Effect of gradient temperature rolling on microstructure of initial pass of ultra-heavy plates

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Xu, Bo^1 ; Fu, Hongyuan^1 ; Zhang, Xin^2 ; Bian, Shouyuan^2 ; Yan, Ling^3 ; Li, Shengli^2

College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, Hebei

063210, China^1

Key Laboratory of Metallurgical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning

114051, China^2

State Key Laboratory of Metal Materials for Marine Equipment and Their Application, Anshan Iron and Steel Group Corporation, Anshan

114021, China^3

关键词: Average grain size;    Finite element software;    Recrystallized grain sizes;    Rolling models;    Rolling process;    Static recrystallization;    Surface temperatures;    Uniform temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/2/022012/pdf
DOI  :  10.1088/1755-1315/233/2/022012

来源: IOP

【 摘 要 】

In this paper, the gradient temperature rolling (GTR) method is used to establish the rolling model of the first two passes by using the deform-3D finite element software. The variation of temperature field, stress field, static recrystallization and average grain size of ultra-heavy plate slab under different conditions is systematically studied. Test result shows that the water cooling between the passes can form a temperature gradient layer (about 30mm) of a certain thickness on the surface of the rolled blank, the deformation of the core can be effectively improved during the rolling process, the static recrystallized grain size and average grain size of the surface of the rolled part are more obvious than the uniform temperature rolling; in addition, since the surface temperature of the water-cooled product is low, the amount of deformation is small, and metastable dynamic recrystallization does not occur.