1d) performing T6 heat treatment on the material obtained in step S1c) to obtain a panel;

[0080] S2. Preparation of protective armor plates:

[0081] Compounding the panel obtained in step S1 with the back panel to obtain a protective armor plate;

[0082] Among them, one of the two side surfaces in the length direction of the aluminum part in the panel obtained in step S1 is connected to the back plate.

[0083] [About step S1]:

[0084] S1a) put some B 4 C ceramic unit plates are placed in a low pressure casting mold and arranged in an array, and adjacent B 4 C ceramic unit plate interval setting; B at both ends 4 A gap is left between the C ceramic unit plate and the inner cavity of the low-pressure casting mold.

[0085] In the present invention, preferably, the B 4C ceramic unit plate is dried in advance. In the present invention, the B 4 The drying temperature of the C ceramic unit plate is preferably 160-200° C., specifically 160° C., 170° C., 180° C., 190° C., 200° C. The drying time is preferably 1-2 hours, specifically 1 hour, 1.5 hours, 2 hours.

[0086] In the present invention, the B 4 The length, width and thickness of the C ceramic unit plate are consistent with those described in the previous technical solution and will not be repeated here.

[0087] In the present invention, a low-pressure casting mold is prepared in advance, and the length and width of the mold cavity are made according to the size of the final product, and the thickness is determined by the B used. 4 C is determined by the thickness of the ceramic unit plate.

[0088] The present invention combines several B 4 C ceramic unit plates are placed in a low pressure casting mold and arranged in an array, and adjacent B 4 C ceramic unit plates are arranged at intervals. Among them, adjacent B 4 C ceramic unit plates are arranged at intervals, preferably at equal intervals, that is, adjacent B 4 The gaps between the C ceramic unit plates are equal. The above spacing is set to reserve gaps for subsequent filling of aluminum parts. 4 The spacing between the C ceramic unit plates is consistent with that described in the previous technical solution and will not be repeated here. 4 C ceramic unit plate, the B at both ends 4 A gap is left between the C ceramic unit plate and the inner cavity of the low-pressure casting mold to facilitate the subsequent cladding of aluminum parts on the two end surfaces.

[0089] S1b) introducing aluminum alloy liquid into the low-pressure casting mold to perform aluminum alloy low-pressure casting process, so that the adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum parts to form B 4 C ceramic unit plate-aluminum component composite.

[0090] In the present invention, the aluminum alloy liquid is preferably ZL205A aluminum alloy liquid or 5A06 aluminum alloy liquid.

[0091] In the present invention, the aluminum alloy low-pressure casting process is also called low-pressure aluminum casting / low-pressure casting, which is a casting method in which the aluminum alloy liquid is filled with the aluminum casting mold cavity and solidified under a relatively low pressure (usually 0.06-0.15MPa) to obtain high-quality castings. In the present invention, the conditions of the aluminum alloy low-pressure casting process are preferably as follows: the aluminum alloy liquid temperature is 750-800°C, the liquid rising pressure is 20-30KPa, the liquid rising speed is 25-45mm / s, the filling speed is 35-55mm / s, the filling pressure is 30-45KPa, the shrinkage pressure is 35-50KPa, and the holding time is 3-5min. Among them, the aluminum alloy liquid temperature can be specifically 750°C, 760°C, 770°C, 780°C, 790°C, and 800°C. The liquid raising pressure can be 20KPa, 21KPa, 22KPa, 23KPa, 24KPa, 25KPa, 26KPa, 27KPa, 28KPa, 29KPa, 30KPa. The liquid raising speed can be 25mm / s, 26mm / s, 27mm / s, 28mm / s, 29mm / s, 30mm / s, 31mm / s, 32mm / s, 33mm / s, 34mm / s, 35mm / s, 36mm / s, 37mm / s, 38mm / s, 39mm / s, 40mm / s, 41mm / s, 42mm / s, 43mm / s, 44mm / s, 45mm / s. The filling speed can be specifically 35mm / s, 36mm / s, 37mm / s, 38mm / s, 39mm / s, 40mm / s, 41mm / s, 42mm / s, 43mm / s, 44mm / s, 45mm / s, 46mm / s, 47mm / s, 48mm / s, 49mm / s, 50mm / s, 51mm / s, 52mm / s, 53mm / s, 54mm / s, 55mm / s. The filling pressure can be specifically 30KPa, 31KPa, 32KPa, 33KPa, 34KPa, 35KPa, 36KPa, 37KPa, 38KPa, 39KPa, 40KPa, 41KPa, 42KPa, 43KPa, 44KPa, 45KPa. The shrinkage compensation pressure can be 35KPa, 36KPa, 37KPa, 38KPa, 39KPa, 40KPa, 41KPa, 42KPa, 43KPa, 44KPa, 45KPa, 46KPa, 47KPa, 48KPa, 49KPa, 50KPa. The holding time can be 3min, 4min, 5min. In the present invention, after the aluminum alloy low-pressure casting process, demoulding is performed to obtain B 4 C ceramic unit plate-aluminum component composite.

