Damage-repairing method of transition piece and transition piece

摘要

A damage-repairing method of a transition piece in an embodiment includes; an oxide removing step of removing an oxide on an outer surface 20b of an inner duct 20 of a transition piece 10 having damage; a repair material placing step of placing a brazing repair material 80 on the outer surface 20b of the inner duct 20 so as to cover the damage; and a diffusion brazing step of diffusion heat treating the inner duct 20 to repair the damage formed in the outer surface 20b. The damage-repairing method of the transition piece includes: a pressurized heat treating step of, under high pressure, heat treating the inner duct 20; a surface finishing step of scraping off the brazing repair material 80 projecting from the outer surface 20b; and a non-pressurized heat treating step of solution heat treating and aging heat treating the inner duct 20 under non-pressure.

主权项

1. A damage-repairing method of a transition piece, the method repairing a crack in the transition piece, the method comprising:
an oxide removing step of removing an oxide on an outer surface of the transition piece having the crack so as not to remove the crack; a repair material placing step of placing a brazing repair material on the outer surface, from which the oxide has been removed, of the transition piece so as to cover the crack; a fixing material placing step of covering the brazing repair material with a fixing material made of zirconia or silica, the brazing repair material being placed so as to cover the crack; a diffusion brazing step of diffusion heat treating the transition piece with the brazing repair material placed thereon and melting the brazing repair material to repair the crack formed in the outer surface; a pressurized heat treating step of, under high pressure, heat treating the transition piece of which the crack formed in the outer surface has been repaired; a surface finishing step of scraping off the brazing repair material projecting from the outer surface of the pressurized heat treated transition piece; and a non-pressurized heat treating step of, under non-pressure, solution heat treating and aging heat treating the surface finished transition piece.