Low-detonation-velocity explosive for explosive welding and preparation method thereof

Abstract

The invention relates to a low-detonation-velocity explosive for explosive welding and a preparation technique thereof. The low-detonation-velocity explosive for explosive welding is mainly prepared from 60-83 wt% of third-grade coal mine allowable powder emulsion explosive, 10-25 wt% of talcum powder, 5-10 wt% of silicon aluminum powder and 3-5 wt% of wheat straw powder. The preparation technique comprises the following steps: respectively weighing the following raw materials in percentage by mass: third-grade coal mine allowable powder emulsion explosive, talcum powder, silicon aluminum powder and wheat straw powder; and drying the talcum powder, silicon aluminum powder and wheat straw powder at 80-95 DEG C until the water content is not higher than 0.5 wt%, uniformly mixing, adding the wheat straw powder to obtain the low-detonation-velocity explosive for explosive welding, and packaging for later use. The low-detonation-velocity explosive for explosive welding is easy to produce, and has the advantage of stable performance. The low-detonation-velocity explosive for explosive welding satisfies the requirement that the explosive welding explosive brisance is 9-11mm, the detonation velocity is 2500-2750 m / s, thereby ensuring the explosive welding effect.

Description

technical field [0001] The invention belongs to the technical field of industrial explosives, and in particular relates to a low-detonation-velocity explosive used for explosive welding and a preparation method thereof. Background technique [0002] Explosive welding technology uses explosives as the energy source, and through the detonation effect of explosives, the cladding material collides with the base material at high speed to realize the metallurgical bonding of the two metals, and the bonding area presents a wavy metallurgical bonding. [0003] Explosion welding is commonly used for welding between dissimilar metals. Explosive welding uses the energy of explosives to weld two or more metal materials together to form a composite material by achieving high-speed oblique collision under the action of detonation waves. explosive welding [0004] The metal composite plate obtained by the method can replace expensive stainless steel and non-ferrous precious metals, and i...

AI Technical Summary

Problems solved by technology

[0006] At present, the low detonation velocity explosives used in the market are roughly divided into two types: one is a single substance high explosive plus a diluent, and the high explosives used are TNT and RDX, etc. Military explosives, these explosives are high in cost, high in mechanical sensitivity, and highly dangerous in the production process. At the same time, the explosives produce a large amount of harmful exhaust gas during the explosion process, polluting the environment; one is the expanded ammonium nitrate explosive or modified ammonium oil explosive Add diluents, such as perlite, hollow glass microspheres, wood powder and other particles, to reduce the detonation velocity, but there are disadvantages of low intensity and power, and the detonation performance is difficult to meet the requirements of explosive welding.