FeCMnAlSi中锰钢临界退火奥氏体生长模拟  

Simulation of austenite growth in intercritical annealing of FeCMnAISi medium manganese steel

作　　者：贾庚霖 李岩[1,2] 定巍 JIA Genglin;LI Yan;DING Wei(Materials and Metallurgy College,Inner Mongolia University of Science and Technology,Baotou 014010,Nei Mongol,China;Inner Mongolia Autonomous Region Bayan Obo Mine Polymetallic Resources Comprehensive Utilization Key Laboratory,Inner Mongolia University of Science and Technology,Baotou014010,Nei Mongol,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010

出　　处：《钢铁研究学报》2023年第9期1131-1141,共11页Journal of Iron and Steel Research

基　　金：内蒙古科技大学基本科研业务费专项资金资助项目;白云鄂博共伴生矿资源高效综合利用省部共建协同创新中心资金资助项目。

摘　　要：作为第3代先进高强度钢中主要发展的材料之一,中锰钢由于具有高强度和大伸长率得到广泛研究。尽管进行了不少的研究工作,但大多仍采用依靠经验反复实验的方法。为改善这一情况,将渗碳体添加到模型中去,通过DICTRA软件对Fe-C-Mn-Al-Si五元体系中锰钢临界退火过程中奥氏体生长的动力学建模,讨论了奥氏体生长的3个过程及其中置换元素的配分所带来的影响;经场发射扫描电子显微镜(SEM)和X射线衍射(XRD)分析,观察热轧钢亚温临界退火后的微观显微组织呈现薄膜状残余奥氏体。将实验数据与模拟情况相结合的结果表明,远端模型更适用于实际情况下合金的研究。As one of the main developed materials in the third-generation advanced high strength steel,medium manganese steel has been widely studied due to its high strength and large elongation.Although a lot of research work has been done,most of them still use the method of repeated experiments based on experience.In order to improve this situation,cementite was added to the model in the work.The dynamic model of austenite growth in the intercritical annealing process of manganese steel in Fe-C-Mn-Al-Si five-element system was established by DICTRA software.The three processes of austenite growth and the influence of the distribution of substitution elements were discussed.By field emission scanning electron microscopy(SEM)and X-ray diffraction(XRD)analysis,the microstructure of hot rolled steel after subcritical annealing was observed to be film-like retained austenite.The results of the combination of experimental data and simulation show that the far-end model is more suitable for the study of alloys under actual conditions.

关 键 词：中锰钢 奥氏体 模拟 临界退火 生长动力学 

分 类 号：TG142.3[一般工业技术—材料科学与工程]