基于N含量调控的Ti微合金钢凝固过程中TiN析出行为研究  

Study on Precipitation Behavior of TiN Particles during Solidification Process of Ti-microalloyed Steels Based on Control of N Content

作　　者：陈瑞洋 裘欣 丁汉林 王子健 项重辰 CHEN Ruiyang;QIU Xin;DING Hanlin;WANG Zijian;XIANG Chongchen(School of Iron and Steel,Soochow University,Suzhou 215137,China;School of Optical and Electronic Information,Suzhou City University,Suzhou 215104,China)

机构地区：[1]苏州大学沙钢钢铁学院,苏州215137 [2]苏州城市学院光学与电子信息学院,苏州215104

出　　处：《材料研究学报》2024年第12期911-921,共11页Chinese Journal of Materials Research

基　　金：国家自然科学基金(52174367)。

摘　　要：通过实验观察和理论分析,研究了不同N含量Ti微合金钢凝固过程中TiN的析出行为。结果表明:降低N含量,可减少液相析出的粗大TiN夹杂的数量、体积分数并改变其形貌,同时也降低了固相析出TiN粒子的形核驱动力、粒子尺寸及体积分数。对于Ti元素含量一定的Ti微合金钢,调整N含量可有效调控钢中TiN夹杂和TiN粒子的形貌、大小和体积分数。The precipitation behavior of TiN particles during the solidification process of Ti-microalloyed steels with varying N contents was investigated by experimental observations and theoretical analysis.The results indicate that reducing the N content leads to decrease in the number of coarse TiN inclusions precipitated from the liquid phase and changes in the morphology of TiN inclusions,as well as alterations in the driving force for the precipitation and the size of TiN particles precipitated from the solid phase during solidification.Simultaneously,the decrease in N content contributes to the decrease of the volume fraction of TiN particles precipitated from both the liquid and solid phase.It is concluded that the morphology,size and volume fraction of TiN inclusions and precipitated TiN particles within the steel may be controlled by adjusting the N content of Ti-microalloyed steels with a set Ti content.

关 键 词：金属材料 TI微合金钢 TiN粒子 凝固偏聚 析出行为 

分 类 号：TG142.1-3[一般工业技术—材料科学与工程]