摘要
在钢液的凝固过程中,钛化物析出可能作为γ-Fe、α-Fe固溶体的异质形核核心。采用二维点阵错配度理论,对TiN、TiC析出物与γ-Fe、α-Fe固溶体的异质形核有效性进行计算。结果表明:在(100)面,TiN、TiC与α-Fe固溶体的二维点阵错配度分别为6.33%和8.13%,TiN、TiC能成为α-Fe固溶体的异质形核核心,且TiN的形核有效性大于TiC;α-Fe在TiC上优先形核;TiN、TiC不易成为γ-Fe的形核点。TiN、TiC在(110)面、(111)面不易成为γ-Fe、α-Fe固溶体的异质形核核心。
During the solidification process of molten steel,the precipitation of titanium compounds may serve as the heterogeneous nucleation core of γ-Fe andα-Fe solid solutions.The two-dimensional lattice mismatch theory is used to calculate the heterogeneous nucleation effectiveness of TiN,TiC precipitates and γ-Fe,α-Fe solid solutions.The results show that on the(100)plane,the two-dimensional lattice mismatch degrees of TiN,TiC and α-Fe solid solution are 6.33%and 8.13%,respectively.TiN and TiC can become the heterogeneous nucleation cores ofα-Fe solid solution,and the nucleation efficiency of TiN is greater than that of TiC;α-Fe preferentially nucleates on TiC;TiN and TiC are not easy to become nucleation points of γ-Fe.TiN and TiC are not easy to become the heterogeneous nucleation cores of γ-Fe andα-Fe solid solutions on the(110)plane and(111)plane.
作者
陈璐
李长荣
翟勇强
王劼
李正嵩
刘占林
CHEN Lu;LI Changrong;ZHAI Yongqiang;WANG Jie;LI Zhengsong;LIU Zhanlin(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Guizhou Province Key Laboratory for Metallurgical Engineering and Process Energy Saving,Guiyang 550025,China;Shougang Shuicheng Iron and Steel(Group)Co.,Ltd.,Liupanshui 553000,China)
出处
《贵州大学学报（自然科学版）》
2021年第5期40-43,124,共5页
Journal of Guizhou University:Natural Sciences
基金
国家自然科学基金资助项目(52074095)。
关键词
钛化物
二维错配度
异质形核核心
有效性
titanide
two-dimensional mismatch
heterogeneous nucleation core
validity
