摘要
考虑到实际板带轧制过程中组织性能预测的精度缺陷,基于低合金钢轧制过程动态再结晶型的真实应力-应变数学模型及微观组织模型,通过VUMAT及USDFLD数据接口,依托于ABAQUS有限元软件,对软件材料子程序及其微观组织模型进行了二次开发研究,最后对Q345B板带的热轧制过程进行了模拟验证。研究结果表明:模型的预测精度较高,板带横截面处各部位的静态软化率和奥氏体晶粒直径差别较大,板带中心处的奥氏体晶粒分布比较均匀,板带侧面及表面奥氏体晶粒细化程度不大,要靠后续的精轧过程继续细化。
Considering precision defects of organization performance prediction in actual strip rolling process,based on real stress-strain mathematical model of the dynamic recrystallization model and microstructure model in rolling process of low alloy steel,and by VUMAT and USDFLD data interface,based on the finite element software ABAQUS,there is a secondary development research for material subroutine and its microstructure model. Finally,it is verification of simulation by Q345 B strip hot rolling process. The results show that the prediction precision is higher,and static softening rate and the austenitic grain diameter difference is bigger from each part of the plate with cross section. In strip center the austenitic grain size distribution is more uniform,and degree of grain refinement for austenitic grain is not big from strip profile and surface,so it is necessary to rely on the follow-up finishing process.
出处
《太原科技大学学报》
2015年第5期362-368,共7页
Journal of Taiyuan University of Science and Technology
基金
973计划前期研究专项(2012CB722801
山西省自然科学基金(20121060)
关键词
材料本构模型
ABAQUS二次开发
组织性能预测
轧制过程模拟
动态再结晶
material constitutive model
secondary development of ABAQUS
organization performance prediction
rolling process simulation
dynamic recrystallization
