Modeling and Implementation of Electrocontact Welding Deposition of Powders of Self-Fluxing Alloys

An analysis of the regularities of electrocontact welding deposition of powders of self-fluxing alloys has been made. A model and an implementation technology for this process have been developed. Results of metallographic investigations and tribotechnical tests of the obtained coatings have been given. The adequacy of the developed model has been shown when using it in calculations of the regimes of electrocontact welding deposition of powder materials. It has been established that the structures of the obtained coatings correspond to the structures of wear-resistant antifriction coatings produced from melts with an initial temperature no more than 50–100°C higher than the melting point of the material of powder particles. Crystallization of these melts under forging conditions ensures the formation of fine graininess in the materials of coatings obtained from them, with the grains having somewhat smeared boundaries within which the hereditary structure of the material of the original powder may be preserved.