CN113483607B - Composite material long rod bullet with high penetration capability and preparation method thereof - Google Patents

Abstract

The invention discloses a composite material long rod bullet with high penetration capability and a preparation method thereof, wherein the composite material long rod bullet comprises a minor-diameter tungsten rod, a zirconium-based metal glass layer and a multi-circle tungsten fiber layer; the zirconium-based metal glass layer is coated outside the minor-diameter tungsten rod, the multiple circles of tungsten fiber layers are arranged in the zirconium-based metal glass layer, the multiple circles of tungsten fiber layers are sequentially sleeved outside the minor-diameter tungsten rod from inside to outside, and the outer edge of the minor-diameter tungsten rod is contacted with the tungsten fiber layer at the innermost circle; each circle of the tungsten fiber layer comprises a plurality of tungsten fibers which are in mutual contact and are connected end to end. The composite material long rod bullet solves the technical problems of bending deformation of tungsten fibers and softening of a metal glass matrix in the penetration process of the existing tungsten fiber metal glass-based composite material.

Description

Composite long-rod projectile with high penetration ability and preparation method thereof

technical field

The present invention relates to a long-rod bullet, in particular, to a composite material long-rod bullet with high penetration ability and a preparation method thereof.

Background technique

As a typical kinetic energy weapon, armor-piercing projectile has developed rapidly and has become an effective anti-tank projectile due to its advantages of high power, good anti-bounce performance, ideal after-effect and effective destruction of composite armor. However, with the development of protective armor and the energy level limitation of the current launch system, the damage ability of armor-piercing projectiles is gradually declining.

In order to improve the penetration ability as much as possible under the limited launch ability, tungsten or depleted uranium are mostly used as materials for armor-piercing projectiles in the military field. Compared with the "mushroom head" of tungsten alloy, depleted uranium will have a self-sharpening behavior during the penetration process, so it has a stronger penetration ability. However, depleted uranium has been fully resisted due to radiation hazards to humans and the environment.

With the development of material science, the emergence of metallic glass has broken this situation, a typical example of which is the armor-piercing projectile of tungsten fiber zirconium matrix composite material. The tungsten fiber zirconium-based composite armor-piercing projectile also exhibits self-sharpening behavior during the armor-piercing process, and its penetration ability is 10% to 20% higher than that of the tungsten alloy projectile. However, in the process of research, it was found that in the remaining projectile after penetration, there was an "edge layer" at the head; the reinforced tungsten fibers in the edge layer were bent and deformed at a large angle; the metal glass matrix was softened, causing the projectile to break and deform. broken. Although the head edge layer reflects the localized effect of the deformation/destruction of the composite projectile, the bending deformation of the tungsten fiber reduces the penetration ability of the projectile.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a composite material long-rod projectile with high penetration ability and a preparation method thereof, so as to solve the problems of bending deformation of tungsten fibers and softening of metal glass matrix existing in tungsten fiber metal glass matrix composite materials in the prior art. technical problem.

In order to achieve the above object, the present invention provides a composite material long rod bullet with high penetration ability, the composite material long rod bullet comprises a secondary diameter tungsten rod, a zirconium-based metal glass layer and a multi-circle tungsten fiber layer; the zirconium The base metal glass layer is covered on the outside of the secondary diameter tungsten rod, the multi-circle tungsten fiber layer is arranged in the zirconium-based metal glass layer, and the multi-circle tungsten fiber layer is sequentially sleeved on the Outside the secondary diameter tungsten rod, the outer edge of the secondary diameter tungsten rod is in contact with the tungsten fiber layer of the innermost circle; each circle of the tungsten fiber layer includes a plurality of tungsten fibers that are in contact with each other and connected end to end.

As a preferred technical solution of the present invention, the zirconium-based metallic glass layer contains zirconium-based metallic glass, the secondary diameter tungsten rod and the tungsten fiber are cylindrical; along the radial direction of the secondary diameter tungsten rod, the The cross section of the zirconium-based metallic glass layer is circular; two adjacent circles of the tungsten fiber layers are in contact with each other.

As a preferred technical solution of the present invention, the composite material long rod is a uniform long rod bullet, the secondary diameter tungsten rod is a first secondary diameter tungsten rod, and the zirconium-based metal glass layer is a first zirconium rod The base metal glass layer, the tungsten fiber layer is the first tungsten fiber layer; in the multiple circles of the first tungsten fiber layer, the diameters of the tungsten fibers are all the same.

As a preferred technical solution of the present invention, the diameter of the first diameter tungsten rod is 3-5mm, the thickness of the first zirconium-based metal glass layer is 3-5mm, and the ring of the first tungsten fiber layer is 3-5mm. The number is 6-8 circles, and the diameter of the tungsten fiber is 290-310um.

As a preferred technical solution of the present invention, the number of turns of the first tungsten fiber layer is 7, and the diameter of the tungsten fiber is 295-305um.

As a preferred technical solution of the present invention, the composite material long rod is a gradient long rod, the secondary diameter tungsten rod is a second secondary diameter tungsten rod, and the zirconium-based metal glass layer is a second zirconium-based Metal glass layer, the tungsten fiber layer is the second tungsten fiber layer; along the direction from the center of the second diameter tungsten rod to the outer edge, the tungsten fibers in each circle of the second tungsten fiber layer The diameter gradually decreases; in the same circle of the tungsten fiber layer, the diameter of the tungsten fibers is the same.

