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 titanium and the inner one is made of niobium. In the gap between them a pipe-like intermediate deposit made of copper is placed coaxially and explosion welding is carried out followed by annealing the welded shell.

EFFECT: resulting all-welded composite product with an inner cavity with an axial symmetry has a high quality of welded joints, has high heat resistance of its inner surface in oxidizing gaseous media and corrosion resistance of its outer surface during heat exchange with the environment of heated gases supplied to the inner cavity of the product.

3 dwg, 1 tbl, 4 ex