ONE-STEP SPRAYING COMPOSITE POWDER BEING CHARACTERIZED BY SELF-BOUNDING

The present paper has studied the self-bounding one-step spraying composite powder manufactured by bounding method. Spraying parameters and compositions were determined by the examination of bounding strength and hardness of coatings. Exothermic efficiency, metallographical structure and transition region of coating layer were also investigated. The properties of coatings. e. g. tensile strength, expansion coefficient, wear volume under given conditions and porosity, etc. were tested. Obvious economic advantages have been gained in the applications to some machine parts.