|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Kinetics of Transformationof Retained Austenite in Maraging Steel after Double Annealingat Subzero Temperatures and Loadsстатья
- Авторы: Makhneva T.M., Dementyev V.B., Sukhikh A.A.
- Журнал: Technical Physics
- Том: 67
- Номер: 7
- Год издания: 2022
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 588
- Последняя страница: 592
- DOI: 10.1134/S1063784222080059
- Аннотация: This paper studies the influence of mechanical tensile loads in the range of 0–300 MPa on thenature of transformation in cold-rolled maraging steel in the temperature range of –20…–60С. Basedon the kinetic curves of the electrical resistance, critical temperatures Mbeg and Mend were determined and thediagrams of the isothermal decomposition of supercooled retained austenite annealed in the two-phaseregion after two cycles at a temperature of 650C for 6 h were plotted. It has been established that mechanicalloads in the range of 20–300 MPa affect the parameters of the gamma-alpha transformation ambiguously,shifting the isothermal diagrams in temperature and time and significantly changing the stability characteristicsof austenite. Resistance of austenite to supercooling Ts varies from –25 to –55С, incubation period incfrom 2 to 8 min, and decay period dec with two extremes (50 and 100 MPa) from 51 to 518 min depending onthe load level. The recorded maximum duration of the annealing austenite decomposition at low loads (20–100 MPa) is explained by the structural and chemical inhomogeneity of the phases, as well as the stress levelof the initial state of the samples under study. The threshold stress is determined, loading up to which leadsto a decrease by ∼15С in the beginning of the transformation in the interval of subzero temperatures(from –40 to –55C). It can be assumed that the shift of the diagrams to the range of low temperatures is dueto a change in the mechanism of the transformation. It is shown that cyclic heat treatment in the twophaseregion at a temperature of 650C for 6 h at loads up to 100 MPa delays the isothermal decompositionof supercooled retained austenite in the steel under study.
- Добавил в систему: Сухих Аркадий Анатольевич