As a preferred technical solution of the present invention, the diameter of the second diameter tungsten rod is 3-5mm, the thickness of the second zirconium-based metal glass layer is 3-5mm, and the ring of the second tungsten fiber layer is 3-5mm. The number is 6-8 circles, the diameter of the thickest tungsten fiber is 390-410um, and the diameter of the thinnest tungsten fiber is 140-160um.

As a preferred technical solution of the present invention, the number of turns of the second tungsten fiber layer is 7, and along the direction from the center of the second diameter tungsten rod to the outer edge, each turn of the second tungsten fiber The diameters of the tungsten fibers in the layer are 395-405um, 345-355um, 295-305um, 270-280um, 245-255um, 195-205um, 145-155um in sequence.

As a preferred technical solution of the present invention, the volume fraction of the total volume of the tungsten fibers in the composite long rod projectile is 75-85%, the secondary diameter tungsten rod, the multi-circle tungsten fiber layers and the The weight ratio of the zirconium-based metallic glass layer is 1:2.38-2.44:0.22-0.26.

As a preferred technical solution of the present invention, the aspect ratio of the composite long rod bullet is 8-12.

The present invention also provides a preparation method of the above-mentioned composite material long-rod projectile with high penetration ability, the preparation method comprising:

1) arranging the tungsten fiber on the outside of the secondary diameter tungsten rod, and filling the zirconium-based metallic glass between the tungsten fiber and the secondary diameter tungsten rod;

2) The system is successively vacuumized, heated, pressurized, pressure-maintained, heat-preserved, and cooled.

As a preferred technical solution of the present invention, the vacuum degree of the system after the evacuation is 10 ^-3 -10 ^-4 Mpa; the temperature rise includes heating the system from 290-295K to 800-1300K, preferably 1100-1150K ; The pressurization includes pressurizing the system to 0.5-0.9MPa; the time of the pressure maintaining and heat preservation is 5-15min; the cooling is cooling with the furnace.

In the above technical solution, in the present invention, the composite long rod bullet includes a secondary diameter tungsten rod, a zirconium-based metal glass layer and a multi-circle tungsten fiber layer. The inventor found through creative research that the secondary diameter tungsten rod is arranged in the middle, A plurality of tungsten fibers are arranged in the form of tungsten fiber layers, and the multi-circle tungsten fiber layers are sequentially sleeved on the secondary diameter tungsten rods from the inside to the outside; while the zirconium-based metallic glass is filled between the tungsten fibers, the secondary diameter tungsten rods and the phase between them. Between adjacent tungsten fibers, a zirconium-based metallic glass layer is formed. The above arrangement of the secondary diameter tungsten rod, zirconium-based metallic glass and tungsten fiber is obtained by the inventor through creative work, and this arrangement ensures that the penetration strength of the projectile head area will not be reduced due to the bending deformation of the tungsten fiber; It can also avoid the occurrence of the breaking and breaking of the projectile caused by the softening of the zirconium-based glass metal matrix, thereby ensuring that the long-rod projectile has excellent penetration ability.

According to the different diameters of the tungsten fibers in each tungsten fiber layer, the composite long rod bullet can be divided into a uniform long rod bullet and a gradient long rod bullet. Among them, the diameters of the tungsten fibers in the uniformly distributed long rod bullet are all the same; while in the gradient long rod bullet, along the direction from the center of the second diameter tungsten rod to the outer edge, the tungsten fibers in each circle of tungsten fiber layers The diameter of the tungsten fibers gradually decreases. Since the target interface pressure will decay from the center of the long-rod projectile head to the edge of the crater during the penetration process, when the reinforced tungsten fibers with the outer diameter are distributed in a gradient form from the inside to the outside (ie, a gradient long-rod projectile), its " Self-sharpening is stronger, which in turn increases the penetration depth.

In addition, compared with the traditional tungsten fiber reinforced zirconium-based composite material structure with the same diameter (as shown in Figure 5, including zirconium-based metallic glass and multiple tungsten fibers, the small circles in the figure represent tungsten fibers), the composite material in the present invention The sub-diameter tungsten rod is used in the long rod bullet, which reduces the use of tungsten fiber and metal glass, thereby reducing the production cost.

Thus, compared with the prior art, the present invention has at least the following technical advantages:

1. It avoids the reduction of penetration strength in the head area of the projectile due to the bending and deformation of tungsten fibers; it also avoids the softening of the zirconium-based glass metal matrix, which leads to the fracture and fragmentation of the projectile, thus ensuring that the long-rod projectile has excellent penetration abilities; especially the gradient longshot.

2. The usage of tungsten fiber and metallic glass is reduced, thereby reducing the production cost.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the structural representation of a kind of preferred embodiment of the uniform distribution long rod bomb provided by the present invention;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 is the structural representation of a kind of preferred embodiment of the gradient type long rod bomb provided by the present invention;

Fig. 4 is the sectional view of Fig. 3;

Fig. 5 is the structural representation of the tungsten fiber reinforced zirconium-based composite long-rod projectile in the prior art;

Fig. 6 is the penetrating topography in detection example 1;

Figure 7 is a comparison diagram of the equivalent plastic strain of the long-rod projectile head in Test Example 2;

FIG. 8 is a comparison diagram of the crater depth and diameter of the long target plate in Test Example 3. FIG.

