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Low explosion speed high-toughness flake explosive and preparation method thereof

A technology with high toughness and low detonation velocity, which is applied in the direction of explosives, non-explosive/non-thermal agent components, non-explosive fillers/gelling agents/thickeners, etc. It can solve the problem of inability to form metal surfaces and the complex preparation process of flexible rubber explosives , Powdery explosives are difficult to use in large areas, etc., to achieve the effect of improving toughness, improving density uniformity, and avoiding excessive stress concentration

Inactive Publication Date: 2018-12-21
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used sheet explosives include powder explosives and flexible rubber explosives. However, powder explosives are difficult to use in a large area, and the preparation process of flexible rubber explosives is complicated, and it cannot be directly formed on the metal surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A low detonation velocity high toughness sheet explosive, its formula composition (weight parts) is: RDX: 52 parts, SiO 2 : 22 parts, HTPB: 12 ​​parts, DOS: 5 parts, CAB: 3 parts, MDI: 1.5 parts, BX: 4.1, TEA: 0.4 parts;

[0043] In RDX, particles with an average particle size of 15-25 μm account for 88%, and particles with a particle size of ≤0.01mm account for 12%;

[0044] SiO 2 The average particle size is 0.007mm;

[0045] The average particle size of CAB is 0.002mm;

[0046] Described low detonation velocity high tenacity sheet explosive mainly comprises the following steps:

[0047] Step A: Quantitatively weigh RDX and SiO according to the formula composition 2 , TEA, BX, DOS, first add TEA to BX and stir for 5 minutes, then add the solution to RDX and SiO 2 The material was stirred and mixed for 5 minutes, and then DOS was added to the mixed material and stirred and mixed for 5 minutes to obtain the mixed material A.

[0048] Step B: Quantitatively weigh H...

Embodiment 2

[0060] A kind of low detonation velocity high tenacity sheet explosive, its formula composition (weight parts) is: RDX: 53 parts, SiO 2 : 22 parts, HTPB: 13 parts, DOS: 4 parts, CAB: 3 parts, MDI: 1.5 parts, BX: 3.1, TEA: 0.4 parts;

[0061] In RDX, particles with an average particle size of 15-25 μm account for 90%, and particles with a particle size of ≤0.01mm account for 10%;

[0062] SiO 2 The average particle size is 0.008mm;

[0063] The average particle size of CAB is 0.002mm;

[0064] The preparation method is the same as in Example 1.

[0065] The various indexes of gained low detonation velocity high tenacity sheet explosive are as follows:

[0066] (1) Detonation velocity D = 5185m / s;

[0067] (2) Tensile strength: 4.8MPa, tensile strain: 3.8%;

[0068] (3) Compressive strength: 10.5MPa, compressive strain: 8.2%;

[0069] (4) Shore hardness: 72;

[0070] (5) The measured density of the medicine block ρ=1.58g / cm 3 ;

[0071] (6) The thickness of the tablet is...

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Abstract

The invention discloses a low explosion speed high-toughness flake explosive which consists of the following components in parts by weight: 50-55 parts of a single-compound explosive, 20-25 parts of aspeed reduction filler, 9-14 parts of an adhesive, 3-6 parts of a plasticizer, 2-4 parts of a toughening agent, 1-1.5 parts of a curing agent, 3-5 parts of a dispersant and 0.4-0.6 part of a couplingagent. The invention further discloses a method for preparing the low explosion speed high-toughness flake explosive. Due to adoption of silica as the speed reduction filler, the explosion speed of the formula can be reduced; due to adoption of CAB (Cellulose Acetate Butyrate) as the toughening agent, the toughness of the formula can be improved; due to a reasonable ratio of solid phases to liquid phases, the formula can be easily formed as flakes.

Description

technical field [0001] The invention relates to an explosive and a preparation method thereof, in particular to a low-velocity high-toughness sheet explosive and a preparation method thereof. Background technique [0002] Sheet explosives are commonly used in explosive hardening and explosive welding of metals and are usually thin and flexible. In metal explosive hardening, the role of sheet explosives is to generate high pressure on the metal surface to significantly increase the hardness of the surface. Materials such as railway frogs, tank tracks and cutting edges are often strengthened by explosive hardening. In explosive welding, the role of sheet explosives is to generate detonation energy to weld two or more metals together for special welding purposes. [0003] For explosive processing methods such as metal explosion hardening and explosive welding, the low detonation velocity sheet explosive can avoid the damage of the detonation wave to the metal foundation, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/34C06B23/00
CPCC06B23/00C06B23/001C06B25/34
Inventor 蔡贾林罗观黄明于海江
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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