Tytuł artykułuThe Influence of Small Amounts of Aluminium on the Effectiveness of Cast Iron Spheroidization with Magnesium
Tytuł czasopismaArchives of Foundry Engineering
Słowa kluczoweMetallography ; Aluminium ; cast iron ; Spheroidization ; Graphite precipitates
Wydział PANNauki 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.
The influence of aluminium added in amounts of about 1.6%, 2.1%, or 2.8% on the effectiveness of cast iron spheroidization
with magnesium was determined. The cast iron was melted and treated with FeSiMg7 master alloy under industrial conditions.
The metallographic examinations were performed for the separately cast rods of 20 mm diameter. They included the assessment of the
shape of graphite precipitates and of the matrix structure. The results allowed to state that the despheroidizing influence of aluminium
(introduced in the above mentioned quantities) is the stronger, the higher is the aluminium content in the alloy. The results of examinations
carried out by means of a computer image analyser enabled the quantitative assessment of the considered aluminium addition influence.
It was found that the despheroidizing influence of aluminium (up to about 2.8%) yields the crystallization of either the deformed nodular
graphite precipitates or vermicular graphite precipitates. None of the examined specimens, however, contained the flake graphite
precipitates. The results of examinations confirmed the already known opinion that aluminium widens the range of ferrite crystallization.
WydawcaThe Katowice Branch of the Polish Academy of Sciences
TypArtykuły / Articles