Review on niobium application in microalloyed steel  

作　　者：Lu-yan Sun Xiang Liu Xi Xu Shu-wei Lei Hui-gai Li Qi-jie Zhai 

机构地区：[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

出　　处：《Journal of Iron and Steel Research International》2022年第10期1513-1525,共13页

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.

关 键 词：NIOBIUM PRECIPITATE MICROALLOYING High-strength low-alloy steel 

分 类 号：TG142[一般工业技术—材料科学与工程]