Effect of Deep Cryogenic Treatment on Mechanical and Tribological Properties of PM S390 MC High-Speed Steel

Sanja Šolić; Franjo Cajner; Vojteh Leskovšek

doi:10.3139/120.110380

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Effect of Deep Cryogenic Treatment on Mechanical and Tribological Properties of PM S390 MC High-Speed Steel

Sanja Šolić , Franjo Cajner und Vojteh Leskovšek

Veröffentlicht/Copyright: 26. Mai 2013

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Abstract

Application of deep cryogenic treatment instead of conventional heat treatment showed an increase in wear resistance of tools made of high speed steel which are exposed to very complex and demanding conditions in exploitation. The purpose of this study was to investigate the effect of deep cryogenic treatment in combination with plasma nitriding on the tribological properties of powder metallurgy high speed steel, grade PM S390 MC. On treated specimens hardness and fracture toughness was determined, the resistance to intensive adhesive wear (galling) and dry sliding wear (dry sliding wear resistance) were also tested. Test results show that deep cryogenic treatment in combination with plasma nitdriding contributes to better abrasive wear resistance and better galling properties of tested powder metallurgy high speed steel.

Kurzfassung

Die Anwendung von Tieftemperaturbehandlungen anstelle von konventioneller Wärmebehandlungen zeigte einen Anstieg des Verschleißwiderstandes von Werkzeugen aus einem Hochgeschwindigkeitsstahl, die sehr komplexen und anspruchsvollen Bedingungen bei der Rohstoffgewinnung ausgesetzt werden. Das Ziel der diesem Beitrag zugrunde liegenden Studie war es, die Wirkungen von Tieftemperaturbehandlungen in Kombination mit dem Plasmanitrieren auf die tribologischen Eigenschaften des pulvermetallurgischen Hochgeschwindigkeitsstahles PM S390 MC zu untersuchen. Bei den vorbehandelten Proben wurden die Härte und die Bruchzähigkeit gemessen sowie der Widerstand gegen intensiven adhäsiven Verschleiß (Fressverschleiß, engl.: galling) und Trockengleitverschleiß (dry sliding wear) untersucht. Die Versuchsergebnisse zeigten, dass die Tieftemperaturbehandlung in Kombination mit dem Plasmanitrieren zu einem besseren Abrasivverschleißwiderstand und besseren Fressverschleißeigenschaften bei dem geprüften pulvermetallurgischen Hochgeschwindigkeitsstahl führt.

Dr. Sanja Šolić, born in 1975, finished mechanical engineering at the Faculty of Mechanical Engineering and Naval Architecture (FMENA), University of Zagreb, Croatia, and received her PhD in material science. She is working as senior research assistant at FMENA. Areas of her research are heat treatment, surface engineering, tribology, microstructure and material characterization.

Prof. Dr. Franjo Cajner, born in 1950, is professor at the Faculty of Mechanical Engineering and Naval Architecture, in the Department for Material Science, Chair for Heat Treatment and Surface Engineering, Slovenia. Areas of his research are heat treatment and surface engineering.

Prof. Dr. Vojteh Leskovšek, born in 1947, is professor at the Institute of Metals and Technology in Ljubljana, University of Zagreb, Croatia. Areas of his research are vacuum heat treatment, fracture mechanics, surface engineering, numerical simulations of heat treatment and surface modification processes.

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Published Online: 2013-05-26

Published in Print: 2012-10-01

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https://doi.org/10.3139/120.110380