Modifikacija zlitine AlSi7Mg lite v pesceno formo/Modification of AlSi7Mg alloy cast in to a sand mould

In this work the effect of commercial strontium and sodium (SIMODAL 77) modifiers in sand cast AlSi7Mg alloy were evaluated. Castings with different wall thickness were prepared to evaluate the effect of modifiers at different cooling rates. Light microscopy was used to assess the effect of eutectic...

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Bibliographic Details
Published inLivarski vestnik Vol. 63; no. 1; p. 37
Main Authors Naglic, I, Ilic, S, Markoli, B, Dolenec, M, Leskovar, B, Filipic, Z, Perhoc, M, Kraner, J, Bizjak, M, Skela, B, Kelhar, L, Kozole, S, Gercar, D, Ramsak, T
Format Journal Article
LanguageSlovenian
Published Ljubljana Slovenian Foundrymen Society/Drustvo Livarjev Slovenije 01.01.2016
Subjects
Aluminum alloys
Casting
Microstructure
Modifications
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Summary:In this work the effect of commercial strontium and sodium (SIMODAL 77) modifiers in sand cast AlSi7Mg alloy were evaluated. Castings with different wall thickness were prepared to evaluate the effect of modifiers at different cooling rates. Light microscopy was used to assess the effect of eutectic silicon modification. It was found that 0.3 % (mass fraction in this article) of modifier SIMODAL 77 and between 0.02 and 0.03 % Sr effectively modified the eutectic silicon in AlSi7Mg alloy castings with wall thickness of 10 and 20 mm. Eutectic silicon was not fully modified when the wall thickness was 40 mm. Eutectic silicon remained modified after remelting in the case of strontium whilst sodium from SIMODAL 77 failed in this respect.
ISSN:0024-5135