Detailed ways

Specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

The invention provides a composite material long rod bullet with high penetration ability, the composite material long rod bullet comprises a sub-diameter tungsten rod, a zirconium-based metal glass layer and a multi-circle tungsten fiber layer; the zirconium-based metal glass layer wraps Covered on the outside of the second diameter tungsten rod, the multi-circle tungsten fiber layer is arranged in the zirconium-based metal glass layer, and the multi-circle tungsten fiber layer is sleeved inside and outside the second diameter tungsten rod in sequence. Externally, the outer edge of the second-diameter tungsten rod is in contact with the tungsten fiber layer of the innermost circle; each circle of the tungsten fiber layer includes a plurality of tungsten fibers that are in contact with each other and connected end to end.

Among them, the "secondary diameter" in the secondary diameter tungsten rod means that the diameter of the central tungsten rod is smaller than the diameter of the overall long rod.

In the present invention, the composition of the zirconium-based metallic glass layer, the shape of the layered diameter tungsten rod and the fiber layer, the shape of the zirconium-based metallic glass, and the distribution between the two adjacent tungsten fiber layers are not specified. However, in order to further improve the penetration ability of the composite long rod projectile, preferably, the zirconium-based metallic glass layer contains zirconium-based metallic glass, and the secondary diameter tungsten rods and the tungsten fibers are cylindrical; In the radial direction of the second diameter tungsten rod, the cross section of the zirconium-based metal glass layer is a circular ring; the adjacent two circles of the tungsten fiber layers are in contact with each other. Therefore, the composite long rod is cylindrical as a whole, and the secondary diameter tungsten rod and the tungsten fiber are also cylindrical. The two adjacent tungsten fiber layers are in contact with each other, and the tungsten fiber layer and the secondary diameter tungsten rod They are also in contact with each other, thus ensuring that the tungsten fiber is less likely to be bent and deformed during the penetration process, and the zirconium-based glass metal matrix is less likely to soften, which further ensures the penetration ability of the long-rod projectile.

In the present invention, the diameters of each of the tungsten fibers may be the same or different. In order to facilitate the arrangement of the tungsten fibers, preferably, the composite long rod bullet is a uniform long rod bullet, and the secondary diameter The tungsten rod is the first diameter tungsten rod 3, the zirconium-based metallic glass layer is the first zirconium-based metallic glass layer 2, and the tungsten fiber layer is the first tungsten fiber layer 1; In layer 1, the diameters of the tungsten fibers are all the same. In this embodiment, all the tungsten fibers have the same diameter, thereby reducing the difficulty in arranging the tungsten fibers, thereby improving the production efficiency.

In the above embodiment, the diameter of the first diameter tungsten rod 3, the thickness of the first zirconium-based metallic glass layer 2, the number of turns of the first tungsten fiber layer 1, and the diameter of the tungsten fiber No specific limitation is made, but considering the frequency of use of long rods of different sizes and in order to ensure the penetration ability of long rods, preferably, as shown in Figure 1-2, the first diameter of the tungsten rod 3 is considered. The diameter is 3-5mm, the thickness of the first zirconium-based metallic glass layer 2 is 3-5mm, the number of turns of the first tungsten fiber layer 1 is 6-8 turns, and the diameter of the tungsten fiber is 290-310um ; More preferably, the number of turns of the first tungsten fiber layer 1 is 7, and the diameter of the tungsten fiber is 295-305um, along the direction from the center of the first tungsten rod 3 to the outer edge, The number of tungsten fibers in the first tungsten fiber layer 1 of each circle is 43-45, 50-52, 56-58, 62-64, 68-70, 73-75 and 80-82 respectively .

Wherein, the number of turns of the first tungsten fiber layer 1 is the optimal number of turns in 6-8 turns, which is obtained by the inventor through creative work, and the 6-8 turns of the first tungsten fiber layer 1 can guarantee Long-rod projectiles have the best penetration capability.

Of course, in addition to the uniformly distributed long-rod projectile, the composite long-rod projectile can also use other ways to arrange the components. Considering that during the penetration process, the target interface pressure will be from the center of the long-rod projectile head to the edge of the crater. In order to further improve the penetration ability of the composite material long rod bullet, preferably, the composite material long rod bullet is a gradient long rod bullet, and the secondary diameter tungsten rod is the second diameter tungsten rod 6, The zirconium-based metallic glass layer is the second zirconium-based metallic glass layer 5, and the tungsten fiber layer is the second tungsten fiber layer 4; The diameters of the tungsten fibers in the second tungsten fiber layer 4 gradually decrease; in the same circle of the tungsten fiber layers, the diameters of the tungsten fibers are the same.

In the gradient long rod bullet, along the direction from the center of the second diameter tungsten rod 6 to the outer edge, the diameter of the tungsten fibers in each circle of the second tungsten fiber layer 4 gradually decreases, and the During the penetration process, the closer the second tungsten fiber layer 4 of the second diameter tungsten rod bears the greater the target interface pressure, the inventor found that the larger the diameter of the tungsten fiber, the more Therefore, the gradient long-rod projectile can have stronger penetration ability. In addition, in the same circle of the tungsten fiber layer, the diameter of the tungsten fiber may be the same or different, but in order to facilitate the distribution of the tungsten fiber, the diameter of the tungsten fiber in the same circle of the tungsten fiber layer is the same. distribution.

In the above embodiment, the diameter of the second diameter tungsten rod 6, the thickness of the second zirconium-based metallic glass layer 5, the number of turns of the second tungsten fiber layer 4, and the diameter of the tungsten fiber No specific limitation is made, but considering the frequency of use of long rods of different sizes, and in order to further improve the penetration ability of the gradient long rods, preferably, the diameter of the second diameter tungsten rod 6 is 3- 5mm, the thickness of the second zirconium-based metallic glass layer 5 is 3-5mm, the number of turns of the second tungsten fiber layer 4 is 6-8 turns, and the diameter of the thickest tungsten fiber is 390-410um, The thinnest said tungsten fibers have a diameter of 140-160um.

