METHOD OF PRODUCING COMPOSITE PRODUCTS WITH INNER CAVITY BY MEANS OF EXPLOSION WELDING Russian patent published in 2017 - IPC B23K20/08 B23K101/04 B32B15/00 

FIELD: technological processes.

SUBSTANCE: inside the cavity-forming element in the form of a titanium tube with a wall thickness of 3-4 mm, a central cavity-forming element of glass with a wall thickness of 10-15 mm is placed coaxially. The gap between them is filled with a water filler. After sealing the resulting assembly, it is placed coaxially inside the tubular sheath with a wall thickness of 3-4 mm. In the gap between them, a tubular bimetallic interlayer with an outer copper layer of 1-1.2 mm and an inner layer of niobium with a thickness of 0.8-1 mm is placed coaxially. Explosion welding is carried out on regulated modes. For one act of explosive impact an all-welded composite product of cylindrical shape with an internal cavity without axial symmetry violation and tightness of the metal layers is produced.

EFFECT: product has a low hydraulic resistance of the internal cavity per unit length of the product when the heat transfer medium passes through it and high thermal resistance of its four-layer wall during heat exchange of substances in its internal cavity with the environment.

3 dwg, 1 tbl, 3 ex