Abstract：Investigations were carried out to evaluate the influence of nitrogen on the microstructure evolution in 20MnSi steel bearing with niobium. Two steels with different nitrogen contents solution treated at 1 200 ℃ were rapidly cooled to their[Ac3]and then cooled to the room temperature at the cooling rates of 200 and 100 ℃/h， respectively. Observations were conducted by optical microscopy(OM)，scanning electron microscopy(SEM）and transmission electron microscopy(TEM). The results demonstrate that the acicular ferrite nucleated and grew at the carbon-poor areas which were caused by the Nb(C， N) precipitation at the high density dislocation region within the prior austenite grain. The enhancement of nitrogen was beneficial to inhibit the formation of the acicular ferrite and promote the formation of equaxied ferrite. Also， the fraction of degenerated pearlite was decreased and the pearlite nodules were in a fine and uniform distribution.
收稿日期: 2015-03-19
出版日期: 2015-10-29
引用本文:
曹 磊，杨忠民，陈 颖，王慧敏，赵晓丽. 氮对含铌20MnSi钢组织演变的影响[J]. 钢铁, 2015, 50(11): 75-80.
CAO Lei，YANG Zhong-min，CHEN Ying，WANG Hui-min，ZHAO Xiao-li. Effect of nitrogen on the microstructure evolution in 20MnSi steel bearing with niobium. Iron and Steel, 2015, 50(11): 75-80.
Liljas M, Nilsson J O. Development of commercial nitrogen-rich stainless steels. Materials science forum, Trans Tech Publ, 1999, 318:189-200.
[1]
Liljas M, Nilsson J O. Development of commercial nitrogen-rich stainless steels. Materials science forum, Trans Tech Publ, 1999, 318:189-200.
[2]
Yang C-f, Wang Q-l. Research, Development, and Production of V-N Microalloyed High Strength Rebars for Building in China[J]. Journal of Iron and Steel Research, International, 2008,15(2):81-86.
[2]
Yang C-f, Wang Q-l. Research, Development, and Production of V-N Microalloyed High Strength Rebars for Building in China[J]. Journal of Iron and Steel Research, International, 2008,15(2):81-86.
[3]
Vervynckt S, Thibaux P, Verbeken K. Effect of niobium on the microstructure and mechanical properties of hot rolled microalloyed steels after recrystallization-controlled rolling[J]. Metals and Materials International, 2012,18(1):37-46.
[3]
Vervynckt S, Thibaux P, Verbeken K. Effect of niobium on the microstructure and mechanical properties of hot rolled microalloyed steels after recrystallization-controlled rolling[J]. Metals and Materials International, 2012,18(1):37-46.
[4]
Klinkenberg C. Niobium in microalloyed structural and engineering steels. Materials science forum, Trans Tech Publ, 2007, 539: 4261-4266.
[4]
Klinkenberg C. Niobium in microalloyed structural and engineering steels. Materials science forum, Trans Tech Publ, 2007, 539: 4261-4266.
[5]
Subramanian S V, Rehman M K, Zurob H S, Shang C J. Recrystallization and Grain Coarsening Control in Processing High Niobium Microalloyed Line Pipe Steels. Materials Science Forum, Trans Tech Publ, 2013, 753:391-396.
[5]
Subramanian S V, Rehman M K, Zurob H S, Shang C J. Recrystallization and Grain Coarsening Control in Processing High Niobium Microalloyed Line Pipe Steels. Materials Science Forum, Trans Tech Publ, 2013, 753:391-396.
[6]
She Y, Zhang Z H, Ju J T, Jin B. Phase Transformation Behavior of Niobium Containing Microalloyed Steel with Predeformation and Continuous Cooling. Materials Science Forum, Trans Tech Publ, 2015, 804:.281-284.
[6]
She Y, Zhang Z H, Ju J T, Jin B. Phase Transformation Behavior of Niobium Containing Microalloyed Steel with Predeformation and Continuous Cooling. Materials Science Forum, Trans Tech Publ, 2015, 804:.281-284.
[7]
Klinkenberg C, Hulka K, Bleck W. Niobium carbide precipitation in microalloyed steel[J]. Steel research international, 2004,75(11):744-752.
[7]
Klinkenberg C, Hulka K, Bleck W. Niobium carbide precipitation in microalloyed steel[J]. Steel research international, 2004,75(11):744-752.
[8]
Lakshmanan V, Kirkaldy J. Solubility product for niobium carbide in austenite[J]. Metallurgical Transactions A, 1984,15(3):541-544.
[8]
Lakshmanan V, Kirkaldy J. Solubility product for niobium carbide in austenite[J]. Metallurgical Transactions A, 1984,15(3):541-544.
