Simulation analysis on transfer law of deformation in thickness direction of ultra-heavy plate
GAO Zhi-yu1, FAN Xian-jin1, DOU Chun-yue1, ZHANG Xu1, PAN Tao2
(1. College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123099, Liaoning, China;
2. Department of Engineering Steels, Central Iron and Steel Research Institute, Beijing 100081, China)
Abstract:Based on Gleeble hot compression test and finite element method,the law of the deformation transferring to the center in the thickness direction of a HSLA ultra-heavy plate was simulated. For the first time,the rolling specification mechanism of the high temperature,low speed and large reduction in the production of the heavy plate rolling was revealed quantitatively from the view of the finite element method. The material constitutive model used in the rolling process simulation is established by the Gleeble thermal compression test results combined with the Arrhenius equation. The effect of the process parameters,rolling speed,reduction,temperature and thickness of the slab on the strain distribution in the thickness direction was studied. The results show that when the rolling speed is less than 1 m/s(average strain rate less than 0.33 s-1),it is beneficial to transfer the deformation to the core of the plate and weaken the section effect. The larger the reduction,the greater the equivalent strain,and the location of the maximum equivalent strain in the direction of thickness is offset to the center. The effect of the rolling temperature on the distribution of the equivalent strain is not significant,but the high temperature rolling can reduce the load of the rolling mill. The thicker the slab is,the more significant the inhomogeneity of the deformation distribution is. When the slab thickness is 500 mm,the difference between maximum and minimum equivalent strain of the section reaches 0.2. In the production,it is recommended that the ultra-heavy plate should be rolled at a high temperature and a low speed and a large reduction under the equipment allows.
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GAO Zhi-yu1, FAN Xian-jin1, DOU Chun-yue1, ZHANG Xu1, PAN Tao2. Simulation analysis on transfer law of deformation in thickness direction of ultra-heavy plate. Iron and Steel, 2019, 54(4): 49-54,62.
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