论文部分内容阅读
选择新型细晶高强IF钢为研究对象,在实验室进行了热轧、冷轧及罩式退火实验。利用光学显微镜、透射电镜复型和电子背散射衍射(EBSD)技术,研究了不同退火时间对细晶高强IF钢显微组织、析出相及织构的影响。结果表明,选择合适的退火时间,晶粒变得细小、均匀。细晶高强IF钢在退火过程中析出大量的Nb C、Nb(CN)相;随退火时间延长,钢中析出相粒子偏聚长大。为了获得较强的有利织构及优异的冲压性能,实验钢退火时间应选定在5 min。
Select the new type of fine-grained high-strength IF steel for the study, conducted in the laboratory hot-rolled, cold-rolled and hood annealing experiments. The effects of different annealing time on microstructure, precipitated phase and texture of fine-grained IF steel were studied by optical microscopy, transmission electron microscopy and electron backscatter diffraction (EBSD). The results show that, by choosing the appropriate annealing time, the grains become fine and uniform. During the annealing process, a large amount of Nb C and Nb (CN) phases were precipitated in the fine-grained high-strength IF steel. The segregation and phase growth of phase precipitated in the steel increased with annealing time. In order to obtain a strong favorable texture and excellent stamping performance, the experimental steel annealing time should be selected in 5 min.