Evolution of Inclusions with Ce Addition and Ca Treatment in Al-killed Steel during RH Refining Process

The evolution of inclusions with Ce addition and Ca treatment in Al-killed steel during RH refining process was investigated through experimental observations thermodynamic calculations. results indicated that the typical before are CaO–Al2O3 inclusions, which were a liquid state refining. After addition, transformed from calcium aluminate inclusion to (Ca–Ce–S–O)+(Ce–Al–Ca–O) complex inclusion. treatment, types morphologies did not change. Experimental observation calculations shown certain amount can’t affect formation Ce-containing inclusion, may indicate should be carried out for rare earth treated steel.