[0092] Aluminum alloy low pressure casting process is used to form B in the mold 4C The material laying structure of the ceramic unit plate-aluminum component composite body is as follows Figure 3 As shown, 1 is the mold and 2 is B 4 C is a ceramic unit plate, 3 is an aluminum part. 4 C The thickness of the aluminum parts filled on the upper and lower surfaces of the ceramic unit plate arrangement direction, and B 4 The thickness of the aluminum pieces filled on the two sides of the C ceramic unit plate in the thickness direction is consistent with that described in the previous technical solution, and will not be repeated here. 4 The structure of the C ceramic unit plate-aluminum composite body is as follows Figure 4 As shown, where 1 is B 4 C is a ceramic unit plate, 2 is an aluminum part.

[0093] S1c) performing T4 heat treatment on the material obtained in step S1b).

[0094] In the present invention, in step S1b) B is obtained 4 After the C ceramic unit plate-aluminum component composite is formed, a T4 heat treatment is performed on it. In the present invention, the temperature of the T4 heat treatment is preferably 540±5°C, specifically 535°C, 536°C, 537°C, 538°C, 539°C, 540°C, 541°C, 542°C, 543°C, 544°C, 545°C. The holding time of the T4 heat treatment is preferably 10 to 14 hours, specifically 10 hours, 11 hours, 12 hours, 13 hours, 14 hours.

[0095] S1d) performing T6 heat treatment on the material obtained in step S1c) to obtain a panel.

[0096] In the present invention, after the T4 heat treatment in step S1c) is completed, the T6 heat treatment is performed. In the present invention, the temperature of the T6 heat treatment is preferably 160±5°C, specifically 155°C, 156°C, 157°C, 158°C, 159°C, 160°C, 161°C, 162°C, 163°C, 164°C, 165°C. The holding time of the T6 heat treatment is preferably 9h. After the above heat treatment, a panel is obtained.

[0097] [About step S2]:

[0098] S2. Preparing a protective armor plate: Compounding the panel obtained in step S1 with the back plate to obtain a protective armor plate.

[0099] In the present invention, the type and size of the backplane are consistent with those described in the previous technical solution and will not be repeated here.

[0100] In the present invention, one of the two side surfaces of the aluminum part in the length direction of the panel obtained in step S1 is connected to the back plate. 4The aluminum parts on the periphery of the C ceramic unit plate are regarded as a whole, and the length direction of the aluminum parts corresponds to several B 4 C is the arrangement direction of the ceramic unit board. There are two sides, one of which is connected to the back plate. Figure 1 shown.

[0101] In the present invention, the method of compounding the panel obtained in step S1 with the back panel is preferably to bond with an adhesive film.

[0102] The present invention also provides another method for preparing the protective armor plate described in the above technical solution, characterized in that it comprises the following steps:

[0103] K1. Preparation of panels:

[0104] K1a) will be a number of B 4 C ceramic unit plates and aluminum alloy powder are placed in the package respectively, among which some B 4 C ceramic unit plates are arranged in an array and adjacent to B 4 C ceramic unit plate interval setting; adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum alloy powder;

[0105] K1b) sintering treatment, remove the jacket, and obtain B 4 C ceramic unit plate-aluminum component composite;

[0106] K1c) subjecting the material obtained in step K1b) to T4 heat treatment;

[0107] K1d) performing T6 heat treatment on the material obtained in step K1c) to obtain a panel;

[0108] K2. Preparation of protective armor plates:

[0109] Compounding the panel obtained in step K1 with the back panel to obtain a protective armor plate;

[0110] Among them, one of the two side surfaces in the length direction of the aluminum part in the panel obtained in step K1 is connected to the back plate.

