Phase Composition and Microhardness of Surface Layers 34CrNi1Mo Steel after Electrolytic-Plasma Processing

Abstract

Present work is devoted to phase composition research, structure and microhardness of structural steel 34CrNi1Mo after electrolytic-plasma processing in a cathode heating mode. Technology of electrolyte-plasma hardening provides reliable quality and the required mechanical properties of the products which are often subjected to wear and temperature-force actions. Results of microscopic researches and X-ray structure analysis are presented in this work. It is established that microstructure of steel detail modified layer being processed in electrolytic plasma at a temperature of 850 °C during 5 minutes, is generally represented by martensite quenching. The phase composition of steel 34CrNi1Mo after electrolytic-plasma carburization is presented by structure of α-Fе phase and carbide phases Fe2C, Fe3C. Surface microhardness increases more than by 2.5 times in comparison with a reference value.

Impact of Electrolytic-Plasma Nitriding on 34CrNi1Mo Steel Surface Layer Properties

“…The 31.4. The main idea of electrolytic plasma treatment lies in the fact that electrodes are immersed in a bath of an aqueous electrolyte solution, one of which is a sample.A negative voltage is applied o the sample [2]. The appearance of electrolyte plasma becomes possible when the anode area exceeds the product area by ~ 5 times.…”