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CN-122015574-A - High-low strength combined material-increasing heterogeneous cavity jet-flow-resistant armor protection structure

CN122015574ACN 122015574 ACN122015574 ACN 122015574ACN-122015574-A

Abstract

The invention discloses a high-low strength combined material-increasing heterogeneous cavity anti-jet armor protection structure, which relates to the technical field of armor protection, and comprises a substrate, wherein the substrate is provided with a plurality of heterogeneous cavity areas which are arrayed, each heterogeneous cavity area is composed of heterogeneous layers and cavity layers, the heterogeneous layers and the cavity layers are alternately arrayed and obliquely designed, the cavity layers in adjacent heterogeneous cavity areas are in mirror symmetry, the heterogeneous layers comprise a plurality of high-strength steel materials and a plurality of low-strength steel materials, the high-strength steel materials and the low-strength steel materials are alternately distributed along the wall surface of the cavity layer, an included angle alpha between the wall surface of the cavity layer and a vertical surface is 60-70 degrees, an included angle beta between a heterogeneous interface between the high-strength steel materials and the low-strength steel materials in the heterogeneous layers and the vertical surface is 45-60 degrees, and the armor protection structure is integrally formed through an electric arc material-increasing manufacturing technology. The invention realizes the unification of light weight and high penetration resistance, and has important engineering application value.

Inventors

  • ZHANG JUNZHONG
  • WANG ZIHAO
  • ZHANG YONGLIANG
  • ZHENG HANG
  • WANG KEHONG
  • ZHOU QI
  • ZHENG ZHIJUN

Assignees

  • 中国科学技术大学
  • 南京理工大学

Dates

Publication Date
20260512
Application Date
20260226

Claims (10)

  1. 1. The high-low strength combined material-increasing heterogeneous cavity anti-jet armor protection structure comprises a substrate, and is characterized in that the substrate is provided with a plurality of heterogeneous cavity areas which are arrayed, each heterogeneous cavity area is composed of heterogeneous layers and cavity layers (3), and the heterogeneous layers and the cavity layers (3) are alternately arrayed and obliquely designed; The heterogeneous layer comprises a plurality of high-strength steel products (1) and a plurality of low-strength steel products (2), the volume ratio of the low-strength steel products (2) to the high-strength steel products (1) is 1-3, the high-strength steel products (1) and the low-strength steel products (2) are alternately distributed along the wall surface of the cavity layer (3), the included angle alpha between the wall surface of the cavity layer (3) and the vertical surface is 60-70 degrees, and the included angle beta between the heterogeneous interface between the high-strength steel products (1) and the low-strength steel products (2) in the heterogeneous layer and the vertical surface is 45-60 degrees; the armor protective structure is integrally formed by an arc additive manufacturing technique.
  2. 2. The high and low strength combined additive heterogeneous cavity anti-jet armor protective structure according to claim 1, wherein the substrate is made of high strength steel (1).
  3. 3. The high and low strength combined additive heterogeneous cavity anti-jet armor protective structure according to claim 2, wherein the heterogeneous cavity areas are rectangular, a plurality of rectangular heterogeneous cavity areas are arranged in a grid, and a matrix part smaller than 5mm is arranged between the left heterogeneous cavity area and the right heterogeneous cavity area.
  4. 4. The high-low strength combined additive heterogeneous cavity anti-jet armor protection structure according to claim 3, wherein heterogeneous layers and cavity layers (3) in the heterogeneous cavity area are arranged in a diagonal manner, the heterogeneous layers are in uniform strips, the width of the heterogeneous layers is 3 mm-6 mm, and low-strength steel (2) and high-strength steel (1) in the heterogeneous layers are arranged in an equal-volume alternating manner.
  5. 5. The high-low strength combined additive heterogeneous cavity anti-jet armor protection structure according to claim 4, wherein the cavity layer (3) is a gap part between adjacent heterogeneous layers in the heterogeneous cavity area, and the parallel width of the cavity layer (3) is 3 mm-5 mm.
  6. 6. The high and low strength combined additive heterogeneous cavity anti-jet armor protective structure according to claim 2, wherein the high strength steel material (1) is a high strength steel substrate with a yield strength greater than 1000 MPa.
  7. 7. The high-low strength combined additive heterogeneous cavity anti-jet armor protection structure according to claim 6, wherein the high-strength steel (1) is selected from MS1 die steel, IN718 nickel-based superalloy or ER130S-G high-strength steel substrate.
  8. 8. The high-low strength combined additive heterogeneous cavity anti-jet armor protection structure according to claim 2, wherein the low-strength steel (2) is a low-strength steel substrate with the yield strength of 450-500 MPa.
  9. 9. The high-low strength combined additive heterogeneous cavity anti-jet armor protection structure according to claim 8, wherein the low-strength steel (2) is selected from 17-4PH stainless steel, 15-5PH stainless steel or 316L stainless steel base material.
  10. 10. The high and low strength combined additive heterogeneous cavity anti-jet armor protective structure according to any one of claims 2-9, wherein the arc additive manufacturing technique is specifically as follows: adopting arc material adding equipment with a double wire feeding system, alternately feeding high-strength steel and low-strength steel wires according to program instructions, and cladding layer by using a pulse arc technology; When the steel wire is deposited on the cavity layer (3), the cavity layer (3) with a set inclination angle is directly formed without support by controlling wire feeding start and stop and a deposition path, and the high-strength steel wire and the low-strength steel wire are ensured to be alternately distributed along the wall surface of the cavity layer (3), and a set included angle beta is kept at a heterogeneous interface; after each layer of cavity deposition is completed, the deposition direction is adjusted to enable the cavity layers (3) of adjacent heterogeneous cavity areas to be in mirror symmetry.

