MAKING OF WELD AT WELDING OR SURFACING OF PARTS FROM DIFFICULT-TO-WELD METALS AND ALLOYS Russian patent published in 2014 - IPC B23K33/00 

FIELD: process engineering.

SUBSTANCE: invention can be used for welding or surfacing of parts from difficult-to-weld metals and alloys. Weld sections are sequentially made by step-by-step reciprocation of electrode or welding head. Length of the weld first section makes 40-60% of welding step. Electrode or welding head is turned to weld first section welding start to weld second section in length equal to said step. Note here that said first part is made at rerun over weld previous section while second section is made at article surface to produce a transition part. Then, electrode or welding head is returned for spacing equal to the weld previous section second part length. Next section is produced in length equal to welding step by rerun over second part of weld previous section and over article surface. Welding or surfacing is reiterated required number of times unless weld of preset length is produced. Last section of the weld of residual length is made by rerun over previous section second part.

EFFECT: decreased area of thermal effects, higher welding efficiency.

5 dwg, 5 ex