Abstract：Generally, in order to control the inclusions’ morphologies, the low carbon Al-killed steel should be treated with calcium. It’s the most difficult and important to make the inclusions to be liquid (CaO)x(Al2O3)y inclusions though the processing control. We get the correlation figures between solute calcium and solute aluminum, also between solute sulfur and solute aluminium theoretically. Taking a kind of low carbon Al-killed steel for example, when the solute aluminium is 0.03 percent and the calcium is controlled 9-15.8ppm, the liquid approximate (CaO)12(Al2O3)7 inclusions produce in the molten steel. If the solute sulfur is blow 30ppm and the solute aluminium is between 0.03 to 0.04 percent in the molten steel, when the temperature is below 1723K, the CaS will precipitate on the (CaO)12(Al2O3)7 surface. The sulfur capability of the inclusions increases distinctly when the molar fraction is larger than 0.6. So the inclusions have strong ability in absorbing sulfur.
王敏. 低碳铝镇静钢中(CaO)x(Al2O3)y及CaS的形成与控制[J]. 钢铁, 2009, 44(12): 46-46.
WANG MIN. The Formation and Control of (CaO)x(Al2O3)y and CaS in Low Carbon All-killed Molten Steel. Iron and Steel, 2009, 44(12): 46-46.
2009, Vol. 44 
