RESEARCH ON AS-CAST GRAIN REFINING TECHNOLOGY BY INOCULATING CLEAN STEEL WITH TITANIUM OXIDE

摘要

Precipitation condition and nucleation of Ti_2O_3 during solidification of clean steel have been studied. The behavior of Ti_2O_3 during solidification as well as possibility of using Ti_2O_3 to refine as-cast grains as heterogeneous nucleation sites is discussed. It is shown that Ti_2O_3 can be formed provided that the steelmaking and solidification process is controlled strictly. And inoculating clean steel with Ti_2O_3 is an effective way to refine as-cast grains.