Numerical study of creep effect on purging plug performance under cyclic service  

作　　者：Fang-guan Tan Sheng-li Jin Zhu He Xiong Liang Ya-wei Li Jing Li 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China [2]National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China [3]Chair of Ceramics,Montanuniversitaet Leoben,8700 Leoben,Austria [4]The Key Laboratory of Chemical Metallurgy Engineering of Liaoning Province and School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China

出　　处：《Journal of Iron and Steel Research International》2022年第7期1119-1128,共10页

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant Nos.51974211,12072245,and 51834002);the Special Project of Central Government for Local Science and Technology Development of Hubei Province(Grant Nos.2019ZYYD003 and 2019ZYYD076).

摘　　要：The service life of the purging plug is one of the fundamental factors that determine the downtime and usage efficiency of the whole ladle.The creep behaviour of the purging plug was thus investigated to identify the possible failure mechanism.At first,the creep parameters of the Norton–Bailey strain hardening rule were inversely identified via the results of the creep test.Then,the thermal-solid coupling model approach was employed to predict the creep behaviour of the purging plug,in which the Norton–Bailey strain hardening rule was applied.The numerical results show that the temperature of the purging plug presents a cyclic trend after the first service period since the preheating temperature is lower than the temperature of molten steel.Furthermore,the distribution of the creep strain intensity in a layered form could also contribute to a gradual spalling of the purging plug end in service.Besides,the creep strain concentration around the slit can be responsible for the clogging of the purging plug.

关 键 词：Strain hardening Creep test Creep deformation Purging plug Castable corundum 

分 类 号：TG14[一般工业技术—材料科学与工程]