NO SHOW: Evolution of Inclusions in Heavy Rail Steel During LF Refining

The composition of inclusions in a heavy rail steel was mainly SiO2-rich MnO-SiO2 slag. After the slag adjustment process, inclusions were modified to CaO-rich Al2O3-SiO2-CaO. The composition of inclusions was Al2O3-SiO2-CaO-MgO after the alloying process. Then, the Al2O3 content in inclusions continuously increased during the ladle furnace process, leading to the formation of inclusions with a high melting point. The hardness and brittleness of the Al2O3-rich inclusions was harmful to the performance of the heavy rail steel. Therefore, it was suggested to lower the Al2O3 content in inclusions with a low melting point in heavy rail steel.

Yaoqiang Li | Yanshan University
 

Xuewei Zhang | North China University of Technology
 

Lifeng Zhang | North China University of Technology