Description

High-low strength combined material-increasing heterogeneous cavity jet-flow-resistant armor protection structure Technical Field The invention belongs to the technical field of armor protection, and particularly relates to a high-low strength combined material-increasing heterogeneous cavity jet-flow-resistant armor protection structure. Background The protection principle of the energy-gathering jet flow comprises interference, fracture, bending, repeated pit opening energy consumption, reactive armor flyer cutting interference and the like, and the jet flow is interfered while energy is absorbed by plastic deformation of a protection structure material or the modes of generating fragments, crack expansion and the like. In existing armor structures, it is most common to introduce blast reactive armor that is either interstitial, metal-to-nonmetal (rubber, ceramic, etc.) composite, or metal-to-energetic material composite. As shown in the conch shell bionic structure aluminum-based composite armor and the forming method thereof disclosed in the patent with the publication number of CN116275053B, crack deflection is induced under the impact load effect by the design of alternately distributed high-strength layers and high-toughness layers, so that the energy absorption rate and the impact resistance are improved. However, whether or not a gradient design is introduced, the macrostructure is still in the form of a stack in nature, relying primarily on the differences in properties of the material itself to resist impact. In addition, the verification environment of the structure is Hopkinson rod impact test, the effectiveness of the structure is mainly aimed at a low-speed impact scene, and the practical application of armor probably faces the threat of ultra-high-speed energy-gathering jet flow (the speed can reach 8-10 km/s), so that the structural design of the armor needs to be optimized aiming at the high-speed impact environment. The invention application with publication number of CN107687791A discloses an energy-gathering type explosion reaction armor structure capable of preventing long rod armor piercing bullet. The structure is different from the traditional sandwich type flat plate configuration, and has the innovation point that the fly plate is used for forming the shaped charge configuration, and the elastic body is induced to be unstable through the lateral action of the energy-gathering jet flow and the armor-piercing elastic body. However, such structures have significant limitations, firstly, in that the high energy released by the explosive reactive armor itself constitutes a serious safety hazard to the armor body and surrounding environment, and secondly, in that the structure, if deployed as an externally hung additional armor, would result in a significant increase in system size and weight, yet attempts to embed it inside the main armor are difficult to achieve, as the high velocity jet formed by the shaped charge may cause collateral damage to adjacent components. With the development of advanced forming technologies such as additive manufacturing (Additive Manufacturing, AM), it has become possible to realize integrated forming of heterogeneous and heterogeneous materials. Against this background, the relatively simple laminate design does not fully exploit the potential advantages of current forming techniques. Additive manufacturing, which is an advanced metal processing technology, has been applied in the fields of military, aerospace, civil engineering, etc. by virtue of its unique advantages in complex geometry manufacturing and multi-material integrated design. Therefore, based on the synergistic design of material heterogeneity and structural isomerism realized by additive manufacturing, the invention provides a lightweight high-protection structure with heterogeneous cavities, and aims to remarkably improve the penetration resistance of energy accumulating jet flow of armor. The structure aims to realize the effects of disturbing jet flow and dispersing energy consumption through the synergistic effect of the strength heterogeneity design of the metal matrix material, the built-in cavity configuration and the interface inclination angle. Disclosure of Invention The invention aims to provide an additive heterogeneous cavity anti-jet armor protection structure with a high-low strength combination, which solves the problems that the existing armor structure proposed in the background art cannot be provided with high protection performance and light weight at the same time, is not suitable for high-speed/ultra-high-speed impact environments and the like. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention provides a high-low strength combined additive heterogeneous cavity anti-jet armor protection structure, which comprises a matrix, wherein the matrix is provided with a plurality of heterogeneous cavity areas arranged in an