METHOD OF PRODUCING COMPOSITE ARTICLES WITH INNER CAVITIES BY EXPLOSION WELDING Russian patent published in 2013 - IPC B23K20/08 B23K101/14 

FIELD: process engineering.

SUBSTANCE: invention may be used for making articles with inner cavities by explosion welding. Two three-layers stacks are composed with aluminium and copper-nickel plates arranged there between with preset thickness of layers to be welded by explosion. Anti-welding substance is applied to bottom copper layer surface. Hydraulic pressure is used to form inner cavities between copper layers of welded six-layer workpiece to be sintered to obtain intermetallide diffusion interlayers between aluminium and nickel layers. Now workpiece is heated to aluminium melting point to remove fused aluminium from its surface and cured at said point to transform aluminium residues in intermetallides.

EFFECT: continuous heat-resistant 50-70 mcm-thick intermetallide layer to resist high temperature in oxidising gases.

5 dwg, 1 tbl, 3 ex