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ŞCURPELO, Anatolie; MIKHAILOV, Valentin; PERETJATKU, Pavel; CRACAN, Cornel. Cementation of steel 3 at anode electrolyte heating in the magnetic field. In: Materials Science and Condensed Matter Physics. Editia a 7-a, 16-19 septembrie 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2014, p. 326.
|Materials Science and Condensed Matter Physics
Editia a 7-a, 2014
Conferința "Materials Science and Condensed Matter Physics" |
Chișinău, Moldova, 16-19 septembrie 2014
Influence of a magnetic field on process of cementation of steel 3 was investigated at anode electrolytic heating. The end face of the flat sample with depth of immersing by the little more its thickness was processed. Duration of processing of 2 minutes, cooling in air. The magnetic induction influences dynamics of charged particles in electrolyte plasma and in metal of the heated anode. It makes some changes in diffusive process in the superficial layer of the anode. With growth of the magnetic induction, parallel to the processed surface (BIIS), the tangential component in ionic and diffusive movement increases. It influences depth of their diffusion in an external layer of a processed metal surface Fig.1. Dependences of thickness of a white layer (a), of thickness of a zone of diffusion and a zone of thermal influence (b) from value and a direction of a magnetic induction (in relation to a surface of the sample). X-ray diffractometer researches ( scheme of coverage - θ/2θ) have shown, that with increase of a magnetic induction (B = 0,12Т; B ┴ S) oxides of higher oxidation level decrease or are not shown (B = 0,12Т; BIIS). On the other hand, with increase of magnetic induction at B ┴ S (0.12 Т), in the superficial layer of the sample after cementation the portion of retained austenite (γ — Fe; Fe — C) increases. To a lesser degree it occurs at BIIS (0.12 Т). Indirectly it means change of electrode potential of a material of the superficial layer of the sample. It is initiated by increase in diffusion of carbon in narrower superficial layer with growth of a magnetic induction and corresponding displacement of phase composition.