[0111] [About step K1]:

[0112] K1a) will be a number of B 4 C ceramic unit plates and aluminum alloy powder are placed in the package respectively, among which some B 4 C ceramic unit plates are arranged in an array and adjacent to B 4 C ceramic unit plate interval setting; adjacent B 4 C between ceramic unit plates and B 4 The periphery of the C ceramic unit plate is filled with aluminum powder.

[0113] In the present invention, preferably, the B 4 C ceramic unit plate is dried in advance. In the present invention, the B 4 The drying temperature of the C ceramic unit plate is preferably 160-200° C., specifically 160° C., 170° C., 180° C., 190° C., 200° C. The drying time is preferably 1-2 hours, specifically 1 hour, 1.5 hours, 2 hours.

[0114] In the present invention, the B 4 The length, width and thickness of the C ceramic unit plate are consistent with those described in the previous technical solution and will not be repeated here.

[0115] In the present invention, the aluminum alloy powder is preferably 2024 aluminum alloy powder or 5A06 aluminum alloy powder.

[0116] In the present invention, the package is prepared in advance, and the length and width of the package are enlarged according to the size of the final panel product, preferably enlarged by 5%. In the present invention, the material of the package is preferably aluminum alloy.

[0117] The above method of the present invention is a powder metallurgy molding method. When discharging the material, a plurality of B 4 C ceramic unit plates and aluminum alloy powder are placed in the package respectively, among which some B 4 C ceramic unit plates are arranged in an array and adjacent to B 4 C ceramic unit plate interval setting; adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum alloy powder, such as Figure 5 As shown, 1 is the package, 2 is B 4 C is a ceramic unit plate, 3 is aluminum alloy powder. To form the above material layer structure, when charging the package, the following operations can be performed: first, a layer of aluminum alloy powder is laid in the package to form an aluminum alloy powder layer; then, a plurality of B 4 C ceramic unit plates are arranged in an array and adjacent to B 4 C ceramic unit plates are arranged at intervals. Among them, adjacent B 4 C ceramic unit plates are arranged at intervals, preferably at equal intervals, that is, adjacent B 4 The gaps between the C ceramic unit plates are equal. The above spacing is set to reserve gaps for the convenience of subsequent filling of aluminum alloy powder. 4 The spacing between the C ceramic unit plates is consistent with that described in the previous technical solution and will not be repeated here. 4 C ceramic unit plate, the B at both ends 4 There is a gap between the C ceramic unit plate and the inner wall of the sleeve to facilitate the subsequent filling of aluminum alloy powder. 4 C ceramic unit plate, in B4 C The gap between the ceramic unit plates and B at both ends 4 The gaps between the C ceramic unit plate and the inner wall of the package are filled with aluminum alloy powder, and then all B 4 A layer of aluminum alloy powder is laid on the top of the C ceramic unit plate, and finally the adjacent B 4 C between ceramic unit plates and B 4 The outer periphery of the C ceramic unit plate is filled with aluminum alloy powder. After laying, the top edge is sealed, that is, the surrounding of the package is sealed. In the present invention, after filling, the aluminum alloy powder is required to have a tap density of 2.0 to 2.4 g / cm 3 , specifically 2.0g / cm 3 , 2.1g / cm 3 , 2.2g / cm 3 , 2.3g / cm 3 , 2.4g / cm 3 .

[0118] K1b) sintering treatment, remove the jacket, and obtain B 4 C ceramic unit plate-aluminum component composite.

[0119] In the present invention, after step K1a), sintering treatment is performed. In the present invention, the pressure of the sintering treatment is preferably 90-300MPa, specifically 90MPa, 100MPa, 110MPa, 120MPa, 130MPa, 140MPa, 150MPa, 160MPa, 170MPa, 180MPa, 190MPa, 200MPa, 210MPa, 220MPa, 230MPa, 240MPa, 250MPa, 260MPa, 270MPa, 280MPa, 290MPa, 300MPa. The temperature of the sintering treatment is preferably 400-500°C, specifically 400°C, 410°C, 420°C, 430°C, 440°C, 450°C, 460°C, 470°C, 480°C, 490°C, 500°C. The sintering time is preferably 0.5 to 2 hours, specifically 0.5 hours, 1 hour, 1.5 hours, or 2 hours. After the sintering, the aluminum alloy powder forms an aluminum alloy that is tightly filled in the B 4 C ceramic unit plate around, so that B 4 C The ceramic unit plate is surrounded by aluminum parts.

