Abstract: Based on established finite element model with rolling parameters including roller diameter I 160 mm, rolling speed 1 000 ~ 3 000 mm/s, slab size (mm) 150 X 1 550 x 2 520, the simulated calculation on folding of medium and heavy plate of steel Q235 has been carried out by using finite element software ABAQUS/Explicit and effect of rolling speed, temperature difference of rolling stock (30 ~ 70 ℃ ) , reduction of rolling stock (12-22 mm) on flatting amount of head of rolling stock is analyzed. It is obtained that with increasing temperature difference, rolling speed and reduction of stock the flatting amount of head of rolling stock increases and the folding defect shall be occurred in following rolling process, in order to decrease folding occurrence the larger temperature difference between top and bottom surface of stock should be avoided ,and as the temperature difference is larger it is available to roll by using small reduction and low rolling speed.

Key words: Medium and Heavy Plate, Folding, Bending Down, Flatting, Finite Element Simulation

摘要： 采用有限元软件ABQUS/Explicit根据轧辊直径1160 mm、轧制速度1 000～3 000 mm/s和坯料规格(mm)150×1 550×2 520等轧制参数建立的有限元模型对Q235钢中厚板折叠进行了模拟计算;分析了轧制速度、轧件温差(30～70℃)和压下量(12～22 mm)对轧制头部压扁量的影响。得出随温差、轧制速度、压下量增大,轧件头部压扁量增大,在后续的轧制过程会产生折叠缺陷。为减少折叠发生,应避免上下表面出现较大温差;当温差较大时应采用小压下量低速轧制。

关键词: 中厚板, 折叠, 下扣, 压扁, 有限元模拟