Texture evolution of 440 MPa grade Nb-bearing high strength IF steel during rolling and annealing process |
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Authors: | Email author" target="_blank">Yinli?ChenEmail author Lan?Su Aimin?Zhao Yaobing?Li Benhai?Li Aimin?Xiong |
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Affiliation: | CHEN Yinli1,SU Lan1,ZHAO Aimin1,LI Yaobing1,LI Benhai2,XIONG Aimin2 (1.Engineering Research Institute,University of Science and Technology Beijing,Beijing 100083,China,2.Shougang Research Institute of Technology,Beijing 100041,China) |
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Abstract: | 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. |
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Keywords: | textures recrystallization high strength IF steel |
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