Study on Effect of Ce for Titanium Inclusion of Steel by Aqueous Electrolysis

The titanium-containing inclusions in the titanium-containing microalloyed steel were completely electrolytically extracted by an aqueous solution electrolytic method,and the non-destructive separation of the inclusions was achieved by a physical magnetic separation method.Samples of titanium-containing inclusions were prepared by ultrasonic dispersion and dripping of the suspension of the inclusions,and the morphology of titanium-containing inclusions in steel with the addition of rare earth was studied in combination with a scanning electron microscope.The study results showed that the morphology of titanium-containing inclusions changed to varying degrees with the increase in the amount of rare earth added.Without the addition of rare earth cerium,the titanium-containing inclusions in the steel had a typical cuboid morphology.When 0.003 8% rare-earth cerium was added,the rectangular parallelepiped titanium-containing inclusions were transformed into rectangular parallelepiped titanium-containing inclusions.When the amount of rare earth added was 0.005 4%,0.007 2%,and 0.009 8%,TiC-CeAlO₃,Ti（C,N）-CeAlO₃ formed,and the titanium-containing inclusions gradually changed into ellipsoid,and sphere,and the shape changed from the angular shape into inclusions with smooth curved surfaces,and the size of titanium-containing inclusions are reduced.With the increase of the amount of rare earth added,the precipitation amount of titanium-containing inclusions in steel increased,the precipitation ratio of titanium-containing inclusions with a diameter less than 1 μm increased,and the average size of titanium-containing inclusions gradually decreased.