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
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