[0120] In the present invention, after the above sintering treatment, the jacket is removed to obtain B 4 C ceramic unit plate-aluminum composite. 4 The structure of the C ceramic unit plate-aluminum composite body is as follows Figure 4 shown.

[0121] K1c) subjecting the material obtained in step K1b) to T4 heat treatment.

[0122] In the present invention, in step K1b) B is obtained 4 After the C ceramic unit plate-aluminum component composite is formed, a T4 heat treatment is performed on it. In the present invention, the temperature of the T4 heat treatment is preferably 535±5°C, specifically 530°C, 531°C, 532°C, 533°C, 534°C, 535°C, 536°C, 537°C, 538°C, 539°C, 540°C. The holding time of the T4 heat treatment is preferably 10 to 14 hours, specifically 10 hours, 11 hours, 12 hours, 13 hours, 14 hours.

[0123] K1d) performing T6 heat treatment on the material obtained in step K1c) to obtain a panel.

[0124] In the present invention, after the T4 heat treatment in step K1c) is completed, the T6 heat treatment is performed. In the present invention, the temperature of the T6 heat treatment is preferably 155±5°C, specifically 150°C, 151°C, 152°C, 153°C, 154°C, 155°C, 156°C, 157°C, 158°C, 159°C, 160°C. The holding time of the T6 heat treatment is preferably 9h. After the above heat treatment, a panel is obtained. The structure of the obtained panel is also as shown Figure 4 shown.

[0125] K2. Preparation of protective armor plate: Compounding the panel obtained in step K1 with the back plate to obtain a protective armor plate.

[0126] In the present invention, the type and size of the backplane are consistent with those described in the previous technical solution and will not be repeated here.

[0127] In the present invention, one of the two side surfaces of the aluminum part in the length direction of the panel obtained in step K1 is connected to the back plate. 4 The aluminum parts on the periphery of the C ceramic unit plate are regarded as a whole, and the length direction of the aluminum parts corresponds to several B 4 C is the arrangement direction of the ceramic unit board. There are two sides, one of which is connected to the back plate. Figure 1 shown.

[0128] In the present invention, the method of compounding the panel obtained in step K1 with the back panel is preferably adhesive film bonding.

[0129] The panel in the protective armor plate provided by the present invention is a prestressed single-ceramic composite plate, which is formed by adding a certain amount of B 4C ceramic bulletproof unit plates are closely arranged, and then the ceramics are fastened and prestressed by aluminum alloy casting or powder metallurgy molding, and then a certain heat treatment is performed to prepare a low-density multi-unit high-hardness bulletproof panel, thereby improving the anti-ballistic performance of the ceramics, making it suitable for preparing bulletproof panels for composite armor with the ability to resist multiple strikes, thereby greatly improving the ability of light infantry fighting vehicles and armed helicopters to resist attacks from light weapons and anti-material weapons. The above-mentioned panel of the present invention is suitable for the bulletproof armor layer used by light infantry fighting vehicles and armed helicopters to resist attacks from light weapons and anti-material weapons.

[0130] Compared with the prior art, the present invention has the following beneficial effects:

[0131] 1. Low density and good protective effect. The density of the bulletproof armor plate prepared by the present invention is lower than 2.7g / cm3, which is only one-third of the bulletproof steel plate and two-thirds of the bulletproof titanium alloy plate. After actual target shooting tests, the bulletproof effect and resistance to multiple strikes of the protective armor plate prepared by the present invention are significantly better than those of the bulletproof titanium alloy plate of the same thickness, and are also better than those of the bulletproof steel plate of the same thickness.

[0132] 2. The production cost is low and it is easy to realize industrial preparation. At the same time, the operation process is simple and conducive to production control.

