高强IF钢中的FeTiP析出行为  

Precipitation behavior of FeTiP in high strength IF steel

作　　者：汲霖 韩彬彬 任东 李一鸣[1] 金自力[1] 任慧平[1] JI Lin;HAN Binbin;REN Dong;LI Yiming;JIN Zili;REN Huiping(Key Laboratory of advanced Metals and Materials of Inner Mongolia,Inner Mongolia University of Science and Technology,Baotou 014010,China;HBIS Laoting Steel Co.,Ltd.,Tangshan 063000,China;Shandong Steel GroupRizhao City Co.Ltd.,Iron and Steel Research Institute,Rizhao 276800,China)

机构地区：[1]内蒙古自治区新金属材料重点实验室,内蒙古科技大学,内蒙古包头014010 [2]河钢乐亭钢铁有限公司,河北唐山063000 [3]山东钢铁集团日照有限公司钢铁研究院,山东日照276800

出　　处：《中国体视学与图像分析》2020年第2期150-156,共7页Chinese Journal of Stereology and Image Analysis

基　　金：内蒙古自治区科技重大专项课题(No.0902061701);内蒙古自治区科技计划项目(No.201803005)

摘　　要：利用扫描电镜和透射电镜对Nb、Ti复合含P高强IF钢在锻坯、热轧、卷取和罩式退火过程中FeTiP相的析出行为进行了观察。发现热轧和650℃以下卷取后FeTiP相难以析出,但在720℃卷取和680℃罩式退火后析出明显。FeTiP相倾向于在晶界处出现。观察同时发现新相依附已形成相的匹配良好界面上形核,形成多个FeTiP析出颗粒连续依附形核、生长的粗大析出。对于罩式退火生产条件,降低晶界P偏聚,优化退火工艺抑制FeTiP相的依附、团聚发展至关重要。The precipitation behaviors of FeTiP phase in an Nb-Ti composite high-strength IF steel during forging,hot rolling,coiling and batch annealing were observed by SEM and TEM.Precipitation of FeTiP was not observed after hot rolling and coiling below 650℃,but it was obvious after coiling at 720℃and batch annealing at 680℃.It was found that FeTiP phases tended to precipitate at grain boundaries.The observation also found that the new phase adhered to the nucleation on the well-matched interface of the formed phase,and formed multiple FeTiP precipitated particles that continuously adhered to the nucleation and grown coarse precipitations.It is important to restrict the segregation of P in the grain boundary and optimize the annealing process to debilitate the agglomerating nucleation of FeTiP during batch annealing.

关 键 词：无间隙原子钢 FeTiP 析出相 退火 

分 类 号：TG142.1[一般工业技术—材料科学与工程]