Evolution of the structure and mechanical properties of a bulk-nitrided corrosion-resistant ferritic steel upon tempering in the temperature range of 400–700°C
- Авторы: Rogachev S.1, Nikulin S.1, Khatkevich V.1
-
Учреждения:
- National University of Science and Technology MISiS
- Выпуск: Том 118, № 8 (2017)
- Страницы: 782-787
- Раздел: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/167172
- DOI: https://doi.org/10.1134/S0031918X17080130
- ID: 167172
Цитировать
Аннотация
Methods of the X-ray diffraction analysis and electron microscopy were used to study changes in the structural phase state and mechanical properties of bulk-nitrided 08Kh17T steel (0.08 wt % C, 17 wt % Cr, 0.8 wt % Ti, 0.5 wt % Si, 0.8 wt % Mn, 0.025 wt % S, and 0.035 wt % P) upon tempering in the temperature range of 400–700°C. The changes in the mechanical properties of the nitrided steel upon tempering are associated with the predominance of either the solid-solution or precipitation strengthening, i.e., with the presence of martensite in the steel structure at low temperatures of tempering and the precipitation of particles of Cr2N nitrides of different dispersity upon increasing the tempering temperature. The greatest increase in the ultimate tensile strength and yield stress (1.8–2.5 times) at a satisfactory plasticity (no less than 10%) of the bulk-nitrided steel is achieved by tempering bulk-nitrided steel in a temperature range of 600–700°C.
Ключевые слова
Об авторах
S. Rogachev
National University of Science and Technology MISiS
Автор, ответственный за переписку.
Email: csaap@mail.ru
Россия, Leninskii pr. 3, Moscow, 119049
S. Nikulin
National University of Science and Technology MISiS
Email: csaap@mail.ru
Россия, Leninskii pr. 3, Moscow, 119049
V. Khatkevich
National University of Science and Technology MISiS
Email: csaap@mail.ru
Россия, Leninskii pr. 3, Moscow, 119049