Wherein, the number of turns of the second tungsten fiber layer 4 is the optimal number of turns in 6-8 turns, which is obtained by the inventor through creative work, and the 6-8 turns of the second tungsten fiber layer 4 can guarantee The gradient long shot has the best penetration ability. At the same time, the diameter of the tungsten fibers in the second tungsten fiber layer 4 in each circle is also obtained by the inventor through creative work. The diameter of the thickest tungsten fibers is 390-410um, and the diameter of the thinnest tungsten fibers For 140-160um, the gradient long rod projectile has the best penetration ability.

On the basis of the above-mentioned embodiment, in order to further improve the penetration ability of the gradient long-rod projectile, preferably, the number of turns of the second tungsten fiber layer 4 is 7 turns, along the second diameter of the tungsten rod 6 From the center of the circle to the outer edge, the diameters of the tungsten fibers in the second tungsten fiber layer 4 in each circle are 395-405um, 345-355um, 295-305um, 270-280um, 245-255um, 195- 205um, 145-155um; along the direction from the center to the outer edge of the first diameter tungsten rod 3, the number of tungsten fibers in the first tungsten fiber layer 1 in each circle is 33-35 and 44-46 respectively. , 59-61 root, 65-67 root, 84-86 root, 112-114 root and 159-161 root.

In the above embodiment, the contents of the secondary diameter tungsten rod, the multi-circle tungsten fiber layer and the zirconium-based metallic glass layer can be selected in a wide range, but in order to further improve the penetration of the composite long rod projectile capacity, preferably, the volume fraction of the total volume of the tungsten fibers in the composite long rod projectile is 75-85%, the secondary diameter tungsten rod, the multi-circle tungsten fiber layer and the zirconium-based metal The weight ratio of the glass layers is 1:2.38-2.44:0.22-0.26.

In the above-mentioned embodiment, the aspect ratio of the composite long-rod projectile can be selected in a wide range, but in order to further improve the penetration ability of the composite long-rod projectile, preferably, the composite long-rod projectile The aspect ratio is 8-12.

The present invention also provides a preparation method of the above-mentioned composite material long-rod projectile with high penetration ability, the preparation method comprising:

1) arranging the tungsten fiber on the outside of the secondary diameter tungsten rod, and filling the zirconium-based metallic glass between the tungsten fiber and the secondary diameter tungsten rod;

2) The system is successively vacuumized, heated, pressurized, pressure-maintained, heat-preserved, and cooled.

In the above preparation method, the technology of "pressure-penetration-rapid solidification" can make the combination between tungsten fiber, zirconium-based metallic glass and sub-diameter tungsten rod more stable, thereby improving the penetration ability of long rod projectile .

Wherein, in the above-mentioned preparation method, the vacuum degree of the system after the vacuuming can be in a wide range, but in order to further improve the penetration ability of the long-rod bomb, preferably, the vacuum degree ^of the system after the vacuuming is 10- ^{3-10-4 Mpa} .

In the above preparation method, the conditions for the temperature increase can be in a wide range, but in order to further improve the penetration ability of the long-rod projectile, preferably, the temperature increase includes heating the system from 290-295K to 800-1300K, more preferably It is 1100-1150K, more preferably 1120-1125K.

In the above preparation method, the pressurizing conditions can be in a wide range, but in order to further improve the penetration ability of the long-barreled bullet, preferably, the pressurizing includes pressurizing the system to 0.5-0.9 MPa.

In the above preparation method, the time of the pressure keeping and heat preservation can be in a wide range, but in order to further improve the penetration ability of the long-barreled bullet, preferably, the time of the pressure keeping and heat preservation is 5-15min.

In the above preparation method, the cooling method can be in a wide range, but in order to further improve the penetration ability of the long-barreled bullet, preferably, the cooling is cooling with the furnace.

The present invention will be described in detail below by way of examples. In the following example, the tungsten fiber is the product of the Chinese Academy of Sciences Institute of Metals trade mark 95W, the secondary diameter tungsten rod is the product of the Chinese Academy of Sciences Institute of Metals trade mark 95WNiFe, and the zirconium-based metallic glass is the Chinese Academy of Sciences Institute of Metals The product of trade mark VIT-1, The diameter of the secondary diameter tungsten rod is 4mm.

Example 1

As shown in Fig. 1-2, 7 circles of the first tungsten fiber layer 1 are sequentially sleeved on the outside of the first diameter tungsten rod 3 from the inside to the outside, and then the first tungsten fiber layer 1 and the first tungsten fiber layer 1 and the first tungsten fiber layer 1 and the first tungsten fiber layer 1 are filled with zirconium-based metallic glass. A first zirconium-based metallic glass layer 2 is formed between the primary diameter tungsten rods 3 and the adjacent first tungsten fiber layers 1 .

The first diameter tungsten rod 3, the zirconium-based metallic glass and the first tungsten fiber layer 1 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-3 MPa, and then the temperature is raised from 293K to 1123K, and then pressurized to 0.6Mpa, then kept for 10min under heat preservation and pressure, and finally cooled with the furnace to make uniform long-rod bombs.

