INFUENCE OF MODIFIERS ON THE CHANGE OF MECHANICAL PROPERTIES OF SILUMINS
https://doi.org/10.17073/0021-3438-2017-3-72-76
Abstract
An increase in the sum of alloying elements in industrial silumins causes excess intermetallic phases to form in their structure. When the amount of modifiers introduced into such alloys exceeds a certain amount, structural components coarsen due to overmodification, which may cause deterioration of mechanical properties of cast alloys. As the amount of alloying elements in alloys increases from 7,35 % (АК7ch) to 14,3 % (АК10М2N), the optimum consumption of the modifying microcrystalline remelt decreases from 0,6 to 0,3 wt.%. The optimum amount of introduced titanium is reduced from 0,05 to 0,01 % when using the AlTi5 master alloy and from 0,02 to 0,01 % when using the AlTi5B1 master alloy. With an increase in the silicon content, the modifying effect of the AlSr10 master alloy is enhanced, while the amounts of strontium introduced into alloys are smaller. The paper demonstrates that metallic modifier consumption depends on its modifying property, as well as on the sum of alloying elements in the modified silumin.
About the Authors
K. V. Nikitin
Samara State Technical University
Russian Federation
Russian Federation
Dr. Sci. (Tech.), associate prof., dean of the faculty of mechanical engineering, metallurgy and transport
(443100, Russia, Samara, Molodogvardeiskaya str., 244)
V. I. Nikitin
Samara State Technical University
Russian Federation
Dr. Sci. (Tech.), prof., head of the Department of foundry and high-efficiency technologies
Russian Federation
Dr. Sci. (Tech.), prof., head of the Department of foundry and high-efficiency technologies
I. Yu. Timoshkin
Samara State Technical University
Russian Federation
Cand. Sci. (Tech.), associate prof. of the Department of foundry and high-efficiency technologies
Russian Federation
Cand. Sci. (Tech.), associate prof. of the Department of foundry and high-efficiency technologies
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Review
For citations:
Nikitin K.V., Nikitin V.I., Timoshkin I.Yu. INFUENCE OF MODIFIERS ON THE CHANGE OF MECHANICAL PROPERTIES OF SILUMINS. Izvestiya. Non-Ferrous Metallurgy. 2017;(3):72-76. (In Russ.) https://doi.org/10.17073/0021-3438-2017-3-72-76
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