Low-explosion-speed rock powder emulsion explosive

Abstract

The invention discloses low-explosion-speed rock powder emulsion explosive which is prepared by mixing the following components in parts by weight: 50-60 parts of rock powder emulsion explosive, 1.5-2 parts of a density adjusting agent and 40-50 parts of sodium chloride, wherein the density adjusting agent is prepared by mixing expanded glass beads and talcum powder. The explosion speed of the low-explosion-speed rock powder emulsion explosive disclosed by the invention can be stabilized to be 2100+ / -50m / s, the brisance of the explosive is 8-10mm, the gap distance of the explosive is 6-8cm, the natural bulk density of the explosive is 0.72-0.78g / cm<3>, the requirements of low explosion speed and low brisance in using the explosive in explosive welding are met, and the explosive is applicable to explosive welding of high-end out-phase metal plates.

Description

technical field [0001] The invention belongs to the technical field of industrial explosives, and relates to a low detonation velocity explosive for explosive welding, in particular to a low detonation velocity rock powder emulsion explosive. Background technique [0002] Explosive welding is to closely combine two metal plates of different materials (different phases) through the high temperature and high pressure generated during the explosion of explosives, so as to achieve the effect of metallurgical bonding. When the explosive explodes, the detonation wave propagates forward at a stable speed (that is, the detonation velocity), so that the doubler plate (special metal material) moves to the base plate (ordinary steel plate) in a very short time, and the plastic state changes through collision. The metal plates of the two dissimilar materials are thus bonded together. In explosive welding, the performance of explosives determines the quality of explosive welding, and th...

AI Technical Summary

Problems solved by technology

The detonation velocity and density value of the above low detonation velocity explosives have a large control range, which cannot meet the detonation velocity accuracy and density of explosives required for explosive welding of metal heterogeneous materials, and cannot be used for explosive welding of high-end metal materials.

[0005] Rock powder emulsion explosives have good fluidity, uniform natural bulk density, stable detonation velocity propagation, and moderate violence, but the detonation velocity is generally 3400-4000m / s, and the natural bulk density is generally 0.56-0.63g / cm 3 , the intensity is 13.5~15.5mm, which cannot meet the requirements of low detonation velocity explosives

If the rock powder emulsion explosive is directly used for explosive welding of heterogeneous metal materials, its high intensity and high detonation velocity will cause the metal materials to be broken and damaged, and the required effect cannot be achieved.