METHOD OF PRODUCING COMPOSITE ARTICLES WITH INNER CAVITIES BY EXPLOSION WELDING Russian patent published in 2011 - IPC B23K20/08 B23K101/04 

FIELD: process engineering.

SUBSTANCE: invention may be used for production of articles with inner cavities, for examples, heat exchangers, chemical equipment etc. Thickness of article wall is selected related to that of adjacent pipe bundle walls. Tubular shell is made from antirust lower heat conductivity metal, for example titanium. Tubular interlayer from lower heat conductivity metal, for example, austenite steel is arranged between tubular shell and pipe bundle. Explosion welding is carried out at preset explosive detonation rate, rate of collision between shell and interlayer and that between tubular shell and cavity-forming elements.

EFFECT: all-welded article with inner cavities with reduced thermal resistance, higher antirust properties in aggressive media.

4 cl, 3 dwg, 1 tbl, 4 ex