Effect of Alloying Elements on the Tooling Capabilities of High Speed Steels Fabricated by Powder Metallurgy

Guven Orkun Toptop; Alptekin Kisasoz; Ahmet Karaaslan

doi:10.3139/120.110401

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Effect of Alloying Elements on the Tooling Capabilities of High Speed Steels Fabricated by Powder Metallurgy

Guven Orkun Toptop , Alptekin Kisasoz und Ahmet Karaaslan

Veröffentlicht/Copyright: 26. Mai 2013

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Abstract

SPM 10 and ASP 2052 alloys fabricated by powder metallurgy have a higher alloying elements content than rolled types. Such higher alloying contents improve the mechanical properties of tool steels and provide a longer tooling life. In this study, the effects of alloying elements and different heat treatments processes on the properties of SPM 10 and ASP 2052 were investigated. Also, the effects of alloying elements and process parameters on the mechanical properties as well as tooling abilities of the specimens were studied. The specimens were characterized by Rockwell hardness tests and the tooling abilities of the specimen were determined by characterizing the number of screws that could be fabricated with specimens. According to the results of the experiments, higher hardness values were obtained at elevated austenitization temperatures. Besides, the presence of Co as an alloying element evolved better hot work properties of the specimens.

Kurzfassung

Die Legierungen SPM 10 und ASP 2052, die pulvermetallurgisch hergestellt werden, haben höhere Legierungselementanteile als herkömmlich produzierte Varianten. Diese höheren Legierungselementanteile verbessern die mechanischen Eigenschaften der Werkzeugstähle und ermöglichen eine längere Werkzeuglebensdauer. In der diesem Beitrag zugrunde liegenden Studie wurden die Auswirkungen der Legierungselemente sowie verschiedene Wärmebehandlungen auf die Eigenschaften von SPM 10 und ASP 2052 untersucht. Außerdem wurden die Auswirkungen der Legierungselemente und Prozessparameter auf die mechanischen Eigenschaften und die Werkzeugfähigkeit der Proben untersucht. Die Proben wurden entsprechend mittels Rockwell-Härte charakterisiert und die Werkzeugeigenschaften anhand der Zahl der Schrauben, die damit gefertigt werden konnten, bestimmt. Entsprechend der experimentellen Ergebnisse wurden höhere Härtewerte bei erhöhten Austenitisierungstemperaturen erreicht. Außerdem ergibt Co als Legierungselement bessere Warmarbeitseigenschaften der Proben.

Guven Orkun Toptop, born in 1986, received his BS degree in Metallurgical and Materials Engineering from Yildiz Technical University, Istanbul, Turkey in 2008. He received his MSc degree in Materials Science and Engineering from Yildiz Technical University, Istanbul, Turkey in 2011. He has been employed at QTS as head of heat treatment department since 2009. He is working on tool steels.

Alptekin Kisasoz, born in 1985, received his BS degree in Metallurgical and Materials Engineering from Yildiz Technical University, Istanbul, Turkey in 2008. He has been employed at the department of Metallurgical and Materials Engineering of Yildiz Technical University as research assistant since 2009. He received his MSc degree from the same department in 2010. He is working on metal matrix composites, tool steels and welding metallurgy.

Prof. Dipl.-Ing. Mont. Ahmet Karaaslan, born in 1968, studied Metallurgy and Materials Engineering from 1986 to 1990 at Yildiz Technical University, Istanbul, Turkey, and received his doctoral degree in 1999 at the Institute for Metals Science and Materials Testing at the Montan-University in Loeben, Austria. Since 1999 he is in the section Materials Engineering at the Yildiz Technical University, Istanbul, Turkey.

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Published Online: 2013-05-26

Published in Print: 2013-01-01

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https://doi.org/10.3139/120.110401