Inclusion Control of Fe-16 percent Cr stainless steel melts by Aluminium deoxidation and calcium treatment

摘要

Chromium stainless steels have been widely used for corrosion-resistant materials at room or high temperatures, as well as construction materials. The effect of deoxidation equilibria on the inclusion formation is important from the viewpoint that the oxide inclusions probably deteriorate corrosion resistance and cause the surface defects and cracks during deep drawing or spinning manufacturing. In stainless steelmaking processes, deoxidizers such as silicon and/or aluminum have been added in the AOD (argon oxygen decarburization) converter or ladle in accordance with steel grades. Nevertheless, the deoxidation equilibria of chromium stainless steels have not widely been investigated, while those of chromium-nickel steels have been studied by many researchers.