Authors: K.A. Korsunov, E.R. Maluta, R.V. Esselbakh

Title of the article: Plasma surface hardening with liquid electrode plasma generator

Year: 2024, Issue: 5, Pages: 30-39

Branch of knowledge: 2.5.6. Engineering technology

Index UDK: 621.785.54

DOI: 10.26730/1999-4125-2024-5-30-39

Abstract: Plasma strengthening of materials is an effective method for improving mechanical properties such as strength, hardness and wear resistance. The proposed method is relevant, as it is suitable for parts of complex shape, allows to treat hard-to-reach surfaces or thin walls, also allows to control the hardening process accurately enough, which provides high repeatability of results. Existing methods of surface hardening are energy and resource intensive. The proposed model of plasmatron with liquid electrode allows combining simplicity of construction, relative cheapness of the unit manufacturing, lack of requirements to the shape of the part with high performance of the hardened surface, sufficient to meet the requirements of modern technological processes. The authors have carried out a comparative analysis of the characteristics of plasma heating and energy parameters of heating of metallic materials. The disadvantages of the existing methods are indicated. The results of the effect of electrolyte-plasma treatment on the structural-phase transformations in the studied samples are presented. The electrical scheme of the plasma installation is proposed. It is shown that the use of liquid electrode in the plasmatron promotes more effective energy influence on the treated surface, which allows to reach greater hardening depths in comparison with traditional methods of plasma treatment. Experimental studies have demonstrated an increase in the main indicator of plasma hardening - hardness. The presented data show that the surface hardness after plasma treatment can exceed the hardness values obtained by any other treatment method. The microstructure of samples before and after treatment has been studied. Advantages of the considered method of treatment in comparison with other technologies are revealed.

Key words: plasma treatment microstructure hardening hardness phase structure

Receiving date: 02.06.2024

Approval date: 29.09.2024

Publication date: 24.10.2024

CITE DOWNLOAD