METHOD FOR OBTAINING COMPOSITE ITEMS WITH INTERNAL CAVITIES BY EXPLOSION WELDING Russian patent published in 2015 - IPC B23K20/08 B23K31/02 

FIELD: power industry.

SUBSTANCE: three-layered pack is composed with arrangement between plates from titanium of a copper plate with thickness ratio of titanium-copper-titanium layers of 1:(0.75-1.0):1 at titanium layer thickness equal to 1-1.2 mm. Titanium layer is installed with a welding gap above the lower copper plate. With that, the copper plate is provided with internal cylindrical cavities filled with low-melting metal removed after explosion welding. An explosive charge is located on the surface of the upper titanium plate, and explosion welding of the obtained assembly is performed. Low-melting metal is removed from internal cavities and annealing of the welded workpiece is performed for formation of solid diffusion intermetallic interlayers between titanium and copper at the temperature exceeding the temperature of contact melting of copper and titanium.

EFFECT: creation of a new technological cycle for fabrication of composite items with internal cavities by explosion welding.

2 cl, 1 tbl, 4 dwg