PROCESS FOR REPAIRING PARTS WITH OPEN SURFACE FLAWS Russian patent published in 2002 - IPC

FIELD: restoration of parts with open surface flaws. SUBSTANCE: process comprises steps of placing around flaw guard having inner contour in the form of ellipse described around flaw ( guard may have several rings secured one to another); drawing by thermal pencil outer contour of guard on part surface; removing guard and placing inside it exothermic mixture with binder, compacting and drying mixture until solidification; heating zone of flaw until temperature (200-500)C and determining temperature value according to change of color of trace of thermal pencil; again placing guard onto zone of flaw according to drawn contour; securing convex lid with opening to guard; igniting exothermic mixture through said opening and welding on flaw; removing guard and slag. EFFECT: enhanced quality of welded flaw, improved labor conditions. 3 cl, 2 dwg