TECHNOLOGICAL ASPECTS OF THE FORMATION OF POWDER METAL LAYERS WITH A GIVEN GRADIENT OF PROPERTIES BY THE ELECTROTHERMAL METHOD

The theoretical conditions and principles for the formation of coating s from metal powders stratified in chemical and phase composition usin g a combination of methods are developed. Wear resistant inclusions of defined size and concentration are placed in a diffusionally alloyed or eutectically melted matrix. Composite coatings for operation under stationary friction conditions with a required gradient of structure a nd properties are formed by the thermochemical treatment (diffusional alloying or eutectic melting) of matrix-filler electrolytic deposits. The optimal classes of graded coatings are defined on the basis of mod eling the stress stare of the coatings.