2205双相不锈钢变厚度轧制过程仿真分析

Simulation on Variable Thickness Rolling Process of 2205 Duplex Stainless Steel

针对不锈钢在轧制过程中易出现边裂,影响产品质量问题,基于变厚度轧制及塑性变形理论,结合Gleeble-3800热压缩模拟实验数据,构建2205双相不锈钢的热变形本构方程及不同轧制区域的轧制力学模型.基于变厚度交叉轧制工艺实现板带边部和中部区域的不同压下率控制,采用DEFORM软件对轧制过程进行模拟仿真,并对比分析变厚度交叉轧制与普通平轧的边部损伤情况以及不同厚度区域的金属流动规律.仿真结果表明,变厚度交叉轧制的边部损伤因子相对于普通平轧减小了22%,同时通过改变边部变厚度曲线能够改善边部损伤问题,有效提高不锈钢板带成材率及产品质量.

The edge cracks in stainless steels during variable thickness rolling(VTR)process greatly affect the product quality.Based on the VTR and plastic deformation theory,the hot-deformation constitutive equation of 2205 duplex stainless steel and mechanical model of different rolling regions to solve the edge crack problem are built,combining with experimental data from Gleeble-3800 thermal simulation.In the cross VTR process,different reduction rates in the edge and middle regions of the strip can be controlled.Using DEFORM software to simulate the rolling process,the edge damages from the cross VTR and ordinary rolling are compared and the metal flows in different thickness are analyzed.The results show that the factor of edge damage in the cross VRT process is reduced by 22%than that in ordinary one,and changing the curve of edge variable thickness can effectively solve the edge damage problem,so as to improve the product quantity and quality of stainless steel plate and strip.