Behavior of MgO·Al_2O_3 Based Inclusions in Alloy Steel During Refining Process

作     者：YANG Shu-feng LI Jing-she ZHANG Li-feng Kent Peaslee WANG Zai-fei 

作者机构：School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 1000.83 China Department of Materials Science and Engineering Missouri University of Science and Technology Rolla 65401 M. issouri USA 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2010年第17卷第7期

页      面：1-6页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Item Sponsored by China Postdoctoral Science Foundation(20080430020) 

主　　题：alloy steel non-metallic inclusion MgO· Al2O spinel thermodynamics 

摘      要：The transformation of MgO· Al2O based inclusions in alloy steel during refining has been studied by in- dustrial trials. Besides Factsage software is used to sttidy the formation and modification of spinel inclusions in alloy steel using calcium treatment during refining process. The results show that the transformation sequence of inclu- sions is：MgO· Al2O→CaO-Al2O3-MgO complex inclusions--→MgO· Al2O, and under present experimental con- dition, in order to avoid forming MgO· Al2O inclusions the content of dissolved Ca in the molten steel has to reach 1 × 10-6. Also the results show that when more calcium was added to molten steel, the content of Alz 03 and MgO will be lower. Besides, increasing the content of CaO in the inclusions will increase even if tlae content of SiO2 changes little.