2024 - Sustainable Industrial Processing Summit
SIPS 2024 Volume 5. Leite Intl. Symp / Iron and Steel
| Editors: | F. Kongoli, P. Assis, R. Alvarenga Vilela, J.A. de Castro, B. Deo, W. Ferreira Santos Jr., GS. Mahobia, T. Usui |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2024 |
| Pages: | 328 pages |
| ISBN: | 978-1-998384-12-9 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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THE TECHNOLOGY OF THERMO-TEMPORAL TREATMENT OF IRON-BASED MELTS
Vladimir Tsepelev1; Kaiming Wu2; Daniil Shvetcov 3; Nadezda Konovalova1;1BORIS YELTSIN URAL FEDERAL UNIVERSITY, Ekaterinburg, Russian Federation; 2WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Wuhan, China; 3URAL FEDERAL UNIVERSITY, Yekterinburg, Russian Federation;
Type of Paper: Regular
Id Paper: 400
Topic: 2
Abstract:
The kinematic viscosity of samples of Fe73.5Cu1M3Si13.5B9 iron-based magnetically soft alloy with different inhibitors M = Nb, Mo, V, Cr in heating and cooling regimes has been studied. Polytherms of physical properties were obtained and activation energies of viscous flow were calculated. It is shown that the greatest nonlinearity of the temperature dependence of viscosity in logarithmic and inverse scales is observed in the heating process [1].
Maturation of the melt at a fixed temperature is accompanied by viscosity fluctuations, the amplitude of which significantly exceeds the random error of measurement. The greatest temporal instability of the melt is observed at the temperature of structural transformations. The reason for the oscillations may be the transition from the non-equilibrium structure of the melt, inherited from the initial crystalline phases, to the equilibrium state associated with the periodic appearance and destruction of cluster structures and intensive structural reorganization of the melt [2].
The study of multicomponent melts shows that the structures of liquid and solid states are interrelated. The most homogeneous structure has a melt heated above the critical temperature, which corresponds to the temperature of structural transformation. Amorphous precursor obtained from homogeneous melt has higher plasticity and hardness, higher enthalpy of crystallization [3]. After nanocrystallization of the amorphous precursor obtained from a superheated melt, a material with higher permeability was obtained, with an increased fraction of small nanocrystals of 2 nm.