Wherein, the diameter of the tungsten fiber is 300um, and along the direction from the center to the outer edge of the first diameter tungsten rod 3, the number of tungsten fibers in each circle of the first tungsten fiber layer 1 is 44 and 51 respectively. root, 57, 63, 69, 74 and 84; the first diameter tungsten rod 3, all tungsten fibers, the weight ratio of zirconium-based metallic glass is 1:2.41:0.24; the total weight of the tungsten fibers The volume fraction of the uniformly distributed long rod bullet is 80%; the size of the uniformly distributed long rod bullet is: 80mm in length and 8mm in diameter.

Example 2

Carry out according to the method of embodiment 1, the only difference is:

The first diameter tungsten rod 3, the zirconium-based metallic glass and the first tungsten fiber layer 1 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-4 MPa, and then the temperature is raised from 293K to 1120K, and then pressurized to 0.5Mpa, then kept for 15min under heat preservation and pressure, and finally cooled with the furnace to make uniform long-rod bombs.

Example 3

Carry out according to the method of embodiment 1, the only difference is:

The first diameter tungsten rod 3, the zirconium-based metallic glass and the first tungsten fiber layer 1 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-4 MPa, and then the temperature is raised from 293K to 1125K, and then pressurized to 0.9Mpa, then kept for 5min under heat preservation and pressure, and finally cooled with the furnace to make uniform long-rod bombs.

Example 4

Carry out according to the method of embodiment 1, the only difference is:

The first diameter tungsten rod 3, the zirconium-based metallic glass and the first tungsten fiber layer 1 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-3 MPa, and then the temperature is raised from 293K to 800K, and then pressurized to 0.6Mpa, then kept for 10min under heat preservation and pressure, and finally cooled with the furnace to make uniform long-rod bombs.

Example 5

Carry out according to the method of embodiment 1, the only difference is:

The first diameter tungsten rod 3, the zirconium-based metallic glass and the first tungsten fiber layer 1 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-3 MPa, and then the temperature is raised from 293K to 1300K, and then pressurized to 0.6Mpa, then kept for 10min under heat preservation and pressure, and finally cooled with the furnace to make uniform long-rod bombs.

Example 6

Carry out according to the method of embodiment 1, the only difference is:

The first tungsten fiber layer 1 is 6 circles, the diameter of the tungsten fiber is 350um, along the direction from the center to the outer edge of the first diameter tungsten rod 3, the tungsten fibers in the first tungsten fiber layer 1 of each circle are The numbers are 38, 43, 48, 53, 57 and 62 respectively; the weight ratio of the first diameter tungsten rod 3, all tungsten fibers, and zirconium-based metallic glass is 1:2.41:0.24; The volume fraction of the total volume of the tungsten fibers in the uniformly distributed long rod bullet is 80%; the size of the uniformly distributed long rod bullet is: 80 mm in length and 8 mm in diameter.

Example 7

The first tungsten fiber layer 1 is 8 circles, the diameter of the tungsten fiber is 250um, along the direction from the center of the first tungsten rod 3 to the outer edge, the tungsten fiber in the first tungsten fiber layer 1 of each circle is The numbers are 47, 54, 58, 64, 71, 76, 82 and 88 respectively; the weight ratio of the first diameter tungsten rod 3, all tungsten fibers, and zirconium-based metallic glass is 1 : 2.41: 0.24; the volume fraction of the total volume of the tungsten fibers in the uniformly distributed long rod bullet is 80%; the size of the uniformly distributed long rod bullet is: 80 mm in length and 8 mm in diameter.

Example 8

As shown in Fig. 3-4, 7 circles of the second tungsten fiber layer 4 are sequentially sleeved on the outside of the second diameter tungsten rod 6 from the inside to the outside, and then the zirconium-based metallic glass is filled on the second tungsten fiber layer 4 and the second tungsten fiber layer 4 and the second diameter tungsten rod 6. The second diameter tungsten rods 6 and the adjacent second tungsten fiber layers 4 are formed to form the first zirconium-based metallic glass layer 2 .

The second diameter tungsten rod 6, the zirconium-based metallic glass and the second tungsten fiber layer 4 are all fixed in the mold, the mold is put into the crucible and sealed, and then the crucible is evacuated until the crucible is evacuated to 1×10 ^-3 MPa , and then heated from 293K to 1123K, then pressurized to 0.6Mpa, then kept for 10min under heat preservation and pressure, and finally cooled with the furnace to obtain a gradient long-rod bomb.

Wherein, along the direction from the center of the first diameter tungsten rod 3 to the outer edge, the diameters of the tungsten fibers in the second tungsten fiber layer 4 in each circle are 400um, 350um, 300um, 275um, 250um in turn. , 200um and 150um, the number of tungsten fibers in the second tungsten fiber layer 4 in each circle is 34, 45, 60, 66, 85, 113 and 160 respectively; the second diameter tungsten rods 6, The weight ratio of all tungsten fibers and zirconium-based metallic glass is 1:2.41:0.24; the volume fraction of the total volume of the tungsten fibers in the uniformly distributed long-rod bullet is 80%; the size of the uniformly-distributed long-rod bullet is: The length is 80mm and the diameter is 8mm.

Example 9

Carry out according to the method of embodiment 8, the only difference is:

The second diameter tungsten rod 6, the zirconium-based metallic glass and the second tungsten fiber layer 4 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-4 MPa, and then the temperature is raised from 293K to 1120K, and then pressurized to 0.5Mpa, then kept for 15min under heat preservation and pressure, and finally cooled with the furnace to obtain a gradient long-rod bomb.

