Low detonation velocity powdery emulsion explosive for explosive welding

Abstract

The invention discloses a low detonation velocity powdery emulsion explosive for explosive welding, which is prepared by mixing the following components by weight percentage: 60-85% of powdery emulsion explosive and 15-40% of at least one of talcum powder and expanded perlite. Water content of the talcum powder is not greater than 0.5wt% and content of the talcum powder with fineness of 40 meshes is 70-85wt%. Water content of the expanded perlite is not greater than 0.5wt% and bulk density of the expanded perlite is 40-60kg / m<3>. Density of the low detonation velocity powdery emulsion explosive for explosive welding is 0.6-0.85g / cm<3>. The low detonation velocity powdery emulsion explosive for explosive welding has the advantages of easy production, stable performance, greater brisance and good explosive welding effect.

Description

technical field [0001] The invention relates to an emulsion explosive, in particular to a powdery emulsion explosive with a low detonation velocity for explosive welding. Background technique [0002] Explosive welding technology is a trinity metal welding process that uses explosives as the energy source of pressure welding, fusion welding and diffusion welding: using explosives as the energy source, through the pulse load generated by the explosive detonation, a material (multilayer) is pushed to a high-speed oblique collision Another material (base layer) realizes the metallurgical bonding of two metals by instantaneous high temperature and high pressure. The main purpose of the metal composite plate produced is to replace expensive stainless steel and non-ferrous metals for petrochemical, chemical, ship, vehicle, heat-resistant, wear-resistant and special equipment and components, so as to reduce the project cost. Due to the special requirements of welding technology, t...

AI Technical Summary

Problems solved by technology

Compared with the first type of explosive, this kind of explosive has the characteristics of stable quality and environmental protection, but has the disadvantages of low intensity and power, and the detonation performance is difficult to meet the requirements of explosive welding explosives.

Chinese patent CN1778777A discloses a low detonation velocity explosion welding explosive, which is made by mixing ammonium oil explosives and additives. This patent uses the wheel milling process that has been eliminated in the current civil explosive industry during processing, which cannot be implemented at present, and ammonium oil explosives The power is low, and the performance declines faster after adding inert substances, resulting in unstable performance, which cannot meet the violent requirements of explosive welding