METHOD OF RESTORATION OF HEAT-RESISTANT THERMODIFFUSION ALUMINIDE COATINGS OF GAS TURBINE BLADES OF COMPLEX CONFIGURATION

摘要

FIELD: metallurgy. ^ SUBSTANCE: invention relates to restoration of heat-resistant thermodiffusion aluminide coatings on gas turbine blades of complex configuration. The method involves removal of the worn-out area of the used coating and applying coating on the remote area by slipping layer-by-layer using suspension. The suspension consists of inorganic phosphatic - chromate binding substance and fine-dispersed aluminium and silicon powders. This is followed by drying and heat fixing of each layer. The finished coating is then thermodiffusionally annealed in vacuum. ^ EFFECT: coatings on the worn-out blades are no different by their properties from the coatings applied on new blades and operational life of the blades is longer. ^ 5 cl, 3 dwg, 3 tbl