Example 10

Carry out according to the method of embodiment 8, the only difference is:

The second diameter tungsten rod 6, the zirconium-based metallic glass and the second tungsten fiber layer 4 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-4 MPa, and then the temperature is raised from 293K to 1125K, and then pressurized to 0.9Mpa, then kept for 5min under heat preservation and pressure, and finally cooled with the furnace to obtain a gradient long-rod bomb.

Example 11

Carry out according to the method of embodiment 8, the only difference is:

The second diameter tungsten rod 6, the zirconium-based metallic glass and the second tungsten fiber layer 4 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-3 MPa, and then the temperature is raised from 293K to 800K, and then pressurized to 0.6Mpa, then kept under pressure for 10min, and finally cooled with the furnace to obtain a gradient long-rod bomb.

Example 12

Carry out according to the method of embodiment 8, the only difference is:

The second diameter tungsten rod 6, the zirconium-based metallic glass and the second tungsten fiber layer 4 are all fixed in the mold, the mold is put into the crucible and sealed, then the crucible is evacuated to 1×10 ^-3 MPa, and then the temperature is raised from 293K to 1300K, and then pressurized to 0.6Mpa, then kept under pressure for 10min, and finally cooled with the furnace to obtain a gradient long-rod bomb.

Example 13

Carry out according to the method of embodiment 8, the only difference is:

Wherein, the number of turns of the second tungsten fiber layer 4 is 6 turns, and along the direction from the center of the first diameter tungsten rod 3 to the outer edge, the The diameters of the tungsten fibers are 450um, 400um, 350um, 300um, 250um and 200um in sequence, and the number of tungsten fibers in the second tungsten fiber layer 4 in each circle is 32, 41, 58, 64, 81 and 120 respectively. root; the second diameter tungsten rod 6, the weight ratio of all tungsten fibers and zirconium-based metallic glass is 1:2.41:0.24; the volume fraction of the total volume of the tungsten fibers in the uniform long rod bullet is 80% ; The size of the uniformly distributed long rod bullet is: the length is 80mm and the diameter is 8mm.

Example 14

Carry out according to the method of embodiment 8, the only difference is:

Wherein, the number of turns of the second tungsten fiber layer 4 is 8, and along the direction from the center of the first diameter tungsten rod 3 to the outer edge, the The diameters of the tungsten fibers are 400um, 375um, 350um, 300um, 275um, 250um, 200um and 150um in sequence, and the number of tungsten fibers in the second tungsten fiber layer 4 in each circle is 32, 41, 57, 61, 76, 83, 98 and 116; the weight ratio of the second diameter tungsten rod 6, all tungsten fibers, and zirconium-based metallic glass is 1:2.41:0.24; the total volume of the tungsten fibers is uniformly distributed. The volume fraction of the long rod bullet is 80%; the size of the uniform long rod bullet is: 80mm in length and 8mm in diameter.

Comparative Example 1

As shown in Figure 5, 568 tungsten fibers and zirconium-based metallic glass were fixed in the mold, the mold was put into the crucible and sealed, then the crucible was evacuated to ^10-3 MPa, then the temperature was raised from 293K to 1123K, and then Pressurize to 0.6Mpa, then keep the temperature and pressure for 10min, and finally cool with the furnace to obtain the tungsten fiber reinforced zirconium-based composite long-rod bomb.

Wherein, the diameter of the tungsten fibers is 300um; the weight ratio of all the tungsten fibers and the zirconium-based metallic glass is 1:0.09; the volume fraction of the total volume of the tungsten fibers in the uniform long-rod bullet is 80%; The size of the uniformly distributed long rod bullet is: the length is 80mm and the diameter is 8mm.

Comparative Example 2

Carry out according to the method of embodiment 1, the only difference is:

The first tungsten fiber layer 1 is 3 circles, the diameter of the tungsten fiber is 600um, along the direction from the center of the first tungsten rod 3 to the outer edge, the tungsten fiber in the first tungsten fiber layer 1 of each circle is The numbers are 21, 33 and 42 respectively; the weight ratio of the first diameter tungsten rod 3, all tungsten fibers, and zirconium-based metallic glass is 1:2.41:0.24; the total volume of the tungsten fibers is evenly distributed The volume fraction of the long rod bullet is 80%; the size of the uniform long rod bullet is: 80mm in length and 8mm in diameter.

Comparative Example 3

Carry out according to the method of embodiment 1, the only difference is:

The first tungsten fiber layer 1 is 10 circles, the diameter of the tungsten fiber is 200um, along the direction from the center of the first tungsten rod 3 to the outer edge, the tungsten fiber in the first tungsten fiber layer 1 of each circle is The numbers are 62, 66, 69, 73, 78, 84, 90, 97, 102 and 108; the first diameter tungsten rod 3, all tungsten fibers, zirconium-based metal The weight ratio of glass is 1:2.41:0.24; the volume fraction of the total volume of the tungsten fibers in the uniformly distributed long-rod bullet is 80%; the size of the uniformly-distributed long-rod bullet is 80 mm in length and 8 mm in diameter.

Comparative Example 4

Carry out according to the method of embodiment 8, the only difference is:

The number of turns of the second tungsten fiber layer 4 is 3 turns, and along the direction from the center of the first diameter tungsten rod 3 to the outer edge, the tungsten fibers in the second tungsten fiber layer 4 each turn. The diameters are 800um, 600um and 400um in sequence, the number of tungsten fibers in the second tungsten fiber layer 4 in each circle is 15, 25 and 42 respectively; the second diameter tungsten rod 6, all tungsten fibers, zirconium base The weight ratio of the metallic glass is 1:2.41:0.24; the volume fraction of the total volume of the tungsten fibers in the uniformly distributed long rod bullet is 80%; the size of the uniformly distributed long rod bullet is: the length is 80mm, and the diameter is 8mm .

