Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels
Abstract
The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increas...es the strength level, while CVN20 impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.
Keywords:
V-microalloyed steels / medium-carbon steels / bainite / acicular ferriteSource:
THERMEC 2009, PTS 1-4, 2010, 638-642, 3459-Publisher:
- Trans Tech Publications Ltd, Durnten-Zurich
DOI: 10.4028/www.scientific.net/MSF.638-642.3459
ISBN: 978-087849294-7
WoS: 000281043801238
Scopus: 2-s2.0-75849158712
Institution/Community
Tehnološko-metalurški fakultetTY - CONF AU - Radović, Nenad AU - Koprivica, Ankica AU - Glišić, Dragomir AU - Fadel, Abdunnaser AU - Drobnjak, Đorđe PY - 2010 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1635 AB - The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN20 impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite. PB - Trans Tech Publications Ltd, Durnten-Zurich C3 - THERMEC 2009, PTS 1-4 T1 - Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels SP - 3459 VL - 638-642 DO - 10.4028/www.scientific.net/MSF.638-642.3459 ER -
@conference{ author = "Radović, Nenad and Koprivica, Ankica and Glišić, Dragomir and Fadel, Abdunnaser and Drobnjak, Đorđe", year = "2010", abstract = "The influence of vanadium and nitrogen on microstructure and mechanical properties of medium-carbon steels has been studied by means of metallography and mechanical testing. Vanadium addition to the low nitrogen steel suppresses the formation of ferrite-pearlite following the low reheating temperatures and microstructure consists of bainitic sheaves. Increasing nitrogen at the same vanadium level promotes the acicular ferrite formation. For high reheating temperatures, dominantly acicular ferrite structure in both the low nitrogen and the high nitrogen vanadium steels is obtained. The results suggest that vanadium in solid solution promotes the formation of bainite, whereas the effect of nitrogen is related to the precipitation of VN particles in austenite with high potency for intragranular nucleation of acicular ferrite and to the precipitation of V(C,N) particles in ferrite with high potency for precipitation strengthening. Addition of both vanadium and nitrogen considerably increases the strength level, while CVN20 impact energy increases on changing the microstructure from bainitic ferrite to the fine ferrite-pearlite and acicular ferrite.", publisher = "Trans Tech Publications Ltd, Durnten-Zurich", journal = "THERMEC 2009, PTS 1-4", title = "Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels", pages = "3459", volume = "638-642", doi = "10.4028/www.scientific.net/MSF.638-642.3459" }
Radović, N., Koprivica, A., Glišić, D., Fadel, A.,& Drobnjak, Đ.. (2010). Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in THERMEC 2009, PTS 1-4 Trans Tech Publications Ltd, Durnten-Zurich., 638-642, 3459. https://doi.org/10.4028/www.scientific.net/MSF.638-642.3459
Radović N, Koprivica A, Glišić D, Fadel A, Drobnjak Đ. Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels. in THERMEC 2009, PTS 1-4. 2010;638-642:3459. doi:10.4028/www.scientific.net/MSF.638-642.3459 .
Radović, Nenad, Koprivica, Ankica, Glišić, Dragomir, Fadel, Abdunnaser, Drobnjak, Đorđe, "Influence of V and N on Transformation Behavior and Mechanical Properties of Medium Carbon Forging Steels" in THERMEC 2009, PTS 1-4, 638-642 (2010):3459, https://doi.org/10.4028/www.scientific.net/MSF.638-642.3459 . .