Effect of the AlCr20 Addition on the Microstructure of Secondary AlSi7Mg0.3 Alloy

Journal title

Archives of Foundry Engineering




No 2

Publication authors


Secondary AlSi7Mg0.3 based alloys ; Iron phases ; Thermal analysis ; Iron correctors ; AlCr20 ; Heat treatment

Divisions of PAS

Nauki Techniczne


Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.


This paper deals with influence of chrome addition and heat treatment on segregation of iron based phases in the secondary alloy

AlSi7Mg0.3 microstructure by chrome and heat treatment. Iron is the most common and harmful impurity in aluminum casting alloys and

has long been associated with an increase of casting defects. In generally, iron is associated with the formation of Fe-rich intermetallic

phases. It is impossible to remove iron from melt by standard operations, but it is possible to eliminate its negative influence by addition

some other elements that affect the segregation of intermetallics in less harmful type or by heat treatment. Realization of experiments and

results of analysis show new view on solubility of iron based phases during melt preparation with higher iron content and influence of

chrome as iron corrector of iron based phases.


The Katowice Branch of the Polish Academy of Sciences




Artykuły / Articles


ISSN 2299-2944