A NEW METHOD FOR INCREASING THE QUALITY OF COATINGS WHEN RESTORING PARTS BY THE METHOD OF ELECTROEROSION ALLOYING

Abstract

This work describes a new method for restoring worn surfaces of parts made of stainless steel 12X18H10T by electroerosive alloying (EEA), electrodes made of hard alloy T15K6 and the same steel 12X18H10T. In this case, the coating is applied in two stages, and at the first stage, a layer is applied using the modes that provide the greatest surface thickness at the greatest continuity, then a coating layer is applied to the resulting surface with the same electrode and EEA method with such a discharge energy and its corresponding productivity, at which form a surface with a roughness of approximately 2-4 times higher than in the previous step. As a result, at a relatively acceptable thickness of the reconstructed layer, the most rational roughness value is formed and the surface continuity increases to 100%.  A reserve for increasing the thickness of the restored layer can be a combined technology, including EEA and the subsequent deposition of metal-polymer materials. In this case, individual technologies do not in any way reduce the dignity of each other, but supplement them and eliminate the disadvantages inherent in each technology individually.  The results of the research can be applied in repair technologies when restoring seats for rolling bearings, pulleys, protective sleeves and impellers of rotors, coupling halves and other parts.