EXPLOSION WELDING PROCEDURE FOR PRODUCTION OF ITEMS WITH INTERNAL CAVITIES Russian patent published in 2011 - IPC B23K20/08 B23K101/04 

FIELD: metallurgy.

SUBSTANCE: central cavity forming element removed after explosion welding is made of brittle material crushed at explosion. Ratio of thickness of its wall to thickness of walls of cavity forming elements adjacent to it is (4-10):1. Explosion welding is performed at specified rate of detonation of explosive substance and rate of collision of a tubular casing with cavity forming elements. As brittle material there is used glass. As corrosion-resistant metal with low heat conductivity for fabrication of a tubular casing there is used austenite stainless steel.

EFFECT: production of all-welded item with internal cavities with maintained axial symmetry and pressure tightness with reduced thermal resistance of metal layers; reduced heat exchange of substances present in internal channels of item with environment and high resistance to corrosive medium.

3 cl, 3 dwg, 1 tbl, 4 ex