Abstract
In this work, a solution heat treatment of Al-Si-Mg-Cu casting alloy was analyzed. A new short solution heat treatment (SHT) with only 60 min has been allowed. The results revealed that this short SHT enables the improvement of the dendritic structure and the spheroidization of the eutectic silicon particles. Furthermore, the alloy showed improved mechanical properties when compared to the same alloy subjected to a longer SHT of 4 h. It was observed that increasing the SHT temperature can accelerate the dissolution and homogenization of the silicon particles and intermetallic precipitates in the matrix.
Kurzfassung
Im Rahmen dieser Arbeit wurde eine Lösungsglühbehandlung von Al-Si-Mg-Cu-Gusslegierung untersucht. Dabei handelte es sich um ein neues, kurzes Lösungsglühen (Solution Heat Treatment, SHT) einer Dauer von lediglich 60 min. Die Ergebnisse zeigten, dass dieses kurze SHT eine Verbesserung der dendritischen Struktur und der Einformung der eutektischen Siliciumpartikel ermöglicht. Darüber hinaus wies die so behandelte Legierung im Vergleich mit der gleichen Legierung, die einer längeren SHT-Behandlung von 4 h unterzogen wurde, verbesserte mechanische Eigenschaften auf. Es konnte festgestellt werden, dass die Auflösung und Homogenisierung der Siliciumpartikel und Bildung von intermetallischen Ausscheidungen in der Matrix durch eine Erhöhung der SHT-Temperatur beschleunigt werden kann.
About the authors
received his master degree from Hefei University of Technology with a major in metallic material engineering. His research is mainly focused on the microstructure and mechanical properties of light alloys, especially Al-Si alloys.
born in 1966, is a doctoral supervisor as well as Head of the Metal Materials Engineering Department and the School of Materials Science and Engineering at Hefei University of Technology. He graduated from Hefei University of Technology with an MSc in Materials Science in 1993 and then taught at the university. He graduated from Hefei University of Technology with a doctoral degree in Materials Science in 2006. He is mainly engaged in the research and development of high-performance metal materials.
Acknowledgments
The authors are grateful for the financial support from the Key Technology R&D Program of Anhui Province (201904a05020084), the Industrial guiding fund of changfeng county, and Hefei university of technology (JZ2019QTXM0281), and the fund of Anhui Wanan Co.Ltd (W2019JSKF0210).
Danksagung
Die Autoren bedanken sich für die finanzielle Unterstützung im Rahmen des Key Technology R&D Program (etwa: Programm für Schlüsseltechnologie, Forschung und Entwicklung) der Anhui Province (201904a05020084) und durch den Industrial Guiding Fund (etwa: Fonds zur Führung der Industrie) des Kreises Changfeng, die Technische Universität Hefei (JZ2019QTXM0281) und den Fonds von Anhui Wanan Co. Ltd (W2019JSKF0210).
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