厚规格钢板差厚轧制数值模拟与工艺研究

基于ABAQUS有限元软件，采用显式动力学算法对厚规格钢板三维常规轧制与差厚轧制热力耦合过程进行模拟仿真，获得差厚轧制变形区金属流动与应力、应变分布规律，研究常规轧制与差厚轧制在轧制过程中轧制力与轧制力矩的变化规律，分析差厚轧制对于轧制过程钢板咬入条件的改善.差厚轧制试验结果表明，制定合理的差厚轧制工艺，可以克服厚板坯轧制时的咬入限制，减小头部冲击造成的力矩峰值的影响，增加厚规格钢板心部变形的渗透，在一定程度上可以改善变形均匀性和组织均匀性.

Numerical Simulation and Processing Investigation on Differential Thickness Rolling of Thick Steel Plate

Based on ABAQUS finite element software， dynamic coupling process about three-dimensional conventional rolling and differential thickness rolling for thick steel plates were simulated by an explicit dynamic algorithm. The flow feature and the stress/strain distribution in the distorted region were obtained， the variation laws of rolling force and rolling moment during the process of conventional rolling and differential thickness rolling were studied and the improvement of the biting condition of steel plate during rolling process was analyzed. The results of the differential thickness rolling process show that the reasonable process for the differential rolling can overcome the bite limit of slab rolling， reduce the influence of peak torque caused by head impact and increase the penetration of the core deformation thickness of thick steel plate. Moreover， it can also improve the deformation uniformity and microstructure uniformity at a certain degree.