Effect of W addition on hot deformation and precipitation behaviors of 19Cr2Mo ferritic stainless steel
作者机构：State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 Liaoning China
出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)
年 卷 期：2019年第26卷第5期
页 面：425-434页
核心收录：
基 金：National Natural Science Foundation of China and Baowu Steel Group Co. Ltd.(Grant No. U1660205)
主 题：Ferritic stainless steel Tungsten Hot deformation behavior Microstructure evolution Precipitation Laves phase
摘 要：The hot deformation behavior of 19Cr2Mo and 19Cr2Mo1W ferritic stainless steels was studied by using uniaxial hot compression tests on a thermomechanical simulator. The hot deformation was carried out at temperature ranging from 800 to 1150℃ and strain rates from 0.01 to 10 s^-1. Microstructure change and precipitation behavior during hot deformation were investigated by optical microscopy, electron probe microanalysis and transmission electron microscopy. The effects of temperature and strain rate on deformation behavior were obtained by a classical equation in Zener-Hollomon parameter. Since W addition to 19Cr2Mo1W steel could refine the size of the precipitates to enhance the precipitation strengthening and also had the effect of solution strengthening, the dynamic recrystallization, dynamic recovery and grain growth of 19Cr2Mo1W ferritic stainless steel were inhibited to a certain extent. The precipitate size of 19Cr2Mo1W steel was finer than that of 19Cr2Mo steel under the same deformation condition, which is due to the fact that the atomic diffusion is suppressed by W addition. W addition increased the amount of Laves phase in 19Cr2Mo1W steel, and thus Laves phase in 19Cr2Mo1W steel could be formed at higher temperature than that in 19Cr2Mo steel.
维普期刊数据库