Comparative Example 5

Carry out according to the method of embodiment 8, the only difference is:

The number of turns of the second tungsten fiber layer 4 is 10. Along the direction from the center of the first diameter tungsten rod 3 to the outer edge, the tungsten fibers in the second tungsten fiber layer 4 each turn. The diameters are 400um, 375um, 350um, 325um, 300um, 275um, 250um, 225um, 200um and 150um, and the number of tungsten fibers in the second tungsten fiber layer 4 in each circle is 31, 37, 43, 51 6, 58, 67, 77, 89, 101 and 115; the second diameter tungsten rod 6, all tungsten fibers, and zirconium-based metallic glass have a weight ratio of 1:2.41:0.24; the tungsten The volume fraction of the total volume of fibers in the uniformly distributed long rod bullet is 80%; the size of the uniformly distributed long rod bullet is 80 mm in length and 8 mm in diameter.

Test Example 1

Finite element analysis software was used to analyze the penetration morphology of tungsten alloy long-rod projectiles (80 mm in length and 8 mm in diameter), the uniformly distributed long-rod projectiles prepared in Example 1, and the gradient long-rod projectiles prepared in Example 8. The results are shown in Figure 6, where part a represents the tungsten alloy long-rod bullet, b represents the uniform long-rod bullet prepared in Example 1, and c represents the gradient long-rod bullet prepared in Example 8.

Test example 2

Using finite element analysis software, the equivalent plastic strain of the tungsten alloy long-rod projectile (length is 80 mm, diameter is 8 mm), the uniform long-rod projectile prepared in Example 1, and the gradient long-rod projectile prepared in Example 8 are subjected to the equivalent plastic strain. For detection, compare the legend value and cloud map distribution in the calculation results. The results are shown in Figure 7, where part a represents the comparison of the tungsten alloy long-rod projectile (on the left of the figure) and the uniform long-rod projectile (on the right of the figure). In the figure, b represents the comparison of the uniformly distributed long-rod projectile (on the left of the figure) and the gradient long-rod projectile (on the right of the figure), c represents the tungsten alloy long-rod projectile (on the left of the figure) and the gradient long-rod projectile (on the figure Right) comparison chart.

From the comparison of the above figure, it can be seen that the order of "self-sharpening" ability is: gradient long shot > uniform distribution long shot > traditional tungsten fiber reinforced zirconium matrix composite long shot > tungsten alloy long shot.

Test Example 3

The finite element analysis software was used to analyze the target crater depth of the tungsten alloy long-rod projectile (length 80mm, diameter 8mm), the uniform long-rod projectile prepared in Example 1, and the gradient long-rod projectile prepared in Example 8. The results are shown in Figure 8, where part a represents the comparison of the tungsten alloy long-rod projectile (on the left of the figure) and the uniformly distributed long-rod projectile (on the right of the figure), and b represents the uniformly distributed long-rod projectile (on the left of the figure). ) and the gradient long-rod projectile (located on the right of the figure), c represents the comparison of the tungsten alloy long-rod projectile (on the left of the figure) and the gradient long-rod projectile (on the right of the figure).

In the figure, W represents a tungsten alloy long-rod bomb, ND represents a sub-uniform long-rod bomb, and GD represents a gradient long-rod bomb, wherein the crater radius and penetration depth formed by W are represented as D _W and P _W respectively; ND forms The radius of the crater and the depth of penetration are respectively expressed as D _ND and P _ND ; the radius of the crater and the depth of penetration formed by GD are respectively expressed as D _GD and P _GD ; then the increase rate p of the penetration depth and the decrease of the radius of the crater by d The calculation process is: p=( _PGD - _PW )/ _PW , d=( _DGD - _DW )/ _DW .

Among them, the smaller the crater radius, the deeper the penetration depth, indicating that the penetration ability of the long-rod projectile is stronger. In FIG. 8 , DW is 6.00 mm, PW is 21.10 mm, DND is 4.80 mm, PND is 23.20 mm, DGD is 4.40 mm, and PGD is 24.70 mm. Compared with the penetration depth and crater diameter caused by the tungsten alloy long shot, the uniform long shot increases the depth by 10.1% and the crater diameter by 20%, and the gradient long shot increases the depth by 17.1%, and the crater The diameter is reduced by 26.7%. The results show that the long-rod bullets provided by the present invention all improve the self-sharpening ability and increase the penetration depth. Among them, the gradient long-rod bullet has the strongest "self-sharpening" ability.

According to the same method, the crater radius and penetration depth of the long-barreled projectiles of Examples 2-7, 9-14 and Comparative Examples 1-6 were tested, and the results are shown in Table 1.

Table 1

According to the comparison of the above table, it can be seen from the comparison of Example 4-5 and Example 1-3 and the comparison of Example 11-12 and Example 8-10 that the heating temperature is 1120-1125K, which is the optimal temperature, and the heating temperature has a significant effect on the long The penetration ability of the rod projectile has a significant effect.

It can be seen from the comparison of Comparative Examples 2-3 with Examples 1-7 and the comparison of Comparative Examples 4-5 with Examples 8-14 that the number of turns of the tungsten fiber layer is 6-8 is the optimal number of turns, and the number of turns of the tungsten fiber layer is 6-8. The number of turns also has a significant effect on the penetration ability of the long shot.

