1 State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy and School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 2 Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 3 Ansteel Group Iron and Steel Research Institute, Ansteel, Anshan, 114001, Liaoning, China
Review on niobium application in microalloyed steel
1 State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy and School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 2 Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 3 Ansteel Group Iron and Steel Research Institute, Ansteel, Anshan, 114001, Liaoning, China
摘要 With the rapid development of high-strength low-alloy (HSLA) steel, Nb as an important microalloying element has received more and more attention in recent years. The application and behavior of Nb in HSLA steel, including microstructures optimization, refining grain size, and precipitation behavior of Nb-containing phases, were reviewed. Nb could play an important role in following manners: (1) Nb-containing phases promote ferrite formation, and Nb solute promotes bainite formation. (2) Nb solute atoms and Nb-containing phases can inhibit the growth of austenite grains and austenite recrystallization. (3) Nb(C,N) that precipitates in ferrite/bainite can provide more significant strengthening contribution (more than 300 MPa) than that in austenite (about 100 MPa). Some reasonable suggestions for the production of Nb-bearing HSLA steel with excellent mechanical properties were put forward.
Abstract：With the rapid development of high-strength low-alloy (HSLA) steel, Nb as an important microalloying element has received more and more attention in recent years. The application and behavior of Nb in HSLA steel, including microstructures optimization, refining grain size, and precipitation behavior of Nb-containing phases, were reviewed. Nb could play an important role in following manners: (1) Nb-containing phases promote ferrite formation, and Nb solute promotes bainite formation. (2) Nb solute atoms and Nb-containing phases can inhibit the growth of austenite grains and austenite recrystallization. (3) Nb(C,N) that precipitates in ferrite/bainite can provide more significant strengthening contribution (more than 300 MPa) than that in austenite (about 100 MPa). Some reasonable suggestions for the production of Nb-bearing HSLA steel with excellent mechanical properties were put forward.
Lu-yan Sun,Xiang Liu,Xi Xu, et al. Review on niobium application in microalloyed steel[J]. Journal of Iron and Steel Research International, 2022, 29(10): 1513-1525.
2022, Vol. 29 
