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 bimetallic cavity-forming element in the form of a pipe with an outer layer of nickel and an inner layer of aluminium, a central cavity-forming element made of glass is placed coaxially. The gap between them is filled with a water filler. After sealing, the resulting assembly is placed coaxially inside the pipe-like bimetallic shell, the outer layer of which is made of aluminium and the inner one is made of nickel. In the gap between them a pipe-like intermediate deposit made of copper is placed coaxially. Explosion welding is carried out followed by annealing the welded shell.

EFFECT: for one act of explosive action with subsequent annealing of the welded workpiece, all-welded composite product with an inner cavity with an axial symmetry is obtained which has high heat resistance of its surfaces in oxidizing gas media and low thermal resistance of its multilayer wall during heat exchange of heated gases supplied to the internal cavity of the article, with the environment.

3 dwg, 1 tbl, 4 ex