Behavior of Mold Slag Used for 20Mn23Al Nonmagnetic Steel During Casting

查看全文 作　　者：YU Xiong WEN Guang-hua TANG Ping MA Fan-jun WANG [1]Huan

机构地区：[1]College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

出　　处：《Journal of Iron and Steel Research(International)》索引2011年第18卷第1期,共6页

基　　金：Item Sponsored by National Natural Science Foundation of China(50874125) 摘　　要：Because of the addition of significant quantities of aluminum and manganese,the great challenge of casting 20Mn23Al nonmagnetic steel is to design a mold slag that is chemically compatible with this steel composition.A new mold slag with low melting point and low basicity was proposed.The initial slag(the base mold slag)and two corresponding mold slags sampled after 8 min and 15 min were investigated,and the changes of mold slag composition and properties of molten slag were discussed.The results showed that the slag quickly changed in chemical composition to a slag that contained a small quantity of silica and a larger quantity of alumina,and the basicity increased obviously;the heat flux density through the slag film decreased slightly compared with the slag film at 0 min,8 min and 15 min;the mold slag used for nonmagnetic steel was precipitated as CaF2 crystals.The casting experiment shows that the slab has good surface quality without longitudinal face cracks and slag inclusions;the Al2O3 content in the molten slag pool increased with time at the beginning stage,and it can approach equilibrium state after about 600 s. 关键词：模具钢非磁性铸造钢材 Al2O3含量行为化学成分二氧化硅

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Behavior of Mold Slag Used for 20Mn23Al Nonmagnetic Steel During Casting

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