Patent ID: 6626350
Filing Date: 2003-09-30
Classification: B23K,B23P,C23C,Y10T

Abstract:
Method of repairing metallic components, particularly for gas turbines, having mechanically weight-carrying grooves, whose longitudinal edges existing on the component surface are situated at least largely in a plane, and whose actual contour deviates at least locally after the removal and/or displacement of the component material from the desired contour, by the application of an at least predominantly metallic additional material to the actual groove contour as well as by machining to the desired contour, for each groove, said method comprising the following sequential steps:mechanical abrasive blasting of the groove surfaces by means of a non-oxidic abrasive, closing of open groove ends by a buildup welding of a welding material with the same base as the component material, filling the groove closed on the end side with a soldering powder which has the same base as the material of the component but melts at a lower temperature, without or with at least one of a wear-reducing material or filling additional material, the empty-volume fraction of the soldering powder without or with the additional material being compensated by its accumulation beyond the groove surface, heating the soldering powder in the vacuum to the liquefaction and metallic joining with the component material, the groove being held in a horizontal position opened toward the top, as well as cooling and solidifying in the vacuum, and machining to the desired contour by an extensive removal of the solidified solder.