Hot Deformation Behavior of F6NM Stainless Steel
摘要
The hot deformation behavior of F6 NM stainless steel was investigated by hot compression test in a Gleeble-1500Dthermal-mechanical simulator.The flow strain-stress curves were obtained and the corresponding metallographic observation of this steel under different deformation conditions was also carried out.This steel exhibited dynamic recrystallization(DRX)in the temperature range of 1 273-1 473 Kand the strain rate range of 0.01-0.1s-1.The activation energy for hot deformation was determined to be 457.91kJ/mol,and the hot deformation equations were also established.The flow instability zone was determined and could be divided into two regions.The first one was located in the temperature range of 1 173-1 348 Kand the strain rate range of 0.056-10s-1,while the second one is in the temperature range of 1 398-1 448 Kand the strain rate range of 1.25-10s-1.In the end,the optimum conditions for hot working were provided.