Explosion welding explosive with low explosion velocity

Abstract

The invention discloses an explosion welding explosive with a low explosion velocity for explosion welding between metal sheet materials and preparation method thereof. The explosion welding explosive consists of 66 to 76 portions of ammonium nitrate, 3 to 5 portions of composite oil phase and 21 to 29 portions of doped powder, wherein the composite oil phase consists of 2.6 to 4.8 portions of solid wax and 0.2 to 0.4 portion of stearic amine salt; and the doped powder consists of 15.95 to 23.2 portions of ferric oxide powder and 5.04 to 8.9 portions of diatomite powder. The preparation method comprises the following steps: adding water with 8 to 12 mass percent of the ammonium nitrate into the ammonium nitrate; heating and dissolving the mixture to obtain aqueous solution of ammonium nitrate; under low-speed stirring, dispersing the composite oil phase and the doped powder respectively into the aqueous solution of the ammonium nitrate; mixing and heating the mixed solution till a temperature of between 105 and 125 DEG C to obtain suspended mixed solution; removing moisture in a vacuum tank with vacuum degree of between 0.07 below zero and 0.09 MPa below zero; and cooling, sievingand filling the explosive to obtain the explosion welding explosive with the low explosion velocity of less than 2,400 m / s. Explosive particles have good dispersion and are convenient to distribute;and the explosive has low explosion velocity and stable explosion performance and can meet the requirement of the explosive for the explosion welding of different metal materials.

Description

technical field

[0001] The invention relates to an explosive, in particular to a low-velocity explosive welding explosive used for explosive welding between metal plates and a preparation method thereof. Background technique

[0002] Explosive welding is to use the energy generated by the explosion of explosives to make the doubler plate tilt and collide with the substrate at a very high speed, so that local severe plastic deformation occurs between the two metal plate interfaces and they are tightly combined to form a good welding interface. This technology has been widely used in national defense, shipbuilding, petrochemical, metallurgy and other departments. As the energy source of explosive welding, the quality of explosives will directly affect the quality of explosive welding. Since the necessary condition for realizing explosive welding is ρ H C H <ρ 1 C 1 <ρ 2 C 2 (ρ H , ρ 1 , ρ 2 are the densities of detonation product C-J surface, doubler material an...