Experimental Study of Refining and Modification of Steel with Si–Ca, Si–Sr, and Si–Ba Alloys

Resumo

The results of thermodynamic calculations and experimental studies of the deoxidation, desulfurization, and modification of low-carbon steel with aluminum and Si–Ca, Si–Sr, and Si–Ba alloys are presented. The metal treatment with silicocalcium leads to the formation of corrosive non-metallic inclusions (CANI). The replacement of calcium-containing alloys with Ba and Sr alloys helps to clean steel from CANI, the formation of smaller complex oxysulfide non-metallic inclusions and a change in the grain size of metal. The calculated data are consistent with the experimental results.