Application of Al-free deoxidizer in rail steel manufacture  

作　　者：Wei Wu Liu Liu 

机构地区：[1]Metallurgical Technology Research Department, Central Iron ＆ Steel Research Institute, Beijing 100081, China

出　　处：《Journal of University of Science and Technology Beijing》2008年第5期534-537,共4页北京科技大学学报（英文版）

摘　　要：Because there are a lot of influences of alumina inclusions on the performance of rail steel,it is reasonable to adopt the deoxidization method with Al-free deoxidizer. According to the characteristics of Al-free deoxidization process,the control of aluminum content,the deoxidization with ladle furnace（LF） slag,the deoxidization process under vacuum by carbon,and the inclusions modification technology by calcium treatment were studied. All of them were applied to practical production. The results indicate that the adoption of Al-free deoxidization process leads to the total oxygen content in the steel below 20 ppm,which meets the requirement of clean rail steel.Because there are a lot of influences of alumina inclusions on the performance of rail steel,it is reasonable to adopt the deoxidization method with Al-free deoxidizer. According to the characteristics of Al-free deoxidization process,the control of aluminum content,the deoxidization with ladle furnace（LF） slag,the deoxidization process under vacuum by carbon,and the inclusions modification technology by calcium treatment were studied. All of them were applied to practical production. The results indicate that the adoption of Al-free deoxidization process leads to the total oxygen content in the steel below 20 ppm,which meets the requirement of clean rail steel.

关 键 词：rail steel DEOXIDIZER REFINING oxygen activity 

分 类 号：TG142[一般工业技术—材料科学与工程]