EXPLOSION WELDING PROCEDURE FOR PRODUCTION OF COMPOSITE ITEMS WITH INTERNAL CAVITIES Russian patent published in 2015 - IPC B23K20/08 B23K103/18 

FIELD: metallurgy.

SUBSTANCE: method includes preparation of two three-layer packs with inclusion in each pack the copper plate between titanium plates with ration of plates thicknesses titanium-copper-titanium 1:(0.75-1.0):1 at the titanium plate thickness equal to 1.0-1.2 mm. Between the packs symmetrically with welding gaps the central copper plate is arranged, it contains cylindrical internal cavities filled with the low-melting metal removed after explosion welding, for example lead. On surfaces of the titanium plates the explosive charges are located, and welding by the explosion of the obtained assembly is performed, then low-melting metal is removed from the internal cavities, and welded blank is annealed to create solid diffusion intermetallic layers between the titanium and copper at temperature exceeding temperature of contact melting of the copper and titanium.

EFFECT: production of composite items with increased strength at bending loads, with external layers not prone to brittle fracture under contact loads.

2 cl, 4 dwg, 1 tbl