Methods for making and / or repairing an integrally bladed rotor

Methods for making and / or repairing an integrally bladed rotor, in particular an integrally bladed gas turbine rotor, comprising the steps of: a) providing a rotor base body; b) producing at least one rotor blade by powder-metallurgical injection molding, is mixed with at least one binder to form a homogeneous mass in the powder-metallurgical injection molding at least one metal powder, then at least one shaped body of a rotor blade is made from the homogeneous mass by injection molding, wherein the or each molded body subsequently is subjected to a binder removal process, and being compressed in connection by sintering the or each molded body to the blade with the desired geometric characteristics; c) joining the or each blade to the rotor base body by welding or brazing or diffusion bonding produced by powder injection molding engineering, characterized, that when mixing the homogeneous composition used for injection molding of the or each molded body to the or each metal powder and the or each binder as additives short fibers and / or particles are blended.