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Metals 2017, 7(4), 121;

Influence of NbC Addition on the Sintering Behaviour of Medium Carbon PM Steels

Department of Manufacturing Engineering, Karabük University, Karabük 78050, Turkey
Turkish Chambers and Stock Exchange Technical Science Vocational School, Karabük University, Karabük 78050, Turkey
Author to whom correspondence should be addressed.
Academic Editor: Laichang Zhang
Received: 9 February 2017 / Revised: 27 March 2017 / Accepted: 28 March 2017 / Published: 1 April 2017
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In this work, the effects of NbC additions on the microstructure and mechanical properties were examined. In order to do this, NbC compounds were added into the Fe matrix at the weight percentage of 0.1–2 with individually to obtain powder mixture. The microstructure of the powder metallurgy (PM) steels were characterized by optic microscope, scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). Experimental results indicated that NbC alloyed steels can be produced by PM technology. An increase in strength was observed when the amount of NbC compounds increased for all PM steels. The precipitation of carbides and nitrides in these steels limits austenite grain growth and increases the precipitation hardening or clustering hardening that results in significant improvement in strength. View Full-Text
Keywords: powder metallurgy; PM steels; microstructure powder metallurgy; PM steels; microstructure

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Özdemirler, D.; Gündüz, S.; Erden, M.A. Influence of NbC Addition on the Sintering Behaviour of Medium Carbon PM Steels. Metals 2017, 7, 121.

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