METHOD FOR MAKING BY EXPLOSION WELDING ARTICLES WITH INNER DUCTS Russian patent published in 2003 - IPC

FIELD: manufacture of filtering members, heat exchangers, sliding bearings and so on. SUBSTANCE: method comprises steps of placing void-forming material in the form of polymeric fibers in tubular cover while orienting fibers along axial duct of tubular cover; arranging steel cone deflector with apex angle in range 60 - 90 degrees in upper part of tubular cover; filling tubular cover with pressed powder; placing prepared assembly in inner cavity of cylinder of highly ductile metal and arranging protective tubular sublayer; after arranging separation gasket realizing welding by means of impact loading due to speeding up cylindrical striker with use of solid-fuel throwing device whose barrel is arranged coaxially relative to made blank and its collision with separation gasket at rate 550 - 650 m/s at relation of its mass to mass of cylinder of highly ductile metal equal to 0.2 - 0.24. Pressing method during which lengthwise front of shock wave is converted to cross front provides high density of powder matrix. EFFECT: possibility for providing normalized penetrability of inner ducts of article. 2 cl, 2 dwg, 1 tbl, 3 ex