Technological parameters of fine tube-sheet joints brazed by scanning electron beam heat

The present paper proposes the vacuum scanning EB brazing (SEBB) technology. Investigation on SEBB processing features of stainless steel tube-sheet structure was performed, the effect of SEBB technological factors (EB current, heating time, scanning area, EB current rising slope, filler metal mass preset, joint fit-up gap) on the brazed joints quality was analyzed, and the resulting optimal parameters array is presented in the paper.