State Key Laboratory of Rolling and Automation;
Northeastern University;
Shenyang 110819;
Liaoning;
China;
Jiangsu Shagang Group Huaigang Special Steel Co.;
Ltd.;
Huaian 223002;
Jiangsu;
China;
School of Materials Science and Engineering;
Jiangsu University of Science and Technology;
Zhenjiang 212003;
Jiangsu;
China;
Institute of Research of Iron and Steel;
Shasteel;
Zhangjiagang 215625;
Jiangsu;
China;
Con; focal; laser; scanning; microscope; Nb-Ti; microalloying; High; carb; on; steel; Grain; growth; Nanoparticle; Grain; growth; model;