Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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METALLOGRAPHIC ANALYSIS OF STEEL SURFACE 65G AFTER ELECTRICAL DISCHARGE MACHINING

Panov D.O. 1 Ablyaz T.R. 1 Abrosimova A.A. 1
1 Perm national research polytechnic university
The aim of this work is to identify the features of the structure of the surface layer of steel 65G formed as a result of treatment with different modes on wire – cut-out machine. This paper investigated the steel of 65G for GOST14959 -70. Pre 65G steel was hardened from a temperature of 800 ° C in the oil and subsequent tempering at an average temperature of 450 ° C for 3 hours. Electro-erosion process was carried out on wire-discharge wire cutting machines firms Electronica model Ecocut, working environment of the liquid - distilled water. As the electrode – wire instrument, brass brand L68. White layer formed by EDM machining, studied by metallographic analysis. Metallographic analysis was performed using a light microscope Olympus GX 51 at magnifications up to 1000-fold in the etched microsections. The experiment results plotted the frequency location of breakdowns in the surface layer and the layer depth of the treatment regime. The results of metallographic studies we can conclude that the maximum depth of the white layer achieved if the maximum mode . The study found that the average machining mode ensures optimal ratio between the depth of the white layer and productivity.