It can be seen from the comparison between Comparative Example 1 and Examples 1-14 that the penetration ability of the uniformly distributed long rod bullet and the gradient long rod bullet provided by the present invention is stronger than that of the tungsten fiber reinforced zirconium-based composite long rod bullet.

The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. These simple modifications All belong to the protection scope of the present invention.

In addition, it should be noted that the specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner unless they are inconsistent. In order to avoid unnecessary repetition, the present invention provides The combination method will not be specified otherwise.

Claims (13)

1. A composite material long rod bullet with high penetration capability is characterized by comprising a minor-diameter tungsten rod, a zirconium-based metallic glass layer and a multi-ring tungsten fiber layer; the zirconium-based metal glass layer is coated outside the minor-diameter tungsten rod, the multiple circles of tungsten fiber layers are arranged in the zirconium-based metal glass layer, the multiple circles of tungsten fiber layers are sequentially sleeved outside the minor-diameter tungsten rod from inside to outside, and the outer edge of the minor-diameter tungsten rod is in contact with the tungsten fiber layer at the innermost circle; each circle of the tungsten fiber layer comprises a plurality of tungsten fibers which are mutually contacted and connected end to end;

the secondary-diameter tungsten rod and the tungsten fiber are cylindrical; the cross section of the zirconium-based metallic glass layer is circular along the radial direction of the minor-diameter tungsten rod; and two adjacent circles of the tungsten fiber layers are in contact with each other.

2. The composite long rod bullet with high penetration ability according to claim 1, wherein said zirconium based metallic glass layer comprises zirconium based metallic glass.

3. The composite long rod bullet with high penetration capability according to claim 2, wherein the composite long rod bullet is a uniform distribution type long rod bullet, the minor diameter tungsten rod is a first minor diameter tungsten rod (3), the zirconium-based metallic glass layer is a first zirconium-based metallic glass layer (2), and the tungsten fiber layer is a first tungsten fiber layer (1); the diameters of the tungsten fibers are the same in the multiple turns of the first tungsten fiber layer (1).

4. The composite long rod bullet with high penetration capability according to claim 3, wherein the diameter of the first minor diameter tungsten rod (3) is 3-5mm, the thickness of the first zirconium-based metal glass layer (2) is 3-5mm, the number of turns of the first tungsten fiber layer (1) is 6-8, and the diameter of the tungsten fiber is 290-.

5. The composite long rod bullet with high penetration capability according to claim 4, wherein the number of turns of the first tungsten fiber layer (1) is 7, and the diameter of the tungsten fiber is 295-305 um.

6. The composite long rod bullet with high penetration capability according to claim 2, wherein said composite long rod bullet is a gradient long rod bullet, said minor diameter tungsten rod is a second minor diameter tungsten rod (6), said zirconium-based metallic glass layer is a second zirconium-based metallic glass layer (5), and said tungsten fiber layer is a second tungsten fiber layer (4); along the direction from the circle center of the second minor-diameter tungsten rod (6) to the outer edge, the diameter of the tungsten fiber in each circle of the second tungsten fiber layer (4) is gradually reduced; and in the same circle of the tungsten fiber layer, the diameters of the tungsten fibers are the same.

7. The composite long rod bullet with high penetration capability according to claim 6, wherein the diameter of the second minor diameter tungsten rod (6) is 3-5mm, the thickness of the second zirconium-based metal glass layer (5) is 3-5mm, the number of turns of the second tungsten fiber layer (4) is 6-8 turns, the diameter of the thickest tungsten fiber is 390-410um, and the diameter of the thinnest tungsten fiber is 140-160 um.

8. The composite long rod bullet with high penetration capability as claimed in claim 6, wherein the number of turns of the second tungsten fiber layer (4) is 7, and the diameters of the tungsten fibers in each turn of the second tungsten fiber layer (4) are 395-.

9. The composite long rod bullet with high penetration capability according to any one of claims 1 to 8, wherein the volume fraction of the total volume of the tungsten fibers in the composite long rod bullet is 75 to 85%, and the weight ratio of the minor diameter tungsten rod, the multiple turns of tungsten fiber layers and the zirconium-based metallic glass layers is 1: 2.38-2.44: 0.22-0.26.

10. The composite material long-rod bullet with high penetration capability according to any one of claims 1 to 8, wherein the length-diameter ratio of the composite material long-rod bullet is 8 to 12.

11. A method for preparing a composite material long rod bullet with high penetration capability according to any one of claims 1 to 10, wherein the method comprises:

1) arranging tungsten fibers outside the minor-diameter tungsten rod, and filling zirconium-based metal glass between the tungsten fibers and the minor-diameter tungsten rod;

2) and (3) sequentially carrying out vacuumizing, heating, pressurizing, pressure maintaining, heat preservation and cooling on the system.

12. The method according to claim 11, wherein the degree of vacuum of the evacuated system is 10 ^-3 —10 ^-4 Mpa；

The temperature rise comprises the steps of raising the temperature of the system from 290 ℃ to 295 ℃ to 800 ℃ to 1300 ℃;

the pressurizing comprises pressurizing the system to 0.5-0.9 MPa;

the pressure maintaining and heat preserving time is 5-15 min;

the cooling is furnace cooling.

13. The method as claimed in claim 12, wherein the step of raising the temperature comprises raising the temperature of the system from 290 ℃ to 295 ℃ to 1100 ℃ to 1150 ℃.

Images