METHOD OF EXPLOSIVE WELDING

摘要

The practical usefulness of impact welding of metals is limited by difficulties associated with applying an intense pulse of energy, to accelerate and impact one body against another at velocities of about 300m/s colliding at an oblique angle averaging 8°. This invention employs a chemical agent to treat surfaces to be welded with a chemical agent that, during the welding cycle, releases chemical elements that scavenge oxygen and diffuse into treated surfaces and which lowers the velocity to weld to typically below 150m/s (and therefore lowers the energy to weld); the reduced velocity to weld reduces jet cleaning efficiency, which is offset by aligning the micro roughness on the two surfaces with the direction of travel of the weld front. The process is useful for first - reducing overall energy to weld, and second - reducing local energy to weld where welding energy is marginal, at for example the start/finish split of an induction coil in electro magnetic impulse propulsion.