Interaction between microporous magnesia castable and 38CrMoAl steel  

作　　者：Cheng Yuan Yu Liu Guang-qiang Li Yong-shun Zou Ao Huang 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China [2]Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China [3]Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

出　　处：《Journal of Iron and Steel Research International》2023年第3期516-524,共9页

基　　金：The authors gratefully acknowledge the support from National Natural Science Foundation of China(No.U1860205).

摘　　要：The microporous magnesia refractory shows a promising application prospect as tundish lining due to excellent thermal insulation and slag resistance.The effect of interaction between microporous magnesia castable and 38CrMoAl steel containing 0.876 wt.%Al on the cleanliness of 38CrMoAl steel was studied and compared with that of fused magnesia castable.The results show that the micropores in the microporous magnesia castable can promote the formation of dense and continuous MgO-Al_(2)O_(3)layer,which can inhibit the further pollution of molten steel by refractories,whereas the MgO-Al_(2)O_(3)layer formed in test of fused magnesia castable is not continuous.After 30 min holding,the total oxygen content in the steel samples for the test of microporous magnesia castable is only 42.2%of that for the test of fused magnesia castable.The inclusions in the steel samples for the test of microporous magnesia castable are also less than those for the test of fused magnesia castable.It shows that microporous magnesia castable is a promising tundish refractory for the preparation of clean high-Al steel.

关 键 词：Microporous magnesia castable Fused magnesia castable High-Al steel CLEANLINESS Tundish lining refractory 

分 类 号：TG142[一般工业技术—材料科学与工程]