Patent ID: 8033444

Claim:
A method for explosion welding, comprising: producing a grain comprising low detonation velocity explosives by combining explosive as a base, said base being mixed completely and evenly with a certain amount of powdered salt, wherein: the size of salt particles is between about 100 and 200 mesh, and the ratio of explosive versus salt is between about 3:1 and about 5:1 on a mass basis; providing an outer tube having an inside diameter; disposing an inner tube substantially concentrically inside said outer tube, said inner tube being sized in diameter to cause a spacing between said inner tube and said outer tube; placing said grain, inner tube and grain inside said inner tube; placing said outer tube into a mold prior to detonating said grain; inhibiting the negative influence on welding quality caused by a gap between said outer tube and said mold by adding a layer of copper between the outer wall of said outer tube and an inner wall of said mold; and detonating said grain.