| Autor: |
Tolochyna, Oleksandra, Tolochyn, Oleksandr, Bagliuk, Gennadii, Podrezov, Yury, Zgalat-Lozynskyy, Ostap, Okun, Igor |
| Předmět: |
|
| Zdroj: |
JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Mar2023, Vol. 75 Issue 3, p825-836, 12p |
| Abstrakt: |
Optimizing temperature-kinetic heating conditions is an important component of powder technology. This problem is especially acute in heterogeneous systems, where in addition to traditional issues of contact formation, it is necessary to consider the patterns of heterodiffusion, which determine the phase composition and affect the processes of loosening according to the Kirkendall and Frenkel effects. The results of DTA, dilatometric and x-ray studies were subsequently used to optimize the technological modes of hot forging. The effects thermo-kinetic parameters of heating and hot forging temperature on compaction and physico-mechanical properties of iron aluminide were examined. A comparison of the results of studies of forged samples that were heated at different speeds and forged at the same temperature shows the insignificant advantages of slow heating at low forging temperatures, where the process of phase formation and the formation of a high-quality contact has not yet been completed. At higher forging temperatures and additional annealing, these differences practically disappear. Considering the technological difficulties of slow heating, it is advisable to use rapid heating to temperatures of 1100–1220°C, hot forging at these temperatures and subsequent annealing at temperatures of 1300°C for 30 min as the basic mode of thermo-mechanical treatment. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink