Influence of the modifying ability of various compositions on the microstructure and properties of the AK7ch alloy
https://doi.org/10.17073/0021-3438-2015-5-4-10
Abstract
The results of experimental studies of the AK7ch Al–Si alloy before and after modifying with compositions—(i) the K2ZrF6 industrial modifier, (ii) modifying mixture based on oxides of refractory metals and cryolite, and (iii) the «Arsal 2120» foreign flux – are presented.
It is established that modification of the AK7ch alloy leads to the uniform distribution of eutectics (α-Al + β-Si), structural components, decrease in silicon crystals by a factor of 1,5–2,0 on average, refining, and variation in shape of Fe-containing phases. It is shown that an increase in relative elongation by a factor of 2 and more is characteristics for all modified samples, and the tensile strength, hardness, and density of casts for all the samples are different and has an ambiguous character.
About the Authors
A. P. Zykova
Национальный исследовательский Томский государственный университет
Russian Federation
Russian Federation
L. A. Kazantseva
Национальный исследовательский Томский государственный университет
Russian Federation
Russian Federation
I. A. Kurzina
Национальный исследовательский Томский политехнический университет
Russian Federation
Russian Federation
V. Kh. Dammer
Научно-производственный центр «Полюс», г. Томск
Russian Federation
Russian Federation
A. V. Chumaevskii
Томский государственный архитектурно-строительный университет
Russian Federation
Russian Federation
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Review
For citations:
Zykova A.P., Kazantseva L.A., Kurzina I.A., Dammer V.Kh., Chumaevskii A.V. Influence of the modifying ability of various compositions on the microstructure and properties of the AK7ch alloy. Izvestiya. Non-Ferrous Metallurgy. 2015;(5):4-10. (In Russ.) https://doi.org/10.17073/0021-3438-2015-5-4-10
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