DIFFUSION WELDING METHOD Russian patent published in 2002 - IPC

FIELD: manufacture of precision assemblies of different type materials by solid-phase welding. SUBSTANCE: method comprises steps of placing intermediate gasket between welded surfaces of joined parts; using gasket containing ultrafine highly active powder of metal and organic salt of that metal; at welding heating parts until temperature of beginning thermic decomposition of organic salt of metal, soaking parts at said temperature and welding pressure consisting 0.5 of its designed value for 5 min; then heating parts until temperature of ending thermic decomposition of metal organic salt while uniformly increasing welding pressure up to 0.8 of its designed value and soaking at such temperature and pressure for 5 min. It is possible to use mixture of several organic salts of metals not forming one with another intermetallide compounds. EFFECT: enhanced quality of welded joints due to lowered residual porosity of welded seams being fluid tight. 4 cl, 3 dwg, 1 ex