Metal fiber toughened and enhanced TNT (trinitrotoluene)-based melt-cast explosive and preparation method thereof

A technology of metal fiber and melting and casting explosives, which is applied in the directions of explosives, nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, nitroglycerin compositions, etc. Processing steps and other issues to achieve the effect of enhancing strength and toughness, good material rheology, and conducive to casting

Active Publication Date: 2014-02-19
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(2) Changing the production process, cooling method, vacuum degree, charge density, and charge defects will greatly affect the mechanical properties such as compressive fracture strength, yield strength, and Young's modulus of the product; this requires the transformation of the existing production line Even completely updated and replaced, the infrastructure investment is relatively large
(3) Add polymer additives (polyurethane elastomer, polysulfone, etc.), such as coating RDX with polysulfone can improve the toughness of B explosive, and coating RDX with aromatic copolymer can reduce the oil leakage rate and size of B explosive The growth rate and the strength are increased by more than two times. This method has a good mechanical modification effect, but it increases the coating treatment steps of explosive raw materials, and it also needs to build corresponding equipment.

Method used

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  • Metal fiber toughened and enhanced TNT (trinitrotoluene)-based melt-cast explosive and preparation method thereof
  • Metal fiber toughened and enhanced TNT (trinitrotoluene)-based melt-cast explosive and preparation method thereof
  • Metal fiber toughened and enhanced TNT (trinitrotoluene)-based melt-cast explosive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Aluminum fiber toughened and reinforced TNT-based fused-cast explosive and its preparation method

[0023] The formula composition (percentage by weight) of aluminum fiber toughening reinforced TNT-based fused-cast explosive is as follows:

[0024] TNT, 35%;

[0025] RDX, 62.5%; RDX coarse and fine particles comply with GJB296A-1995 Class 3 and Class 5 particle size standards, of which 22.5% are coarse and 40% are fine;

[0026] Aluminum fiber, 1.0%; the length of the aluminum fiber is 3 mm, and the diameter is 70 μm;

[0027] Paraffin, 1.5%.

[0028] The preparation method of TNT-based melting and casting explosive is as follows:

[0029] Step 1: Aluminum fiber pretreatment: put the aluminum fiber in an ethanol solution with a mass fraction of 2% sodium dodecylbenzenesulfonate, stir for 30 minutes at a speed of 200-500 rpm, ultrasonically disperse for 10 minutes with an ultrasonic oscillator, filter and dry .

[0030] Step 2: Ingredients: Weigh the comp...

Embodiment 2

[0036] Embodiment 2: Stainless steel fiber toughened and reinforced TNT-based fused-cast explosives

[0037] The formula composition (percentage by weight) of stainless steel fiber toughened and strengthened TNT-based melt-cast explosive is as follows:

[0038] TNT, 35%;

[0039] RDX, 62.5%; RDX coarse and fine particles comply with GJB296A-1995 Class 3 and Class 5 particle size standards, of which 32.5% are coarse and 30% are fine;

[0040] Stainless steel fiber, 1.0%; the diameter of stainless steel fiber is 15μm, and the length is 6mm;

[0041] Paraffin, 1.5%;

[0042] The preparation method of the stainless steel fiber toughened and reinforced TNT-based fused-cast explosive in Example 2 is the same as that in Example 1.

[0043] The properties of the prepared stainless steel fiber toughened and reinforced TNT-based fused-cast explosives are shown in Table 2.

[0044] Table 2: Properties of TNT-based fused-cast explosives reinforced by stainless steel fibers

[0045] ...

Embodiment 3

[0046] Embodiment 3: Copper fiber toughened and reinforced TNT-based fused-cast explosives

[0047] The formula composition (percentage by weight) of copper fiber toughening reinforced TNT-based fused-cast explosive is as follows:

[0048] TNT, 32.5%;

[0049] HMX, 65%; the coarse and fine particles of HMX meet the 3rd and 5th standards of GJB2335-1995 respectively, of which 40% are coarse particles and 25% are fine particles;

[0050] Copper fiber, 1.0%; the diameter of the copper fiber is 30μm, and the length is 3mm;

[0051] Paraffin, 1.5%;

[0052] The preparation method of copper fiber toughened and reinforced TNT-based fused-cast explosive in Example 3 is the same as that in Example 1.

[0053] The properties of the prepared copper fiber toughened and reinforced TNT-based fused-cast explosives are shown in Table 3.

[0054] Table 3: Properties of TNT-based fused-cast explosives reinforced by copper fiber toughening

[0055]

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Abstract

The invention discloses metal fiber toughened and enhanced TNT (trinitrotoluene)-based melt-cast explosive and a preparation method thereof. The melt-cast explosive comprises components in parts by weight as follows: 30-40 parts of TNT, 60-70 parts of hexogen or octogen, 0-3 parts of metal fiber and 0-2 parts of paraffin. The preparation method comprises the steps as follows: a surfactant solution is used for treating the metal fiber; materials are compounded; the materials are placed in an explosive melting machine for mixing; and casting is performed under atmospheric pressure. The TNT-based melt-cast explosive has the mechanical properties as follows: the compressive strength is larger than or equal to 24 MPa, the compressive strain is larger than or equal to 0.33%, the compressive modulus of elasticity is larger than or equal to 9 GPa, lower mechanical sensitivity is provided, the friction sensitivity is 0%-10%, and the impact sensitivity is 20%-40%.

Description

technical field [0001] The invention belongs to the field of energetic materials for military use, and in particular relates to a metal fiber toughened and reinforced TNT-based fused-cast explosive and a preparation method thereof, which can be used in conventional weapons such as bombs, artillery shells, missiles, torpedoes, etc. It has broad application prospects. Background technique [0002] Since the end of the 19th century, cast explosives have been widely loaded with grenade, anti-tank, armor-piercing bombs, landmines, rockets, missiles and other ammunition. Especially after World War II, cast explosives with TNT as the carrier accounted for more than 90% of military mixed explosives. Melting and casting explosives have the advantages of low cost, good molding performance, and high degree of charge automation. However, with the requirements of modern weapons for high energy characteristics, high damage effects, high safety and long-term storage performance of charges,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/34C06B25/12C06B33/08
Inventor 罗观郑保辉王平胜舒远杰黄勇蔡忠展
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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