期刊
METALS
卷 7, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/met7090329
关键词
powder metallurgy; Nb-V microalloyed steels; microstructure; mechanical properties; tensile test; hardness
资金
- Scientific Research Projects Coordination Unit of Karabuk University (Karabuk, Turkey) [KBU-BAP-15/2-KP-058, KBU-BAP-17-DS-029]
In this work, the effect of the sintering temperature on the microstructure and mechanical properties of Nb-V added powder metallurgy (PM) steels was investigated. The microstructure and mechanical properties of the Nb-V added PM microalloyed steel were examined by optical microscopy, scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), optical emission spectrometer (OES), tensile and hardness tests. Results indicated that the optimal sintering temperature was 1350 degrees C and the addition of 0.1%, 0.15% or 0.2% of Nb-V increases the yield strength (YS), ultimate tensile strength (UTS) and hardness of the PM sintered steels. 0.2 wt % Nb-V added PM steel showed the highest values in yield strength (YS), ultimate tensile strength (UTS) and the highest hardness. Elongation also tends to improve with adding Nb-V content. In addition, Nb-V limited grain growth during austenitization.
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