In-situ observation of inclusion agglomeration behaviors and its correlation to clogging of nozzle in low-carbon steels with different amounts of Ti and Al addition  

作　　者：Yong-bo Yuan Wang-zhong Mu Chen Tian Xiao-ming Liu Tie Liu Qiang Wang 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),School of Metallurgy,Northeastern University,Shenyang,110819,Liaoning,China [2]Department of Materials Science and Engineering,KTH Royal Institute of Technology,Stockholm,10044,Sweden

出　　处：《Journal of Iron and Steel Research International》2025年第2期388-398,共11页钢铁研究学报(英文版)

基　　金：National Natural Science Foundation of China(Nos.U21A20116,U21A20117 and 52304347);National Natural Science Foundation of Liaoning(Nos.2023-MSBA-135 and 2023-BSBA-107);the Fundamental Research Funds for the Central Universities(Nos.N2409006 and N2409008)are acknowledged to support this work;Swedish Foundation for International Cooperation in Research and Higher Education(STINT,Project No.IB2022-9228)is acknowledged by W.Mu to support his visit between KTH(Sweden)and NEU(China).

摘　　要：Understanding the motion behaviors of non-metallic inclusions in the liquid metal is important for clean steel production.High-temperature confocal laser scanning microscopy is applied to investigate the effect of different Ti and Al contents on the agglomeration behavior of non-metallic inclusions in low carbon steels.Furthermore,the agglomeration mechanism of inclusions was investigated through quantitative analysis of in-situ observation experiments and a modified Kralchevsky-Paunov model.The obtained results indicate that Al_(2)O_(3)is the main type inclusion in the low-alloys steels with both Al and Ti addition.This type of inclusion is more likely to absorb surrounding small-size inclusion particles,leading to a further growth for the cluster formation and contributing to a serious engineering problem,nozzle clogging.Besides,TiO_(x)is the main type inclusion in the molten steel with only Ti addition,and this type of inclusion is less likely to agglomerate and the individual inclusion particles show a‘free’motion with the fluid of molten steel.The difference between these two types of inclusions is due to the difference in attractive force and action distance at the meniscus created by the inclusion/steel/Ar multiple interfaces and influenced by the physical parameters,e.g.,contact angle and interface energy between inclusion and steel,and surface tension of the melt.

关 键 词：INCLUSION AGGLOMERATION ALLOYING Nozzle clogging High-temperature confocal laser scanning microscopy 

分 类 号：TG1[金属学及工艺—金属学]