[0133] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0134] Example 1

[0135] S1. Preparation of panels:

[0136] S1a) 36 dried B 4 C ceramic unit plates (length 50mm, width 50mm, thickness 11.7mm) are placed in a low-pressure casting mold and arranged in a 6×6 square array, with adjacent B 4 C ceramic unit plate spacing setting (spacing is 1mm); B at both ends 4 There is a gap between the C ceramic unit plate and the inner cavity of the low-pressure casting mold (the gap spacing is 0.5 mm).

[0137] S1b) introducing aluminum alloy liquid (ZL205A aluminum alloy) into the above-mentioned low-pressure casting mold to perform aluminum alloy low-pressure casting process, so that the adjacent B 4 C between ceramic unit plates and B 4 C The periphery of the ceramic unit plate is filled with aluminum parts, and then demolded to obtain B 4 C ceramic unit plate-aluminum component composite body, wherein the thickness of the upper and lower aluminum alloy layers is 2 mm.

[0138] Among them, the low-pressure casting process conditions are as follows: aluminum alloy liquid temperature 760°C, liquid rising pressure 25KPa, liquid rising speed 30mm / s, filling speed 40mm / s, filling pressure 40KPa, shrinkage compensation pressure 45KPa, and holding time 4min.

[0139] S1c) B obtained in step S1b) 4 The C ceramic unit plate-aluminum component composite body is subjected to T4 heat treatment under the following conditions: temperature 540°C, time 12h.

[0140] S1d) The material obtained in step S1c) is subjected to T6 heat treatment under the following conditions: temperature 160° C., time 9 h. After the above treatment, a panel is obtained.

[0141] S2. Preparation of protective armor plates:

[0142] The panel obtained in step S1 is compounded with the back panel to obtain a protective armor plate.

[0143] Among them, the backboard is an ultra-high molecular weight polyethylene backboard, the length and width of the backboard are the same as the panel, and the thickness of the backboard is 12mm.

[0144] Example 2

[0145] The method is implemented in accordance with Example 1, except that the aluminum alloy material used in step S1b) is replaced with 5A06 aluminum alloy.

[0146] Example 3

[0147] K1a) 36 dried B 4 C ceramic unit plates (length 50 mm, width 50 mm, thickness 11.7 mm) and aluminum alloy powder (2024 aluminum alloy) are respectively placed in the package, among which, several B 4 C ceramic unit plates are arranged in a 6×6 square array and adjacent to B 4 C ceramic unit plates are arranged at intervals (the spacing is the same as in Example 1); B at both ends 4 There is a gap between the C ceramic unit plate and the inner wall of the sleeve (the gap is the same as in Example 1). 4 C between ceramic unit plates and B 4 The outer periphery of the C ceramic unit plate is filled with aluminum alloy powder.

[0148] K1b) was sintered (pressure 200MPa, temperature 450℃, time 1h), and the jacket was removed to obtain B 4 C ceramic unit plate-aluminum component composite; wherein the thickness of the upper and lower aluminum alloy layers is the same as that of Example 1.

[0149] K1c) The B obtained in step K1b) 4The C ceramic unit plate-aluminum component composite body is subjected to T4 heat treatment under the following conditions: temperature 535°C, time 12h.

[0150] K1d) The material obtained in step K1c) is subjected to T6 heat treatment under the following conditions: temperature 155° C., time 9 h. After the above treatment, a panel is obtained.

[0151] K2. Preparation of protective armor plate: same as in Example 1.

[0152] Example 4

[0153] The process is carried out in accordance with Example 3, except that the aluminum alloy powder used in step K1b) is replaced with 5A06 aluminum alloy powder.

[0154] Example 5

[0155] The same method as in Example 3 was used except that B 4 The thickness of the C ceramic unit plate is 12.0 mm.

[0156] The bulletproof effect tests were carried out on the products obtained in Examples 1-5, and the results are shown in Table 1.

[0157] Table 1: Bulletproof effect of the products obtained in Examples 1-5

[0158]

[0159] Note: In Table 1, serial numbers 1-5 correspond to Examples 1-5 respectively. Composite method refers to the B 4 C The forming bonding method between the ceramic unit plate and the aluminum alloy.

[0160] It can be seen that the protective armor plate prepared by the present invention has low density and high-efficiency bulletproof effect.

