Method of Electrolyte-Plasma Surface Hardening of 65G and 20GL Low-Alloy Steels Samples

7th International Scientific Practical Conference "Innovative Technologies in Engineering"

Rakhadilov, Bauyrzhan^1 ; Zhurerova, Laila^1 ; Pavlov, Alexander^2

D. Serikbaev East Kazakhstan State Technical University, Serikbaev str. 19, Ust Kamenogorsk city

070010, Kazakhstan^1

S. Amanzholov East Kazakhstan State University, 30 Gvardeiskoi divisii str. 34, Ust Kamenogorsk city

070002, Kazakhstan^2

关键词: Ferrite-pearlite structure;    Initial state;    Martensite phase;    Modified surfaces;    Plasma surfaces;    Railway transport;    Structural-phase state;    Water solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/142/1/012028/pdf
DOI  :  10.1088/1757-899X/142/1/012028

来源: IOP

【 摘 要 】

This work is devoted to formation of modified surface layers in 65G and 20GL steels which using for the manufacture of railway transport parts, as well as the study of influence of the parametersof electrolyte-plasma surface hardening methodon the changes in structural-phase states, improving of wear-resistance. The process of electrolyte-plasma surface hardening of 65G and 20GL steels samples conducted in the electrolyte from water solution of 20% sodium carbonate, in the mode ∼850°C - 2 seconds, ∼1200°C - 3 seconds. It is established that in the initial state 20GL steel has ferrite-pearlite structure, and the 60G steel consists of pearlite and cement structure. After application of electrolyte-plasma surface hardening is observed the formation of carbides particles and martensite phase components in the structure of 20GL and 60G steels. It is determined that after electrolyte-plasma surface hardening with heating time - 2 seconds, the abrasive wear-resistance of 65G and 20GL steels increased to 1.3 times and 1.2 times, respectively, and the microhardness is increased to 1.6 times and 1.3 times, respectively.