INFLUENCE OF ELECTROLYTIC PLASMA CEMENTATION ON THE MICROHARDNESS AND WEAR RESISTANCE OF STEEL 12Cr18Ni10Ti

摘要

The present work presents the results of electrolytic-plasma treatment influence on the mechanical properties and structural-phase condition of the surface layers of 12Cr18Ni10Ti steel. In the work, the mechanical characteristics of the surface layers that have been pack cemented by electrolytic plasma with the composition of 10% Na_2CO_3 and 10% C_3H_8O_3 are investigated. The operational parameters for the processing are determined. The optimal content of components in saturating mixtures of plasma by cementation is defined. Structural research of the samples was carried out by x-ray diffraction analysis, and optical and electron microscopy. The comparative study of the structure, phase and chemical composition of the modified surface layers of steel 12Cr18Ni10Ti is executed after electrolytic plasma processing. According to the study, after electrolyte plasma processing, high wear resistance and hardness increased by a factor of 2 to 2.5 more than in the original condition. A hardened layer with a thickness 200-250 μm is formed. It is shown that, after the electrolyte-plasma processing of steel 12Cr18Ni10Ti, the microstructure contains particles of carbides and has a fine-grained martensitic structure.