[0161] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A protective armor plate, characterized in that: include: A back plate and a panel compounded on the surface of the back plate; in, The panel comprises: Several B4C ceramic unit boards; The plurality of B4C ceramic unit plates are arranged in an array and adjacent B4C ceramic unit plates are spaced apart, and aluminum pieces are filled between adjacent B4C ceramic unit plates and around the B4C ceramic unit plates; One of the two side surfaces of the aluminum component in the length direction is connected to the back plate.

2. The protective armor plate according to claim 1, characterized in that: The adjacent B4C ceramic unit plates are arranged at equal intervals; The spacing between adjacent B4C ceramic unit plates is ≤2 mm.

3. The protective armor plate according to claim 1, characterized in that: The aluminum parts are ZL205A aluminum alloy, 5A06 aluminum alloy or 2024 aluminum alloy.

4. The protective armor plate according to claim 1, characterized in that: The B4C ceramic unit plate accounts for 76% to 80% of the total weight of the panel, and the remainder is aluminum.

5. The protective armor plate according to claim 1, characterized in that: The backboard is an ultra-high molecular weight polyethylene backboard or an aramid backboard.

6. A method for preparing a protective armor plate according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Preparation of panels: S1a) placing a plurality of B4C ceramic unit plates in a low-pressure casting mold and arranging them in an array, with adjacent B4C ceramic unit plates spaced apart; leaving gaps between the B4C ceramic unit plates at both ends and the inner cavity of the low-pressure casting mold; S1b) introducing aluminum alloy liquid into the low-pressure casting mold to perform an aluminum alloy low-pressure casting process, so that aluminum parts are filled between adjacent B4C ceramic unit plates and around the B4C ceramic unit plates to form a B4C ceramic unit plate-aluminum part composite; S1c) performing T4 heat treatment on the material obtained in step S1b); S1d) performing T6 heat treatment on the material obtained in step S1c) to obtain a panel; S2. Preparation of protective armor plates: Compounding the panel obtained in step S1 with the back panel to obtain a protective armor plate; Wherein, one of the two side surfaces of the aluminum part in the length direction of the panel obtained in step S1 is connected to the back plate; or The following steps are involved: K1. Preparation of panels: K1a) putting a plurality of B4C ceramic unit plates and aluminum alloy powder into a bag respectively, wherein the plurality of B4C ceramic unit plates are arranged in an array and adjacent B4C ceramic unit plates are arranged at intervals; and aluminum alloy powder is filled between adjacent B4C ceramic unit plates and around the B4C ceramic unit plates; K1b) performing sintering treatment and removing the jacket to obtain a B4C ceramic unit plate-aluminum component composite; K1c) subjecting the material obtained in step K1b) to T4 heat treatment; K1d) performing T6 heat treatment on the material obtained in step K1c) to obtain a panel; K2. Preparation of protective armor plates: Compounding the panel obtained in step K1 with the back panel to obtain a protective armor plate; Among them, one of the two side surfaces in the length direction of the aluminum part in the panel obtained in step K1 is connected to the back plate.

7. The preparation method according to claim 6, characterized in that: In step S1b), the conditions of the aluminum alloy low-pressure casting process are as follows: aluminum alloy liquid temperature 750-800°C, liquid rising pressure 20-30KPa, liquid rising speed 25-45mm / s, filling speed 35-55mm / s, filling pressure 30-45KPa, shrinkage feeding pressure 35-50KPa, holding time 3-5min; In step K1b), the sintering treatment conditions are as follows: pressure of 90-300 MPa, temperature of 400-500° C., and time of 0.5-2 h.

8. The preparation method according to claim 6, characterized in that: In step S1c), the conditions of the T4 heat treatment are: temperature of 540±5°C and time of 10 to 14 hours; In step K1c), the conditions of the T4 heat treatment are: temperature of 535±5° C. and time of 10 to 14 hours.

9. The preparation method according to claim 6, characterized in that: In step S1d), the conditions of the T6 heat treatment are: temperature of 160±5° C. and time of 9 hours. In step K1d), the conditions of the T6 heat treatment are: temperature of 155±5° C. and time of 9 hours.

10. The preparation method according to claim 6, characterized in that: In step S1b), the aluminum alloy liquid is ZL205A aluminum alloy liquid or 5A06 aluminum alloy liquid; In step K1a), the aluminum alloy powder is 2024 aluminum alloy powder or 5A06 aluminum alloy powder.

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