基于 DEFORM-3D 的哈氏合金基带多道次轧制仿真研究

The multi-pass rough rolling process of Hastelloy substrate was simulated by using the DEFORM-3D simulation software. Relying on the calculation of flow stress, the material property model and simulation model were established, and the accuracy of the model was verified by the rough rolling experiments of the first several passes. The effects of the reduction rate, roll shape and friction factor on the rolling process were investigated by simulation experiments. The results show that with the increase of pass reduction rate, the average rolling force increases. The non-uniformity of substrate strain caused by the rolling process with pass reduction rate of 30% is an important cause of surface cracks. The cracks generated on the surface of the substrate in subsequent rolling experiments are successfully predicted. In actual production, the reduction rate of 20% or less should be selected as much as possible. In this application condition, the newly designed concave roller process can effectively reduce rolling force, reduce equipment requirements, and improve rolling safety. In part of experiment process, concave rollers were used to effectively delay the occurrence of side cracks until the eighth pass. Good lubrication conditions can reduce friction, simulation results show that the smaller the friction factor, the better the uniformity of the substrate rolling. However, it increases the process time and the difficulty of material feeding. The research results optimize the actual rolling process, and reduce defects such as surface and edge cracks of the substrate during rolling process.