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.
作者
汲霖
韩彬彬
任东
李一鸣
金自力
任慧平
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)
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)
作者简介
汲霖(1994-),男(汉),河北省,本科。研究方向:钢铁材料组织性能控制;通信作者:李一鸣,副教授。E-mail:liyiming79@sina.com
