摘要
为适应绿色高效轧制生产,提出了双机架可逆式开坯轧制工艺;分析和对比了双机架独立可逆式、串列可逆式两种布置型式的优缺点。针对优特钢开坯生产灵活性要求高的特点,选用双机架独立可逆式布置更具优势。在此基础上,分析和探讨了平-平组合双机架独立可逆式开坯轧制工艺的配辊模式及轧制道次排布,计算并校核了典型钢种各道次温度及轧制力能,同时采用ABAQUS有限元软件对开坯轧制各道次的变形渗透性进行了模拟计算。结果表明:BD1、BD2轧机采用相同配辊方式,2架轧机机型相同,轧机备件统一,当轧槽重车时,2架轧机辊系交换使用;也可2架轧机二选一使用,另外1架检修维护,生产灵活性好。针对典型钢种的生产,开坯轧制钢坯整体温降在100℃以内,终轧温度可保持在950℃以上,满足相应钢种热加工温度窗口控制及其后续工序处理要求,并且机架间输送温降可控;此外,主电机参数及过载能力可满足典型钢种轧制力能参数的要求。经过前序2道次累积变形后实施较大压下量,钢坯芯部变形渗透性良好,对于尺寸为300 mm×390 mm的坯料,通过累计压缩比大于5的开坯轧制,可以获得断面变形均匀性良好的150 mm×150 mm轧制小方坯。最后,介绍了优特钢双机架可逆式开坯轧制的典型工艺布置,并对其在优特钢线棒材基地的应用前景进行了展望。
In order to satisfy the green and efficient rolling production,the double stands reversible breakdown rolling process was proposed,two layouts of double stands individual and tandem reversible breakdown rolling were analyzed and compared.In view of the high production flexibility of breakdown rolling for special-quality steel,it will be more advantageous to choose the double stands individual reversible layout.Based on the above,the roller grooving configuration mode and rolling pass arrangement for H-H double stands individual reversible breakdown rolling process were analyzed and discussed,the rolling temperature and parameters of typical steel grades in various pass were calculated and checked.Meanwhile,the deformation permeability in various pass of breakdown rolling was simulated and calculated by FEM software-ABAQUS.The results indicated that the spare parts of breakdown rolling mills could be unified if BD1 and BD2 rolling mills were selected by the same roller grooving configuration and the same mill type.Meanwhile,it was provided with good production flexibility that the roller systems of two rolling mill stands were exchanged by each other when the roller grooves should be turned again,or two rolling mill stands were chosen one to use and the other to maintain.For the production of typical steel grades,the overall temperature drop of the breakdownrolled billet could be controlled within 100℃and the final rolling temperature could be maintained above 950℃,so that the hot processing temperature window control of corresponding steel grades and their treatment requirements of subsequent procedures could be satisfied,and also the temperature drop of delivering between two mill stands would be controllable.Moreover,the parameters of main motors and their overload capacity could be satisfied with the requirements of rolling parameters for typical steel grades.The good deformation permeability at the core of the billet could be obtained by applying larger reduction after the accumulated deformation by previous two passes.For the billet with the dimension of 300 mm×390 mm,the fine deformation uniformity for the small rolled billet with the cross section of 150 mm×150 mm could be achieved by breakdown rolling of more than 5 accumulated reduction ratio.Finally,the typical process layout of double stands reversible breakdown rolling for special-quality steel was introduced,and the application prospect for the breakdown rolling process mentioned above was forecasted in the base of wire rod and straight bar for special-quality steel.
作者
钱宝华
马靳江
周民
QIAN Baohua;MA Jinjiang;ZHOU Min(Rolling and Equipment Business Department,CISDI Engineering Co.,Ltd.,Chongqing 401122,China;Metal Materials Research Institute,CISDI Research and Development Co.,Ltd.,Chongqing 401122,China)
出处
《轧钢》
北大核心
2025年第4期91-96,共6页
Steel Rolling
基金
中国五矿科创基金项目(90150879)。
关键词
双机架开坯机
独立可逆式布置
串列可逆式布置
轧制工艺
变形渗透性
工艺布置
double stands breakdown rolling mill
individual reversible layout
tandem reversible layout
rolling process
deformation permeability
process layout
