The influence of processing modes on second-phase particles of ferritic-martensitic steel EP-823 | Izvestiya vuzov. Fizika. 2022. № 12. DOI: 10.17223/00213411/65/12/111

The influence of processing modes on second-phase particles of ferritic-martensitic steel EP-823

The features of the carbide subsystem of 12% chromium heat-resistant ferritic-martensitic steel EP-823 after its traditional heat (THT) and high-temperature thermomechanical (HTMT) treatments are studied. After both treatments, coarse M₂₃C₆ carbides (M-Fe, Cr) and MX carbonitrides (M - Nb, Mo, V; X - C, N), as well as nanosized MX particles, are observed in the steel. HTMT leads to a decrease in the average size and surface density of M₂₃C₆ carbides and a simultaneous increase of the volume fraction of fine MX carbonitrides with a decrease in their average size compared to THT. According to the estimates of the level of dispersion strengthening by the detected particles of the second phases according to the Orowan mechanism, nanosized particles of the carbonitride phase provide the most significant contribution to the yield strength of EP-823 steel. The increase of its dispersion and the volume fraction after HTMT is one of the reasons for the higher values of the steel strength properties relative to THT.

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Keywords

ferritic-martensitic steels, thermomechanical treatment, carbide subsystem, dispersed particles, dispersion strengthening

Authors

Name	Organization	E-mail
Linnik V.V.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Science; National Research Tomsk State University	lera.linnik.1999@mail.ru
Polekhina N.A.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Science	nadejda89tsk@yandex.ru
Litovchenko I.Yu.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Science	litovchenko@ispms.ru
Almaeva K.V.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Science	kseni_ya_almaeva@mail.ru
Akkuzin S.A.	Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Science	s.akkuzin@ispms.ru
Chernov V.M.	Bochvar High-Technology Research Institute of Inorganic Materials	vmchernov@bochvar.ru
Leontyeva-Smirnova M.V.	Bochvar High-Technology Research Institute of Inorganic Materials	mvleonteva-smirnova@bochvar.ru

Всего: 7

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