Texture Evolution of 440 MPa Grade Nb-bearing High Strength IF Steel during Rolling and Annealing Process

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 26; no. 6; pp. 1157 - 1161
• Main Authors: Chen, Yinli, Su, Lan, Zhao, Aimin, Li, Yaobing, Li, Benhai, Xiong, Aimin
• Format: Journal Article
• Language: English
• Published: Heidelberg Wuhan University of Technology 01.12.2011; Springer Nature B.V
• Subjects: Annealing; Chemistry and Materials Science; Cold rolling; Evolution; High strength; Hot rolling; Materials Science; MPa; Niobium; Surface layer; Texture; 中和; 含铌; 演变; 织构; 轧制过程; 退火工艺; 高强度IF钢; high strength IF steel; textures; recrystallization
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-011-0381-3

The texture evolution from rolling process to annealing process of 440 MPa grade Nb-bearing high strength IF steel （IF-HSS） was studied. Moreover, the texture of different section in thickness direction of steel sheet after annealing was investigated. Macro-texture measurements using XRD shows that hot rolling texture in Nb-bearing IF-HSS includes a weak γ-fiber and α-fiber, of which main texture components are {001}〈110〉,{111}〈110〉 and {111}〈112〉. It is worthy of note that the γ-fiber skeleton line formed after hot rolling. During cold rolling, the absolute maximum shifts to {111}〈112〉 along the γ-fiber and the maximum along the α-fiber shifts to {112} 〈110〉. During recrystallization annealing process, the weaker α-fiber and stronger γ-fiber cold rolling texture transformed to a very strong γ-fiber annealing texture. After annealing the main components from surface to mid-section along thickness display the same character for both α-fiber and γ-fiber, while textures intensity at 1/4 section is higher than that of surface and mid-section.