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. After explosion welding stack of produced three-layers stacks are composed with aluminium and copper-nickel plates arranged there between with preset thickness of layers and anti-welding composition applied thereto. After forming of inner cavities between copper layers, seven-layer workpiece is annealed to produce intermetallide diffusion layers between those of aluminium and nickel. Workpiece is heated to temperature exceeding aluminium melding point to remove aluminium from its surface and cured at said temperature.

EFFECT: high heat resistance and durability in oxidising gases.

5 dwg, 1 tbl, 3 ex