Structural-phase transformations in 0.34C–1CRr–1Ni–1Mo–Fe steel during plasma electrolytic hardening

• Autorzy: Rakhadilov B. K. , Kozhanova R. S. , Popova N. A. , Nugumanova A. B. , Kassymov A. B.

Identyfikatory

DOI

10.2478/msp-2020-0073

• Języki publikacji: EN

Abstrakty

EN

Structural-phase transformations in 0.34C–1Cr–1Ni–1Mo–Fe steel during plasma electrolytic hardening were investigated. Electrolytic-plasma hardening of steel samples was carried out by surface quenching with rapid concentrated heating of the surface by plasma action and subsequent rapid cooling by heat removal from the depth of the sample by electrolyte jet. Plasma electrolytic hardening was carried out in the cathode mode in an electrolyte made from an aqueous solution containing 20 % sodium carbonate and 10 % carbamide. To study the structural-phase states of the modified layer, we used the method of transmission diffraction electron microscopy on thin foils. The study of steel samples was carried out before and after the plasma electrolytic hardening. Initially, the steel was a mixture of pearlite and ferrite grains. Surface hardening of 0.34C–1Cr– 1Ni–1Mo–Fe ferrite-pearlite steel led to a change in the structural-phase state and the formation of a packet-lamellar martensite structure. It was found that PEH leads to distortion of the crystal lattice and the formation of long-range internal stresses, as well as to the release of small particles of cementite and carbide of M23C6 type, uniformly distributed throughout the volume of the material. Surface hardening led to the increase in all quantitative parameters of the fine structure (ρ, ρ±, χ, σL, σd).

Słowa kluczowe

EN

electrolyte-plasma hardening; modified layer; steel; ferrite; perlite; packet martensite; plate martensite

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 4
• Strony: 699--706
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Rakhadilov B. K.

• Non-profit limited company Sarsen Amanzholov East Kazakhstan University, 30 Gvardeiskoi Divisii St. 34, 070020, Kazakhstan

autor

Kozhanova R. S.

• Plasma Science LLP, 37 Serikbaev St., 070010, Kazakhstan

autor

Popova N. A.

• Tomsk State Architecture and Building University, 2 Solyanaya Sq., 634003, Russia

autor

Nugumanova A. B.

• Non-profit limited company Sarsen Amanzholov East Kazakhstan University, 30 Gvardeiskoi Divisii St. 34, 070020, Kazakhstan

autor

Kassymov A. B.

• Shakarim University, 20A Glinka St., 071412, Kazakhstan

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).