[9]
Hong S C, Lim S H, Hong H S, Lee K J, Shin D H, Lee K S. Effects of Nb on strain induced ferrite transformation in C–Mn steel[J]. Materials Science and Engineering: A, 2003,355(1–2):241-248.
[9]
Hong S C, Lim S H, Hong H S, Lee K J, Shin D H, Lee K S. Effects of Nb on strain induced ferrite transformation in C–Mn steel[J]. Materials Science and Engineering: A, 2003,355(1–2):241-248.
[10]
Radis R, Kozeschnik E. Numerical simulation of NbC precipitation in microalloyed steel[J]. Modelling and Simulation in Materials Science and Engineering, 2012,20(5):055010.
[10]
Radis R, Kozeschnik E. Numerical simulation of NbC precipitation in microalloyed steel[J]. Modelling and Simulation in Materials Science and Engineering, 2012,20(5):055010.
[11]
Campillo B, Flores O, Albarran J L, Juarez-Islas J, Perez R, Martinez L, Lopez D. Dissolution and coarsening of large niobium carbonitrides in a microalloyed steel[J]. Journal of materials science, 1992,27(5):1365-1368.
[11]
Campillo B, Flores O, Albarran J L, Juarez-Islas J, Perez R, Martinez L, Lopez D. Dissolution and coarsening of large niobium carbonitrides in a microalloyed steel[J]. Journal of materials science, 1992,27(5):1365-1368.
[12]
Campillo B, Albarran J, Estevez F, Lopez D, Martinez L. Precipitation of niobium nitrides in a high nitrogen HSLA steel[J]. Scripta metallurgica, 1989,23(8):1363-1368.
[12]
Campillo B, Albarran J, Estevez F, Lopez D, Martinez L. Precipitation of niobium nitrides in a high nitrogen HSLA steel[J]. Scripta metallurgica, 1989,23(8):1363-1368.
[13]
Albarran J, Campillo B, Estevez F, Martinez L. A study of the effect of nitrogen in two niobium microalloyed steels[J]. Scripta metallurgica, 1989,23(7):1099-1104.
[13]
Albarran J, Campillo B, Estevez F, Martinez L. A study of the effect of nitrogen in two niobium microalloyed steels[J]. Scripta metallurgica, 1989,23(7):1099-1104.
[14]
Shams N. Austenite grain coarsening in low–carbon manganese steels containing niobium and aluminium[J]. Materials Science and Technology, 1985,1(11):950-953.
[14]
Shams N. Austenite grain coarsening in low–carbon manganese steels containing niobium and aluminium[J]. Materials Science and Technology, 1985,1(11):950-953.
[15]
王厚昕. 钢中氮含量的控制及其应用于微合金化钢的研究[D]. 钢铁研究总院, 2006.
[15]
王厚昕. 钢中氮含量的控制及其应用于微合金化钢的研究[D]. 钢铁研究总院, 2006.
[16]
Sarma D S, Karasev A V, ouml, nsson P G. On the Role of Non-metallic Inclusions in the Nucleation of Acicular Ferrite in Steels[J]. ISIJ International, 2009,49(7):1063-1074.
[16]
Sarma D S, Karasev A V, ouml, nsson P G. On the Role of Non-metallic Inclusions in the Nucleation of Acicular Ferrite in Steels[J]. ISIJ International, 2009,49(7):1063-1074.
[17]
Babu S, Bhadeshia H. Mechanism of the transition from bainite to acicular ferrite[J]. Materials Transactions, JIM(Japan), 1991,32(8):679-688.
[17]
Babu S, Bhadeshia H. Mechanism of the transition from bainite to acicular ferrite[J]. Materials Transactions, JIM(Japan), 1991,32(8):679-688.
[18]
Burgmann F, Xie Y, Cairney J, Ringer S, Killmore C, Barbaro F, Williams J. The effect of niobium additions on ferrite formation in castrip steel. Mater. Forum, 2008. 32: 9-12.
[18]
Burgmann F, Xie Y, Cairney J, Ringer S, Killmore C, Barbaro F, Williams J. The effect of niobium additions on ferrite formation in castrip steel. Mater. Forum, 2008. 32: 9-12.
[19]
Chen Y, Zhang D, Liu Y, Li H, Xu D. Effect of dissolution and precipitation of Nb on the formation of acicular ferrite/bainite ferrite in low-carbon HSLA steels[J]. Materials Characterization, 2013,84(0):232-239.
[19]
Chen Y, Zhang D, Liu Y, Li H, Xu D. Effect of dissolution and precipitation of Nb on the formation of acicular ferrite/bainite ferrite in low-carbon HSLA steels[J]. Materials Characterization, 2013,84(0):232-239.
2015, Vol. 50 
