Agglomeration behaviors of various oxide inclusions in Fe-Al-Ti-O melts  

作　　者：Ye-guang Wang Ji Zhou Cheng-jun Liu Zhi-gang Liang 

机构地区：[1]Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education),Northeastern University,Shenyang,110819,Liaoning,China [2]National Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou,014080,Inner Mongolia,China

出　　处：《Journal of Iron and Steel Research International》2025年第2期399-408,共10页钢铁研究学报(英文版)

基　　金：support of Postdoctoral Fellowship Program of CPSF(GZC20230393);Natural Science Foundation of Liaoning Province in China(2023-BSBA-112);Fundamental Research Funds for the Central Universities(N2425032).

摘　　要：The formation of large-sized inclusions cluster severely impacts the continuous casting process and product quality of titanium-containing steel.Thermodynamic calculations were initially conducted to predict the formation of various complex oxide inclusions,namely Al_(2)O_(3),TiO_(x)and Al-Ti-O.Based on that,laboratory-scale experiments were designed to prepare samples with a single type of inclusions.Then,the scanning electron microscope-energy dispersive spectrometer was used for quantitative characterization.Subsequently,the agglomeration behavior of inclusions in Fe-Al-Ti-O melt was observed in situ by high-temperature confocal laser scanning microscopy.Furthermore,a quantitative analysis of the agglomeration characteristics of the various inclusions was conducted based on the attractive forces in accordance with Newton's second law and the capillary forces as described by the Kralchevsky-Paunov model.The results indicate that the size of Al_(2)O_(3)inclusions is larger than that of TiO_(x)and Al-Ti-O,but the number density of TiO_(x)is the highest.Based on the in situ observation and the theoretical calculation,Al_(2)O_(3),TiO_(x)and Al-Ti-O inclusions can all agglomerate into large-sized clusters without segregation,but the agglomeration tendency of Al_(2)O_(3)and TiO_(x)is stronger than that of Al-Ti-O.The attractive force between Al_(2)O_(3)inclusions’pair is the largest,ranging from 2.26×10^(-15)to 6.12×10^(-14)N,followed by TiO_(x)(7.13×10^(-16)to 3.56×10^(-14)N)and Al-Ti-O(1.16×10^(-17)to 3.77×10^(-16)N).

关 键 词：Ti-containing steel INCLUSION AGGLOMERATION Thermodynamic calculation In situ observation 

分 类 号：TG1[金属学及工艺—金属学]