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NbC、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.
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