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Special explosive for copper-A3 steel explosion welding and preparation method thereof

A technology of explosive welding and explosives, which is applied in the direction of explosives processing equipment, explosives, explosive composite components, etc., can solve problems such as corrosion and voids, and achieve the effect of simple processing and manufacturing, simple processing and manufacturing technology, and reduced purchase costs

Inactive Publication Date: 2016-04-13
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a special explosive for explosive welding of copper-A3 steel with adjustable detonation speed and low cost and its preparation method, so as to solve the quality problems of corrosion and voids that occur when explosive welding of metal materials is carried out with explosives

Method used

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Examples

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preparation example Construction

[0023] The present invention includes a special explosive and a preparation method of the special explosive;

[0024] Said special explosive: raw materials and their mass percentages include: 60-95% of 2# rock ammonium nitrate explosive; 2.5-20% of common salt; 2.5-20% of expanded perlite; said common salt is sodium salt;

[0025] The preparation method of the special explosive includes: drying and grinding process of raw materials, weighing and mixing process, and the specific method process is as follows:

[0026] a, drying and grinding process: the granular table salt and expanded perlite are naturally dried to make their moisture content less than 0.3%, and they are respectively ground to make their particle fineness the same as that of 2# rock ammonium nitrate explosive; Drying is air-drying or oven-drying;

[0027] b. Weighing ingredients and mixing process: Weigh ingredients according to the above raw material formula, then put the above three raw materials into a mixe...

Embodiment 1

[0029] Embodiment 1: raw material composition and mass percentage thereof are as follows: 2# rock ammonium nitrate explosive 70%; Salt 15%; Expanded perlite 15%;

[0030] The preparation method includes: drying, grinding process, weighing ingredients and mixing process, and the specific method process is as follows:

[0031] 1) The purchased table salt and expanded perlite often have relatively high moisture content, so they need to be air-dried in a natural environment or put into an oven for drying, so that the moisture content does not exceed 0.3%.

[0032] 2) Grinding process: Since the 2# rock ammonium nitrate explosive is easy to agglomerate, it needs to be put into a container to crush the agglomerates to make it into a powder, and ensure that more than 85% of the explosive can pass through the 24 hole.cm -1 Sieve cloth; the air-dried or dried table salt (sodium salt) and expanded perlite are subjected to grinding treatment after removing impurities, and the fineness o...

Embodiment 2

[0034] Embodiment 2: raw material composition and mass percent thereof are as follows: 2# rock ammonium nitrate explosive 70%; Salt 12.5%; Expanded perlite 12.5%;

[0035] The preparation method includes: drying, grinding process, weighing ingredients and mixing process, and the specific method process is as follows:

[0036] 1) The purchased table salt and expanded perlite often have relatively high moisture content, so they need to be air-dried in a natural environment or put into an oven for drying, so that the moisture content does not exceed 0.3%.

[0037] 2) Grinding process: Since the 2# rock ammonium nitrate explosive is easy to agglomerate, it needs to be put into a container to crush the agglomerates to make it into a powder, and ensure that more than 85% of the explosive can pass through the 24 hole.cm -1 Sieve cloth; the air-dried or dried table salt (sodium salt) and expanded perlite are subjected to grinding treatment after removing impurities, and the fineness ...

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Abstract

A special explosive for copper-A3 steel explosion welding and a preparation method thereof belong to special explosives and preparation methods thereof. A 2# rock ammonium nitrate explosive is taken as the main raw material and physically levigated together with sodium salt and expanded perlite to serve as the raw material for preparing the special explosive for copper-A3 steel explosion welding. In the preparation process of the special explosive, according to the weight ratio of the 2# rock ammonium nitrate explosive to sodium salt to expanded perlite of (95-60%): (2.5-20%): (2.5-20%), the 2# rock ammonium nitrate explosive, sodium salt and expanded perlite are mixed and fully stirred to obtain special explosives for copper-A3 steel explosion welding, which are of different explosion velocities. The prepared special explosive has the characteristics of being relatively low in explosion velocity, stable in detonation performance, moderate in energy, wide in material source, low in processing cost and the like. When the prepared special explosive is used for explosive welding of a copper-A3 steel plate, the wavy joint surfaces of the two materials are small in waveform change, compact in combination and stable in welding quality, the quality problems of corrosion, cavity and the like, caused when a high explosive is utilized for metal-material explosive welding are better solved, and the economic benefits are remarkably improved.

Description

technical field [0001] The invention relates to a special explosive and a preparation method, in particular to a special explosive for copper-A3 steel explosive welding and a preparation method. Background technique [0002] Explosive welding is a new technology that uses the huge energy generated by explosive explosion to plastically deform the interface of different metals to achieve metallurgical bonding. Under the impact of the explosive load, the joint surface of the metal composite plate usually has three joint forms: large wave, small wave and microwave. Among them, the microwave joint has the highest joint strength and the best quality, followed by the wavelet joint. , and the presence of microscopic defects such as voids and gaps in the large wavy joint surface leads to a decline in the joint quality of the composite plate. Experiments have shown that at the unsteady detonation point 50-60mm away from the detonation point, the best microwave-like bonding interface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/28C06B21/00
CPCC06B21/0008C06B31/28Y02P20/133
Inventor 田建胜柳志军
Owner CHINA UNIV OF MINING & TECH
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