Registration Number
0221U104710,
0118U003625
, R & D reports
Title
Theoretical and practical background for management of crystallization processes and properties of aluminum alloys using external factors impact on melt structure.
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Head
Prygunova Adel G., Доктор технічних наук
Registration Date
06-04-2021
Organization
Physico-technological institute of metals and alloys National academy of Sciences of Ukraine
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The works were carried out to establish the mechanism of formation of iron-containing phases in pre-eutectic aluminum-silicon alloys with iron content up to 3.3%, patterns of changes in their structure and morphology under the influence of temperature, cooling rate, external factors influencing liquid and liquid solid state by electric current. vibration, mechanical activation treatment, flooding; development of recommendations for further development and practical use of results in the manufacture of silumins from scrap and waste with high iron levels.
For the first time, the order of formation of iron-containing phases in pre-eutectic aluminum-silicon alloys with an iron concentration of 0.83 wt.% - 3.3 wt.% During curing was experimentally determined.
Using mathematical modeling, a method for predicting the structural zones of the casting in the process of its formation, which was tested in the study of the effect of temperature on the structure of the alloy AK5M2. Methods for neutralizing the harmful effects of iron by treating the melt with a pulsed electric current, which lead to changes in the crystallization process, are proposed.
For the first time a method of pulsed-cyclic processing of the melt by electric current was developed.
Vibration, mechanoactivation treatment of the melt by the rotor also lead to changes in the structure, morphology of iron-containing phases during curing and, accordingly, mechanical properties. its use for degassing and obtaining castings with a high level of properties due to the globulation of primary crystals of solid aluminum solution, which is reflected in the relevant acts.
Product Description
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Belik Valentyn I
Borisov Andriy G.
Neduzhyi Artem M
Prygunova Adel G.
Tarasevych Mykola I
Tsir Taras G.
Sheygam Valeriy Y
Shcheretskyi Oleksandr A
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2021-04-06
